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Эти рекомендации можно применить к любому языку программирования, в статье для примеров кода используется JavaScript.\n\n::programs\n\n## Содержание\n\n## Что значит (P)A/HC/LC?\n\nВ этой практике используется следующий шаблон для именования функции:\n\n```text\nпрефикс? (P) + действие (A) + высокоуровневый контекст (HC) + низкоуровневый контекст? (LC)\n```\n\n## Что обозначает префикс (P)?\n\n*Префикс* расширяет смысл функции.\n\n\n- is Описывает свойство или состояние текущего контекста (обычно — логическое значение).\n\n```javascript\nconst color = 'blue';\nconst isBlue = (color === 'blue'); // свойство\nconst isPresent = true; // состояние\n\nif (isBlue && isPresent) {\n console.log('Blue is present!');\n}\n```\n\n- has Указывает, имеет ли текущий контекст определенное значение или состояние (обычно — логическое значение).\n\n```javascript\n/* Плохо */\nconst isProductsExist = (productsCount > 0);\nconst areProductsPresent = (productsCount > 0);\n\n/* Хорошо */\nconst hasProducts = (productsCount > 0);\n```\n\n- should Отражает положительный условный оператор (обычно — логическое значение), связанный с определенным действием.\n\n```javascript\nconst shouldUpdateUrl = (url, expectedUrl) => url !== expectedUrl;\n```\n\n## Действие — это сердце функции\n\n**Действие** — это глагольная часть имени функции. Это самая важная часть в описании того, что делает функция.\n\n\n- get Получает доступ к данным немедленно (сокращение от getter для внутренних данных).\n\n```javascript\nfunction getFruitsCount() {\n return this.fruits.length;\n}\n```\n\n- set Безусловно присваивает переменной со значением A значение B.\n\n```javascript\nlet fruits = 0;\n\nconst setFruits = (nextFruits) => {\n fruits = nextFruits;\n};\n\nsetFruits(5);\nconsole.log(fruits); // 5\n```\n\n- reset Возвращает переменную к её начальному значению или состоянию.\n\n```javascript\nconst initialFruits = 5;\nlet fruits = initialFruits;\nsetFruits(10);\nconsole.log(fruits); // 10\n\nconst resetFruits = () => {\n fruits = initialFruits;\n};\n\nresetFruits();\nconsole.log(fruits); // 5\n```\n\n- fetch Выполняет запрос данных, для которого требуется время (например, асинхронный запрос).\n\n```javascript\nconst fetchPosts = (postCount) => fetch('https://api.dev/posts', {...});\n```\n\n- remove Удаляет что-то откуда-то.\n\nНапример, если у вас есть коллекция выбранных фильтров на странице поиска, удаление одного из них из коллекции — это `removeFilter`, а не `deleteFilter` (именно так вы и скажете на английском языке):\n\n```javascript\nconst removeFilter = (filterName, filters) => filters.filter((name) => name !== filterName);\n\nconst selectedFilters = ['price', 'availability', 'size'];\nremoveFilter('price', selectedFilters);\n```\n\n```\n- delete\n```\n\nПолностью стирает что-то. После операции сущность перестаёт существовать.\n\nПредставьте, что вы редактор контента, и есть пост, от которого вы хотите избавиться. Как только вы нажали на кнопку delete-post, CMS выполнила действие `deletePost`, а не `removePost`.\n\n```javascript\nconst deletePost = (id) => database.find({ id }).delete();\n```\n\n```\n- compose\n```\n\nСоздает новые данные из существующих. Обычно это применимо к строкам, объектам или функциям.\n\n```javascript\nconst composePageUrl = (pageName, pageId) => `${pageName.toLowerCase()}-${pageId}`;\n```\n\n```\n- handle\n```\n\nОбработка действия. Часто используется при именовании обратного вызова.\n\n```javascript\nconst handleLinkClick = () => {\n console.log('Clicked a link!');\n};\n\nlink.addEventListener('click', handleLinkClick);\n```\n\n## Контекст\n\n**Контекст** — это область, с которой работает функция.\n\nФункция — это часто действие с чем-то. Важно указать, какова её рабочая область или, по крайней мере, ожидаемый тип данных.\n\n```javascript\n/* Чистая функция, работающая с примитивами */\nconst filter = (list, predicate) => list.filter(predicate);\n\n/* Функция, работающая непосредственно с сообщениями */\nconst getRecentPosts = (posts) => filter(posts, (post) => post.date === Date.now());\n\n/*\nНекоторые специфические для языка допущения позволяют опустить контекст.\nНапример, в JavaScript фильтр обычно работает с массивом (Array).\nДобавление явного filterArray будет избыточным.\n*/\n```\n\n## В итоге\n\n\n\n### Пять принципов именования переменных\n\nВ этом разделе мы предложим некоторые правила именования переменных, которые улучшат читаемость кода.\n\n#### 1. Следуйте S-I-D\n\nИмя должно быть коротким (**S**hort), интуитивно понятным (**I**ntuitive) и описательным (**D**escriptive).\n\n```javascript\n/* Плохо */\nconst a = 5; // \"a\" может обозначать что угодно\nconst isPaginatable = (postsCount > 10); // \"Paginatable\" звучит крайне неестественно\nconst shouldPaginatize = (postsCount > 10); // Придуманные глаголы - это так весело!\n\n/* Хорошо */\nconst postsCount = 5;\nconst hasPagination = (postsCount > 10);\nconst shouldDisplayPagination = (postsCount > 10); // альтернатива\n```\n\n#### 2. Избегайте сокращений\n\nНе используйте сокращения. Обычно они только ухудшают читаемость кода. Найти короткое, описательное имя может быть сложно, но сокращения не могут быть оправданием для того, чтобы этого не делать. Например:\n\n```javascript\n/* Плохо */\nconst onItmClk = () => {};\n\n/* Хорошо */\nconst onItemClick = () => {};\n```\n\n#### 3. Избегайте дублирования контекста\n\nВсегда удаляйте контекст из имени, если это не снижает его читабельность.\n\n```javascript\nclass MenuItem {\n /* Имя метода дублирует контекст (которым является \"MenuItem\") */\n handleMenuItemClick(event) {\n ...\n }\n\n /* Читается как `MenuItem.handleClick()` */\n handleClick(event) {\n ...\n }\n}\n```\n\n#### 4. Отражайте в имени ожидаемый результат\n\n```javascript\n/* Плохо */\nconst isEnabled = (itemsCount > 3);\n\n/* Хорошо */\nconst isDisabled = (itemsCount <= 3);\n```\n\n::posts\n\n#### 5. Учитывайте единственное/множественное число\n\nКак и префикс, имена переменных могут быть единственного или множественного числа в зависимости от того, имеют ли они одно значение или несколько.\n\n```javascript\n/* Плохо */\nconst friends = 'Bob';\nconst friend = ['Bob', 'Tony', 'Tanya'];\n\n/* Хорошо */\nconst friend = 'Bob';\nconst friends = ['Bob', 'Tony', 'Tanya'];\n```\n\n#### 6. Используйте осмысленные и произносимые имена\n\n```javascript\n/* Просто ужасно */\nconst yyyymmdstr = moment().format(\"YYYY/MM/DD\");\n\n/* Гораздо лучше */\nconst currentDate = moment().format(\"YYYY/MM/DD\");\n```\n","reading_time":3,"url":"https://ru.hexlet.io/blog/posts/rukovodstvo-po-imenovaniyu-klassov-funktsiy-i-peremennyh","cover_thumb_variant":null,"cover_list_variant":"/vite/assets/blog_post-7eTyeLLt.webp","cover_main_variant":"/vite/assets/blog_post-7eTyeLLt.webp","related_stacks_count":5},"relatedPosts":[{"model_name":"BlogPost","id":926,"title":"Библиотека React: особенности, перспективы, ситуация на рынке труда","slug":"biblioteka-react-review-article","summary":"В объявлениях о поиске программистов часто встречается требование уметь работать с React. Иногда работодатели ожидают знания React не только от фронтендеров, но и от бэкенд-разработчиков. Почему эта библиотека настолько популярная, стоит ли изучать её сегодня, каковы её перспективы по мнению опытных программистов? Ответы на эти и другие вопросы читайте в обзорной статье.","created_at":"2020-07-08T15:15:00.191Z","published_at":"2024-02-29T07:46:44.876Z","cover_list_variant":"https://hexlet.io/rails/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6MTYyOCwicHVyIjoiYmxvYl9pZCJ9fQ==--6bac7610f325471938a0e33f58eaa4c52527d66f/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJ3ZWJwIiwicmVzaXplX2FuZF9wYWQiOls3MDgsMzU0XSwic2F2ZXIiOnsicXVhbGl0eSI6ODV9fSwicHVyIjoidmFyaWF0aW9uIn19--324dc52aa55ebe818c2a887ebcb832b9ad1c0381/%D1%87%D1%82%D0%BE%D1%82%D0%B0%D0%BA%D0%BE%D0%B5react-01.png"},{"model_name":"BlogPost","id":416,"title":"Язык программирования JavaScript: где его используют и почему он популярен","slug":"stoit-li-uchit-javascript-perspektivy-situatsiya-na-rynke-truda-mneniya-ekspertov","summary":"Рассказываем, что это за язык программирования — JavaScript, где его используют, насколько он популярен и с чего начать изучение JavaScript.","created_at":"2019-07-26T08:17:06.287Z","published_at":"2023-10-04T08:41:58.734Z","cover_list_variant":"https://hexlet.io/rails/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6MTcwMywicHVyIjoiYmxvYl9pZCJ9fQ==--aa69869c906a992728ba7c26886fa1b715024424/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJ3ZWJwIiwicmVzaXplX2FuZF9wYWQiOls3MDgsMzU0XSwic2F2ZXIiOnsicXVhbGl0eSI6ODV9fSwicHVyIjoidmFyaWF0aW9uIn19--324dc52aa55ebe818c2a887ebcb832b9ad1c0381/%D1%8F%D0%B7%D1%8B%D0%BA%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D1%8Fjavascript-01.png"},{"model_name":"BlogPost","id":480,"title":"Все про Node.js: зачем писать бэкенд на JavaScript и сколько за это платят","slug":"zachem-izuchat-node-js-ili-o-perspektivah-bekenda-na-javascript","summary":"Рассказываем, как устроен бэкенд на JavaScript, стоит ли изучать Node.js, когда есть PHP и Python, какое будущее у этой технологии и сколько платят программистам на Node.js.","created_at":"2019-09-27T08:33:36.150Z","published_at":"2023-07-28T13:31:55.753Z","cover_list_variant":"https://hexlet.io/rails/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6MTY4MywicHVyIjoiYmxvYl9pZCJ9fQ==--8e5dd13a34bb6d61f1c0db87a25e6e64d0e237fb/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJ3ZWJwIiwicmVzaXplX2FuZF9wYWQiOls3MDgsMzU0XSwic2F2ZXIiOnsicXVhbGl0eSI6ODV9fSwicHVyIjoidmFyaWF0aW9uIn19--324dc52aa55ebe818c2a887ebcb832b9ad1c0381/node%20_new-01.png"}],"category":{"id":4,"name":"Код","slug":"code","state":"published","created_at":"2016-08-23T13:33:44.258Z"},"mainStackCategory":{"id":12,"name":"Курсы по JavaScript","slug":"javascript","short_name":"JavaScript","order":71,"state":"published","category_slug":"courses_javascript"},"categories":[{"id":6,"name":"Мотивация","slug":"motivation","state":"published","created_at":"2016-10-06T18:31:38.903Z"},{"id":3,"name":"Истории 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г.</div><div style="--group-gap:calc(0.1875rem * var(--mantine-scale));--group-align:center;--group-justify:flex-start;--group-wrap:wrap" class="m_4081bf90 mantine-Group-root"><div style="--ti-size:var(--ti-size-xs);--ti-bg:transparent;--ti-color:var(--mantine-color-indigo-light-color);--ti-bd:calc(0.0625rem * var(--mantine-scale)) solid transparent;color:inherit" class="m_7341320d mantine-ThemeIcon-root" data-variant="transparent" data-size="xs"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-clock "><path d="M3 12a9 9 0 1 0 18 0a9 9 0 0 0 -18 0"></path><path d="M12 7v5l3 3"></path></svg></div>3 минуты</div><div style="--group-gap:calc(0.1875rem * var(--mantine-scale));--group-align:center;--group-justify:flex-start;--group-wrap:wrap" class="m_4081bf90 mantine-Group-root"><div style="--ti-size:var(--ti-size-xs);--ti-bg:transparent;--ti-color:var(--mantine-color-indigo-light-color);--ti-bd:calc(0.0625rem * var(--mantine-scale)) solid transparent;color:inherit" class="m_7341320d mantine-ThemeIcon-root" data-variant="transparent" data-size="xs"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-thumb-up "><path d="M7 11v8a1 1 0 0 1 -1 1h-2a1 1 0 0 1 -1 -1v-7a1 1 0 0 1 1 -1h3a4 4 0 0 0 4 -4v-1a2 2 0 0 1 4 0v5h3a2 2 0 0 1 2 2l-1 5a2 3 0 0 1 -2 2h-7a3 3 0 0 1 -3 -3"></path></svg></div>43</div></div><div style="--ar-ratio:2" class="m_71ac47fc mantine-AspectRatio-root"><img style="--image-radius:var(--mantine-radius-md);--image-object-fit:cover;width:100%;height:100%" class="m_9e117634 mantine-Image-root" src="/vite/assets/blog_post-7eTyeLLt.webp" alt="Практическое руководство по именованию классов, функций и переменных"/></div></div><div role="link" tabindex="0" style="cursor:pointer"><button style="display:block;width:100%" class="mantine-focus-auto m_87cf2631 mantine-UnstyledButton-root" type="button" aria-label="Присоединяйтесь к нашему Telegram-сообществу"><div style="background-color:light-dark(var(--mantine-color-gray-1), var(--mantine-color-dark-6))" class="m_e615b15f mantine-Card-root m_1b7284a3 mantine-Paper-root"><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:flex-start;--group-wrap:wrap" class="m_4081bf90 mantine-Group-root"><div style="--ti-bg:transparent;--ti-color:var(--mantine-color-indigo-light-color);--ti-bd:calc(0.0625rem * var(--mantine-scale)) solid transparent;margin-inline-end:auto;color:inherit" class="m_7341320d mantine-ThemeIcon-root" data-variant="transparent"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-brand-telegram "><path d="M15 10l-4 4l6 6l4 -16l-18 7l4 2l2 6l3 -4"></path></svg></div>Присоединяйтесь к нашему Telegram-сообществу</div></div></button></div><div style="margin-bottom:var(--mantine-spacing-xl)" class="m_d08caa0 mantine-Typography-root"><p><strong>В этой статье мы подробно рассказываем о методах именования классов, функций и переменных, которые позволяют улучшить читаемость вашего кода.</strong></p>
<p><em>Это перевод статьи <a style="text-decoration:underline" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="https://betterprogramming.pub/a-useful-framework-for-naming-your-classes-functions-and-variables-e7d186e3189f" rel="noopener noreferrer" target="_blank">A Useful Framework for Naming Your Classes, Functions, and Variables</a></em></p>
<p><em>Автор оригинала <a style="text-decoration:underline" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="https://tunvir.medium.com/" rel="noopener noreferrer" target="_blank">XOR</a></em></p>
<p>«В компьютерном программировании соглашение об именах — набор правил для выбора последовательности символов, которая будет использоваться для идентификаторов, которые обозначают переменные, типы, функции и другие объекты в исходном коде и документации», —
<a style="text-decoration:underline" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="https://ru.wikipedia.org/wiki/%D0%A1%D0%BE%D0%B3%D0%BB%D0%B0%D1%88%D0%B5%D0%BD%D0%B8%D1%8F_%D0%BE%D0%B1_%D0%B8%D0%BC%D0%B5%D0%BD%D0%B0%D1%85_(%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D0%B5)" rel="noopener noreferrer" target="_blank">«Википедия»</a></p>
<p><strong><em>Придумывать названия сложно!</em></strong></p>
<p>В этой статье мы сосредоточимся на методе именования (P)A/HC/LC для того, чтобы улучшить читаемость кода. Эти рекомендации можно применить к любому языку программирования, в статье для примеров кода используется JavaScript.</p>
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style="cursor:pointer;height:100%"><a style="text-decoration:none" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="/courses?promo_name=programs_list&promo_position=blog_post&promo_creative=catalog_card&promo_type=card"><div style="height:100%" class="m_e615b15f mantine-Card-root m_1b7284a3 mantine-Paper-root" data-with-border="true"><h2 style="--title-fw:var(--mantine-h2-font-weight);--title-lh:var(--mantine-h2-line-height);--title-fz:var(--mantine-h2-font-size);margin-bottom:var(--mantine-spacing-md);font-size:var(--mantine-font-size-h3)" class="m_8a5d1357 mantine-Title-root" data-order="2" data-responsive="true">Каталог</h2><p style="margin-bottom:auto" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Полный список доступных курсов по разным направлениям</p><div style="margin-top:auto" class=""><div class="m_4451eb3a mantine-Center-root"><img style="opacity:0.8;width:70%" class="m_9e117634 mantine-Image-root mantine-visible-from-xs" src="/vite/assets/development-BVihs_d5.png" alt="Orientation"/></div></div></div></a></div></div></div></div></div>
<h2 id="heading-2-1">Содержание</h2>
<ul>
<li><a style="text-decoration:underline" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="#heading-2-2">Что значит (P)A/HC/LC?</a></li>
<li><a style="text-decoration:underline" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="#heading-2-3">Что обозначает префикс (P)?</a></li>
<li><a style="text-decoration:underline" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="#heading-2-4">Действие — это сердце функции</a></li>
<li><a style="text-decoration:underline" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="#heading-2-5">Контекст</a></li>
<li><a style="text-decoration:underline" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="#heading-2-6">В итоге</a></li>
</ul>
<h2 id="heading-2-2">Что значит (P)A/HC/LC?</h2>
<p>В этой практике используется следующий шаблон для именования функции:</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">префикс? (P) + действие (A) + высокоуровневый контекст (HC) + низкоуровневый контекст? (LC)</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<h2 id="heading-2-3">Что обозначает префикс (P)?</h2>
<p><em>Префикс</em> расширяет смысл функции.</p>
<ul>
<li>is Описывает свойство или состояние текущего контекста (обычно — логическое значение).</li>
</ul>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">const color = 'blue';
const isBlue = (color === 'blue'); // свойство
const isPresent = true; // состояние
if (isBlue && isPresent) {
console.log('Blue is present!');
}</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<ul>
<li>has Указывает, имеет ли текущий контекст определенное значение или состояние (обычно — логическое значение).</li>
</ul>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">/* Плохо */
const isProductsExist = (productsCount > 0);
const areProductsPresent = (productsCount > 0);
/* Хорошо */
const hasProducts = (productsCount > 0);</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<ul>
<li>should Отражает положительный условный оператор (обычно — логическое значение), связанный с определенным действием.</li>
</ul>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">const shouldUpdateUrl = (url, expectedUrl) => url !== expectedUrl;</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<h2 id="heading-2-4">Действие — это сердце функции</h2>
<p><strong>Действие</strong> — это глагольная часть имени функции. Это самая важная часть в описании того, что делает функция.</p>
<ul>
<li>get Получает доступ к данным немедленно (сокращение от getter для внутренних данных).</li>
</ul>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">function getFruitsCount() {
return this.fruits.length;
}</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<ul>
<li>set Безусловно присваивает переменной со значением A значение B.</li>
</ul>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">let fruits = 0;
const setFruits = (nextFruits) => {
fruits = nextFruits;
};
setFruits(5);
console.log(fruits); // 5</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<ul>
<li>reset Возвращает переменную к её начальному значению или состоянию.</li>
</ul>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">const initialFruits = 5;
let fruits = initialFruits;
setFruits(10);
console.log(fruits); // 10
const resetFruits = () => {
fruits = initialFruits;
};
resetFruits();
console.log(fruits); // 5</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<ul>
<li>fetch Выполняет запрос данных, для которого требуется время (например, асинхронный запрос).</li>
</ul>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">const fetchPosts = (postCount) => fetch('https://api.dev/posts', {...});</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<ul>
<li>remove Удаляет что-то откуда-то.</li>
</ul>
<p>Например, если у вас есть коллекция выбранных фильтров на странице поиска, удаление одного из них из коллекции — это <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">removeFilter</code>, а не <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">deleteFilter</code> (именно так вы и скажете на английском языке):</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">const removeFilter = (filterName, filters) => filters.filter((name) => name !== filterName);
const selectedFilters = ['price', 'availability', 'size'];
removeFilter('price', selectedFilters);</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">- delete</code>
<p>Полностью стирает что-то. После операции сущность перестаёт существовать.</p>
<p>Представьте, что вы редактор контента, и есть пост, от которого вы хотите избавиться. Как только вы нажали на кнопку delete-post, CMS выполнила действие <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">deletePost</code>, а не <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">removePost</code>.</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">const deletePost = (id) => database.find({ id }).delete();</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">- compose</code>
<p>Создает новые данные из существующих. Обычно это применимо к строкам, объектам или функциям.</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">const composePageUrl = (pageName, pageId) => `${pageName.toLowerCase()}-${pageId}`;</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">- handle</code>
<p>Обработка действия. Часто используется при именовании обратного вызова.</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">const handleLinkClick = () => {
console.log('Clicked a link!');
};
link.addEventListener('click', handleLinkClick);</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<h2 id="heading-2-5">Контекст</h2>
<p><strong>Контекст</strong> — это область, с которой работает функция.</p>
<p>Функция — это часто действие с чем-то. Важно указать, какова её рабочая область или, по крайней мере, ожидаемый тип данных.</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">/* Чистая функция, работающая с примитивами */
const filter = (list, predicate) => list.filter(predicate);
/* Функция, работающая непосредственно с сообщениями */
const getRecentPosts = (posts) => filter(posts, (post) => post.date === Date.now());
/*
Некоторые специфические для языка допущения позволяют опустить контекст.
Например, в JavaScript фильтр обычно работает с массивом (Array).
Добавление явного filterArray будет избыточным.
*/</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<h2 id="heading-2-6">В итоге</h2>
<p><img style="--image-object-fit:contain;width:auto" class="m_9e117634 mantine-Image-root" src="https://imgur.com/TiZRsbf.png" alt="" loading="lazy"/></p>
<h3 id="heading-3-7">Пять принципов именования переменных</h3>
<p>В этом разделе мы предложим некоторые правила именования переменных, которые улучшат читаемость кода.</p>
<h4 id="heading-4-8">1. Следуйте S-I-D</h4>
<p>Имя должно быть коротким (<strong>S</strong>hort), интуитивно понятным (<strong>I</strong>ntuitive) и описательным (<strong>D</strong>escriptive).</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">/* Плохо */
const a = 5; // "a" может обозначать что угодно
const isPaginatable = (postsCount > 10); // "Paginatable" звучит крайне неестественно
const shouldPaginatize = (postsCount > 10); // Придуманные глаголы - это так весело!
/* Хорошо */
const postsCount = 5;
const hasPagination = (postsCount > 10);
const shouldDisplayPagination = (postsCount > 10); // альтернатива</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<h4 id="heading-4-9">2. Избегайте сокращений</h4>
<p>Не используйте сокращения. Обычно они только ухудшают читаемость кода. Найти короткое, описательное имя может быть сложно, но сокращения не могут быть оправданием для того, чтобы этого не делать. Например:</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">/* Плохо */
const onItmClk = () => {};
/* Хорошо */
const onItemClick = () => {};</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<h4 id="heading-4-10">3. Избегайте дублирования контекста</h4>
<p>Всегда удаляйте контекст из имени, если это не снижает его читабельность.</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">class MenuItem {
/* Имя метода дублирует контекст (которым является "MenuItem") */
handleMenuItemClick(event) {
...
}
/* Читается как `MenuItem.handleClick()` */
handleClick(event) {
...
}
}</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<h4 id="heading-4-11">4. Отражайте в имени ожидаемый результат</h4>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">/* Плохо */
const isEnabled = (itemsCount > 3);
/* Хорошо */
const isDisabled = (itemsCount <= 3);</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<style data-mantine-styles="inline">.__m__-_R_3tderddmiub_{--carousel-slide-gap:var(--mantine-spacing-xs);--carousel-slide-size:80%;}@media(min-width: 36em){.__m__-_R_3tderddmiub_{--carousel-slide-gap:var(--mantine-spacing-xl);--carousel-slide-size:50%;}}</style><div style="--carousel-control-size:calc(2.5rem * var(--mantine-scale));--carousel-controls-offset:var(--mantine-spacing-sm);margin-bottom:var(--mantine-spacing-lg);padding-block:var(--mantine-spacing-sm);background:var(--app-color-surface)" class="m_17884d0f mantine-Carousel-root responsiveClassName" data-orientation="horizontal" data-include-gap-in-size="true"><div class="m_39bc3463 mantine-Carousel-controls" data-orientation="horizontal"><button class="mantine-focus-auto m_64f58e10 mantine-Carousel-control m_87cf2631 mantine-UnstyledButton-root" type="button" data-inactive="true" data-type="previous" tabindex="-1"><svg viewBox="0 0 15 15" fill="none" xmlns="http://www.w3.org/2000/svg" style="transform:rotate(90deg);width:calc(1rem * var(--mantine-scale));height:calc(1rem * var(--mantine-scale));display:block"><path d="M3.13523 6.15803C3.3241 5.95657 3.64052 5.94637 3.84197 6.13523L7.5 9.56464L11.158 6.13523C11.3595 5.94637 11.6759 5.95657 11.8648 6.15803C12.0536 6.35949 12.0434 6.67591 11.842 6.86477L7.84197 10.6148C7.64964 10.7951 7.35036 10.7951 7.15803 10.6148L3.15803 6.86477C2.95657 6.67591 2.94637 6.35949 3.13523 6.15803Z" fill="currentColor" fill-rule="evenodd" clip-rule="evenodd"></path></svg></button><button class="mantine-focus-auto m_64f58e10 mantine-Carousel-control m_87cf2631 mantine-UnstyledButton-root" type="button" data-inactive="true" data-type="next" tabindex="-1"><svg viewBox="0 0 15 15" fill="none" xmlns="http://www.w3.org/2000/svg" style="transform:rotate(-90deg);width:calc(1rem * var(--mantine-scale));height:calc(1rem * var(--mantine-scale));display:block"><path d="M3.13523 6.15803C3.3241 5.95657 3.64052 5.94637 3.84197 6.13523L7.5 9.56464L11.158 6.13523C11.3595 5.94637 11.6759 5.95657 11.8648 6.15803C12.0536 6.35949 12.0434 6.67591 11.842 6.86477L7.84197 10.6148C7.64964 10.7951 7.35036 10.7951 7.15803 10.6148L3.15803 6.86477C2.95657 6.67591 2.94637 6.35949 3.13523 6.15803Z" fill="currentColor" fill-rule="evenodd" clip-rule="evenodd"></path></svg></button></div><div class="m_a2dae653 mantine-Carousel-viewport" data-type="media"><div class="m_fcd81474 mantine-Carousel-container __m__-_R_3tderddmiub_" data-orientation="horizontal"><div class="m_d98df724 mantine-Carousel-slide" data-orientation="horizontal"><div tabindex="0" style="cursor:pointer;height:100%"><a style="text-decoration:none" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="/blog/posts/biblioteka-react-review-article"><div style="padding-top:0rem;height:100%" class="m_e615b15f mantine-Card-root m_1b7284a3 mantine-Paper-root" data-with-border="true"><div style="margin-bottom:var(--mantine-spacing-sm)" class="m_599a2148 mantine-Card-section" data-first-section="true"><div style="--ar-ratio:2" class="m_71ac47fc mantine-AspectRatio-root"><img class="m_9e117634 mantine-Image-root" src="https://hexlet.io/rails/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6MTYyOCwicHVyIjoiYmxvYl9pZCJ9fQ==--6bac7610f325471938a0e33f58eaa4c52527d66f/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJ3ZWJwIiwicmVzaXplX2FuZF9wYWQiOls3MDgsMzU0XSwic2F2ZXIiOnsicXVhbGl0eSI6ODV9fSwicHVyIjoidmFyaWF0aW9uIn19--324dc52aa55ebe818c2a887ebcb832b9ad1c0381/%D1%87%D1%82%D0%BE%D1%82%D0%B0%D0%BA%D0%BE%D0%B5react-01.png" loading="lazy" alt="Библиотека React: особенности, перспективы, ситуация на рынке труда"/></div></div><p style="margin-bottom:var(--mantine-spacing-xs);font-size:var(--mantine-font-size-lg);font-weight:bold" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Библиотека React: особенности, перспективы, ситуация на рынке труда</p><p style="margin-bottom:auto" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">В объявлениях о поиске программистов часто встречается требование уметь работать с React. Иногда ...</p><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:space-between;--group-wrap:wrap;margin-top:var(--mantine-spacing-lg);font-size:var(--mantine-font-size-sm)" class="m_4081bf90 mantine-Group-root">29 февраля 2024 г.<p style="font-size:inherit" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Посмотреть →</p></div></div></a></div></div><div class="m_d98df724 mantine-Carousel-slide" data-orientation="horizontal"><div tabindex="0" style="cursor:pointer;height:100%"><a style="text-decoration:none" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="/blog/posts/stoit-li-uchit-javascript-perspektivy-situatsiya-na-rynke-truda-mneniya-ekspertov"><div style="padding-top:0rem;height:100%" class="m_e615b15f mantine-Card-root m_1b7284a3 mantine-Paper-root" data-with-border="true"><div style="margin-bottom:var(--mantine-spacing-sm)" class="m_599a2148 mantine-Card-section" data-first-section="true"><div style="--ar-ratio:2" class="m_71ac47fc mantine-AspectRatio-root"><img class="m_9e117634 mantine-Image-root" src="https://hexlet.io/rails/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6MTcwMywicHVyIjoiYmxvYl9pZCJ9fQ==--aa69869c906a992728ba7c26886fa1b715024424/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJ3ZWJwIiwicmVzaXplX2FuZF9wYWQiOls3MDgsMzU0XSwic2F2ZXIiOnsicXVhbGl0eSI6ODV9fSwicHVyIjoidmFyaWF0aW9uIn19--324dc52aa55ebe818c2a887ebcb832b9ad1c0381/%D1%8F%D0%B7%D1%8B%D0%BA%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D1%8Fjavascript-01.png" loading="lazy" alt="Язык программирования JavaScript: где его используют и почему он популярен"/></div></div><p style="margin-bottom:var(--mantine-spacing-xs);font-size:var(--mantine-font-size-lg);font-weight:bold" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Язык программирования JavaScript: где его используют и почему он популярен</p><p style="margin-bottom:auto" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Рассказываем, что это за язык программирования — JavaScript, где его используют, насколько он поп...</p><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:space-between;--group-wrap:wrap;margin-top:var(--mantine-spacing-lg);font-size:var(--mantine-font-size-sm)" class="m_4081bf90 mantine-Group-root">4 октября 2023 г.<p style="font-size:inherit" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Посмотреть →</p></div></div></a></div></div><div class="m_d98df724 mantine-Carousel-slide" data-orientation="horizontal"><div tabindex="0" style="cursor:pointer;height:100%"><a style="text-decoration:none" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="/blog/posts/zachem-izuchat-node-js-ili-o-perspektivah-bekenda-na-javascript"><div style="padding-top:0rem;height:100%" class="m_e615b15f mantine-Card-root m_1b7284a3 mantine-Paper-root" data-with-border="true"><div style="margin-bottom:var(--mantine-spacing-sm)" class="m_599a2148 mantine-Card-section" data-first-section="true"><div style="--ar-ratio:2" class="m_71ac47fc mantine-AspectRatio-root"><img class="m_9e117634 mantine-Image-root" src="https://hexlet.io/rails/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6MTY4MywicHVyIjoiYmxvYl9pZCJ9fQ==--8e5dd13a34bb6d61f1c0db87a25e6e64d0e237fb/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJ3ZWJwIiwicmVzaXplX2FuZF9wYWQiOls3MDgsMzU0XSwic2F2ZXIiOnsicXVhbGl0eSI6ODV9fSwicHVyIjoidmFyaWF0aW9uIn19--324dc52aa55ebe818c2a887ebcb832b9ad1c0381/node%20_new-01.png" loading="lazy" alt="Все про Node.js: зачем писать бэкенд на JavaScript и сколько за это платят"/></div></div><p style="margin-bottom:var(--mantine-spacing-xs);font-size:var(--mantine-font-size-lg);font-weight:bold" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Все про Node.js: зачем писать бэкенд на JavaScript и сколько за это платят</p><p style="margin-bottom:auto" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Рассказываем, как устроен бэкенд на JavaScript, стоит ли изучать Node.js, когда есть PHP и Python...</p><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:space-between;--group-wrap:wrap;margin-top:var(--mantine-spacing-lg);font-size:var(--mantine-font-size-sm)" class="m_4081bf90 mantine-Group-root">28 июля 2023 г.<p style="font-size:inherit" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Посмотреть →</p></div></div></a></div></div></div></div></div>
<h4 id="heading-4-12">5. Учитывайте единственное/множественное число</h4>
<p>Как и префикс, имена переменных могут быть единственного или множественного числа в зависимости от того, имеют ли они одно значение или несколько.</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">/* Плохо */
const friends = 'Bob';
const friend = ['Bob', 'Tony', 'Tanya'];
/* Хорошо */
const friend = 'Bob';
const friends = ['Bob', 'Tony', 'Tanya'];</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<h4 id="heading-4-13">6. Используйте осмысленные и произносимые имена</h4>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">/* Просто ужасно */
const yyyymmdstr = moment().format("YYYY/MM/DD");
/* Гораздо лучше */
const currentDate = moment().format("YYYY/MM/DD");</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div></div><div class=""><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:space-between;--group-wrap:wrap;margin-bottom:var(--mantine-spacing-lg)" class="m_4081bf90 mantine-Group-root"><div class="m_4451eb3a mantine-Center-root" data-inline="true"><div style="--ti-size:var(--ti-size-xs);--ti-bg:transparent;--ti-color:var(--mantine-color-indigo-light-color);--ti-bd:calc(0.0625rem * var(--mantine-scale)) solid transparent;margin-inline-end:var(--mantine-spacing-xs);color:inherit" class="m_7341320d mantine-ThemeIcon-root" data-variant="transparent" data-size="xs"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-user "><path d="M8 7a4 4 0 1 0 8 0a4 4 0 0 0 -8 0"></path><path d="M6 21v-2a4 4 0 0 1 4 -4h4a4 4 0 0 1 4 4v2"></path></svg></div><p style="margin-inline-end:var(--mantine-spacing-xl)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Александр Бурченко</p><p class="mantine-focus-auto m_b6d8b162 mantine-Text-root">5 лет назад</p></div><div style="align-items:center" class="m_8bffd616 mantine-Flex-root __m__-_R_5dirddmiub_"><a style="display:inline-flex" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="/blog/posts/rukovodstvo-po-imenovaniyu-klassov-funktsiy-i-peremennyh/votes"><div style="--ti-size:var(--ti-size-sm);--ti-bg:transparent;--ti-color:var(--mantine-color-indigo-light-color);--ti-bd:calc(0.0625rem * var(--mantine-scale)) solid transparent;margin-inline-end:var(--mantine-spacing-xs);color:inherit" class="m_7341320d mantine-ThemeIcon-root" data-variant="transparent" data-size="sm"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-thumb-up "><path d="M7 11v8a1 1 0 0 1 -1 1h-2a1 1 0 0 1 -1 -1v-7a1 1 0 0 1 1 -1h3a4 4 0 0 0 4 -4v-1a2 2 0 0 1 4 0v5h3a2 2 0 0 1 2 2l-1 5a2 3 0 0 1 -2 2h-7a3 3 0 0 1 -3 -3"></path></svg></div></a><p class="mantine-focus-auto m_b6d8b162 mantine-Text-root">43</p></div></div></div><div style="background-color:var(--mantine-color-indigo-light);border:calc(0.0625rem * var(--mantine-scale)) solid transparent;padding:var(--mantine-spacing-xl)" class="m_e615b15f mantine-Card-root m_1b7284a3 mantine-Paper-root"><p style="margin-bottom:var(--mantine-spacing-sm);font-size:var(--mantine-font-size-h4)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Читайте также:</p><ul 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