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<h1 class="inner-heading">🔥 What shocking news! It’s so scandalous! Such a sensation!</h1>
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<time datetime="2019-12-22">22 December 2019</time>
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<p>It turns out that you don’t have to be a cat to start programming in JavaScript! Scientists have created the first robot that can write and change its own code. He immediately learned how to code websites, and he left to work as a freelancer on Bali.</p>
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<li class="user-comment">Hmmm, it’s some kind of nonsense…</li>
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Minimum of boring theory and lots of practical tasks."><meta name="twitter:image" property="og:image" content="https://htmlacademy.org/og/htmlacademy.png"><meta name="twitter:card" content="summary_large_image"><link rel="canonical" href="https://htmlacademy.org/courses/javascript-basics/conditions-creating-elements/append-method"><meta name="theme-color" content="#2f358f"></head><body class="course-interface course-interface--light" data-base="/assets/courses/19/"><header class="page-header page-header--course"><div class="page-header__inner"><div class="page-header__top"><a class="page-header__logo" href="/" aria-label="HTML Academy Home"><img src="https://assets.htmlacademy.org/img/logo--small.svg?cs=1218aec0be4a5f23db79ad29a14e30f7f9fb9a25" width="24" height="36" alt="HTML Academy"></a><nav class="main-nav main-nav--mini" role="navigation"><div class="main-nav__course-nav"><a class="main-nav__course-item main-nav__course-button main-nav__course-button--prev" href="/courses/javascript-basics/conditions-creating-elements/news-comments">Comments for the news site</a><div class="main-nav__course-item main-nav__course-list main-nav__course-list--collapsed"><b class="main-nav__course-title">Conditions and creating elements</b><span class="main-nav__course-stat">9/16</span><div class="main-nav__course-contents"><a class="main-nav__course-contents-link" href="/courses/javascript-basics/conditions-creating-elements">Back to the list of tasks</a><ul class="main-nav__course-contents-list"><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/include-script">1. Include the second script</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/create-counter">2. Creating a like counter</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/change-counter-value">3. Changing the counter value</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/classlist-contains-method">4. The classList.contains method, checking for the existence of the class</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/if-statement">5. The conditional statement if</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/else-statement">6. The else statement, alternative branches</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/change-value-from-markup">7. Change the value from the markup</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/news-comments">8. Comments for the news site</a></li><li class="main-nav__course-contents-item main-nav__course-contents-item--current"><a href="/courses/javascript-basics/conditions-creating-elements/append-method">9. The append method, adding content</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/create-element-method">10. The CreateElement method and creating an element</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/add-element-to-page">11. Adding an element to the page</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/submit-form">12. Add a comment when submitting the form</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/change-element-properties">13. Changing the properties of the created element</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/finish-comments">14. Finishing the comment section</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/summary">15. Summary of “Conditions and creating elements”</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/conditions-creating-elements/task-list">16. Test: Task list</a></li></ul></div></div><a class="main-nav__course-item main-nav__course-button main-nav__course-button--next" href="/courses/javascript-basics/conditions-creating-elements/create-element-method">The CreateElement method and creating an element</a></div><ul class="main-nav__list main-nav__list--user main-nav__list--user-guest"><li class="main-nav__item" itemprop="name"><a class="main-nav__link" href="/signup?redirect_url=%2Fcourses%2Fjavascript-basics%2Fconditions-creating-elements%2Fappend-method" title="Sign up" data-modal="open" data-value="register" itemprop="url"><span class="main-nav__icon" aria-hidden="true"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#user"></use></svg></span>Sign up</a></li><li class="main-nav__item main-nav__item--login" itemprop="name"><a class="main-nav__link" href="/login?redirect_url=%2Fcourses%2Fjavascript-basics%2Fconditions-creating-elements%2Fappend-method" title="Log in" data-modal="open" data-value="login" 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3.896.106.328.5.46.78.26.273.192.653.06.745-.26.735-2.66-1.6-5.728-3.766-7.16z" fill="#F1662A"/></svg></span><p class="course-loading-overlay__message"><b class="course-loading-overlay__message-title">Loading…</b><br><span class="course-loading-overlay__message-text">Everything will be ready in few seconds</span></p></div></div><div class="course-layout__sidebar course-theory"><div class="course-theory__inner course-theory__inner--left-stub"><button class="course-theory__close icon-close icon-close--light" type="button">Close</button><ul class="course-tabs course-tabs--non-interactive course-layout__theory-heading js--theory-tabs"><li class="course-tabs__item course-tabs__item--external course-tab course-tab--centered"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered course-tab--active js--theory-tab__theory"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered js--theory-tab__comments"><span class="course-tab__icon"><svg aria-hidden="true" style="width: 16px; height: 16px; fill: #2e2c9c;"><use xlink:href="/img/sprites/up.svg#comment"></use></svg></span><span class="course-tab__title">Comments</span></li></ul><section class="course-theory__content"><div class="js--theory-pane__theory course-theory__content-inner"><h1 class="course-theory__content-heading">The append method, adding content</h1><div class="course-theory__content-text"><p>We changed the text content of the <code>commentList</code> element, and we also deleted the comment that was already in the comment section. This happened because the new value <code>textContent</code> rewrites the entire contents of the element. This means that we cannot use it for a lively discussion in the comments section. New comments must be added to the end of the comment section after old comments. The <code>append</code> method can help us to do this. It is used as follows:</p><pre><code>The parent element.<mark>append</mark>(item added);</code></pre><p>The <code>append</code> method adds the element in parentheses to the end of the parent element. However, the contents of the parent element are not overwritten. You can use this method to add elements and simple strings.</p><p>Imagine that we have the following markup on a page:</p><pre><code><p>It's good to be a cat.</p></code></pre><p>Find this paragraph and use the <code>append</code> method:</p><pre><code>let paragraph = document.querySelector('p');
paragraph.<mark>append</mark>('And it is even better to be a developer!');</code></pre><p>When the command is executed, the markup will look like this in the user’s browser:</p><pre><code><p>It's good to be a cat. And it's even better to be a developer!</p></code></pre><p>The new line is added to the end of the element without deleting anything. This is what you need for new comments! To verify this, use the <code>append</code> method and add a line to the end of the comment section.</p></div></div><div class="js--theory-pane__comments hidden course-theory__content-inner"><div class="course-theory__content-text"><h2 class="course-theory__content-heading">Comments</h2><div id="disqus_thread"></div><script>
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<h1 class="inner-heading">🔥 What shocking news! It’s so scandalous! Such a sensation!</h1>
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<time datetime="2019-12-22">22 December 2019</time>
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<p>It turns out that you don’t have to be a cat to start programming in JavaScript! Scientists have created the first robot that can write and change its own code. He immediately learned how to code websites, and he left to work as a freelancer on Bali.</p>
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.dark-theme .main-menu {
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.dark-theme .main-menu a:focus {
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.dark-theme .main-menu a:focus,
.dark-theme .main-menu a:hover {
background-color: #6653d9;
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.dark-theme .news-view button {
border: 1px solid #9484f2;
color: #9484f2;
}
.dark-theme .news-view button:focus {
outline-color: #6653d9;
}
.dark-theme .news-view button:focus,
.dark-theme .news-view button:hover,
.dark-theme .news-view button:active,
.dark-theme .news-view .view-checked {
background-color: #9484f2;
color: #17161a;
}
.dark-theme .news-view .row-view:focus::before,
.dark-theme .news-view .row-view:hover::before,
.dark-theme .news-view .row-view:active::before {
background-image: url("img/rows-dark-checked.svg");
}
.dark-theme .news-view .tile-view:focus::before,
.dark-theme .news-view .tile-view:hover::before,
.dark-theme .news-view .tile-view:active::before {
background-image: url("img/tiles-dark-checked.svg");
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.dark-theme .row-view::before {
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.dark-theme .tile-view::before {
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.dark-theme .row-view.view-checked::before {
background-image: url("img/rows-dark-checked.svg");
}
.dark-theme .tile-view.view-checked::before {
background-image: url("img/tiles-dark-checked.svg");
}
.dark-theme .new-block {
background-color: #2a2930;
box-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
}
.dark-theme .news-full {
background-color: #2a2930;
box-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
}
.dark-theme .new-block time {
color: #888888;
}
.dark-theme .news-full time {
color: #888888;
}
.dark-theme .cookies-agreement {
background-color: #473c8d;
box-shadow: 0 -1px 4px rgba(0, 0, 0, 0.6);
}
.dark-theme .button {
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color: #17161a;
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.dark-theme .button:hover {
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box-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
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color: #f2f2f2;
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.dark-theme .comment-list li {
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.dark-theme .user-comment:not(:first-child) {
animation: comment-blink-dark 600ms ease-in;
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.dark-theme .comment-field:focus {
outline-color: #6653d9;
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</div><div
class="js--file"
data-visible="true"
data-active="true"
data-enabled="true"
data-title="comments.js"
data-mode="js"
data-src="comments.js"
data-selection="[3,0,3,50]"
data-scroll-to=""
data-left-url-part=""
data-right-url-part=""
data-right-url-part-active="false"
data-browser-tab="false"
data-browser-tab-name=""
data-browser-tab-active="false"
data-browser-scroll="">let commentForm = document.querySelector('.comment-form');
let commentList = document.querySelector('.comment-list');
commentList.textContent = 'New comment';
commentForm.onsubmit = function (evt) {
evt.preventDefault();
};
</div><div
class="js--file"
data-visible="false"
data-active="false"
data-enabled="false"
data-title="themes.js"
data-mode="js"
data-src="themes.js"
data-selection=""
data-scroll-to=""
data-left-url-part=""
data-right-url-part=""
data-right-url-part-active="false"
data-browser-tab="false"
data-browser-tab-name=""
data-browser-tab-active="false"
data-browser-scroll="">let page = document.querySelector('.page');
let themeButton = document.querySelector('.theme-button');
themeButton.onclick = function () {
page.classList.toggle('light-theme');
page.classList.toggle('dark-theme');
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</div><div
class="js--file"
data-visible="false"
data-active="false"
data-enabled="false"
data-title="likes.js"
data-mode="js"
data-src="likes.js"
data-selection=""
data-scroll-to=""
data-left-url-part=""
data-right-url-part=""
data-right-url-part-active="false"
data-browser-tab="false"
data-browser-tab-name=""
data-browser-tab-active="false"
data-browser-scroll="">let heart = document.querySelector('.heart');
let likesNumber = document.querySelector('.likes-number');
heart.onclick = function () {
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likesNumber.textContent--;
} else {
likesNumber.textContent++;
}
heart.classList.toggle('added');
};
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Note how the new line appeared after the old comment.</li></ol></div></div></div></div></article></div><div class="course-interface__overlay course-interface__overlay--active"></div></main><script
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