All we have left to do is process the last two properties from the upload: isSpecial and specialPrice. The isSpecial property contains true if the product is covered by the special offer. The special-offer product gets a new price, which is stored in specialPrice.
You have already solved a similar task: special-offer cards should get an additional class product--special. But now you also need to show a special price. It should be in a paragraph with class product__special-price. This paragraph should be the last child element in the card.
The order of actions is as follows:
- check whether the product is covered by special offer;
- if the check goes through, add a class to the product card,
- and also add another paragraph with the corresponding class and text from the specialPrice property into the card.
After we are done, let’s test the function once again. In the data object, change the value of the isSpecial to true and specialPrice to 300 (value null means “nothing” or, if applied closer to our real-life scenario, “there are no special prices”). If everything is done correctly, the appearance of the card will change.
Why did the price change from 200 to 300? Because this way the skillful marketer Muffin can interpret the special offer.
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What if I find one?</a><div class="main-nav__course-item main-nav__course-list main-nav__course-list--collapsed"><b class="main-nav__course-title">Introduction to JavaScript in the browser</b><span class="main-nav__course-stat">20/23</span><div class="main-nav__course-contents"><a class="main-nav__course-contents-link" href="/courses/javascript-browser/browser-intro">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-browser/browser-intro/add-script">1. Script to start!</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-browser/browser-intro/query-selector">2. Ready or not, here I come</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-browser/browser-intro/classlist-add">3. First class</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-browser/browser-intro/query-selector-all">4. 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fill="#EFA75B"/><path d="M31.963 50.968c-.197-.004-.358-.157-.372-.353-.018-.207.158-.378.364-.354 3.245-.26 3.505-2.156 3.608-2.25-.006-.19.183-.325.362-.26.193.01.35.16.363.354 0 .084 0 1.906 3.422 2 .192.008.348.16.362.353-.018.19-.172.34-.363.353-1.352.11-2.68-.4-3.61-1.386-.095-.096-.16-.22-.185-.353-.982 1.174-2.423 1.866-3.952 1.898z" fill="#151841"/><path d="M32.14 43.427c.186-.52 3.608.083 3.608.083s2.975-.688 3.422.084c-.05.288-.175.557-.363.78-.515-.056-1.037.004-1.525.178-.333.61-.488 1.304-.446 2-.222.394-.574.7-.995.864-.398-.112-.75-.354-.994-.688.047-.75-.146-1.496-.55-2.13-.27-.26-1.264.084-1.626-.083l-.53-1.088zm6.89.242c-.05.286-.175.556-.363.78-.503-.063-1.015-.012-1.497.148-.333.612-.487 1.305-.446 2-.222.394-.574.7-.995.864-.4-.112-.75-.354-.996-.688.053-.76-.14-1.515-.55-2.157-.268-.26-1.263.084-1.626-.084-.26-.23-.45-.53-.55-.864" fill="#CF4A27"/><path d="M35.748 47.853c-.587-.226-1.072-.655-1.367-1.21-.022-.634-.144-1.262-.362-1.86h-.567c-.31.073-.636.043-.93-.082-.35-.253-.61-.616-.734-1.03-.082-.17.006-.374.186-.43.172-.083.38 0 .447.177.056.278.215.524.445.69h.586c.37-.086.757-.023 1.08.175.413.585.634 1.284.632 2v.353c.185.177.4.32.632.428.22-.18.42-.382.595-.605-.004-.29.024-.58.083-.865.026-.48.22-.94.55-1.292.506-.235 1.07-.325 1.626-.26.077-.108.14-.227.185-.353-.038-.148.042-.3.186-.353.145-.11.352-.07.447.083.084.084.27.428-.446 1.21-.083.083-.185.176-.27.083-.422-.033-.848-.004-1.264.084-.215.502-.323 1.043-.316 1.59v.176c-.326.57-.824 1.023-1.422 1.293zm-7.198-14.04c-.788-.226-1.61-.314-2.427-.26-1.264 0-2.436.082-2.52.082h-.38v.354s.715 3.55 3.96 3.895c.693.006 1.385-.025 2.074-.093.27-.084 1.71-.428 1.71-.428-.025-1.56-.975-2.956-2.417-3.552zm.53 3.207c-.558.142-1.135.2-1.71.177-1.14-.075-2.16-.728-2.707-1.73-.247-.37-.432-.78-.548-1.21.455 0 1.18-.092 2.073-.175h.596c-.084.688-.242 2.464.483 2.334.725-.13.837-1.46.93-2.13h.112c.937.492 1.647 1.33 1.98 2.334-.388.176-.793.31-1.21.4zm18.365-2.864c-1.104-.145-2.215-.232-3.33-.26-.546-.01-1.093.05-1.626.176-1.166.483-2.08 1.425-2.53 2.604l-.158.79 1.795.623c.558.153 1.132.24 1.71.26h.28c3.245-.177 4.137-3.72 4.137-3.72l.084-.353zm-1.264 1.86c-.54 1.394-2.882 1.646-2.966 1.646-.517-.02-1.03-.11-1.525-.26-.186-.085-.633-.26-1.08-.43.374-.966 1.117-1.746 2.065-2.165 0 .68.158 1.953.81 2.083.65.13.613-1.535.566-2.26.934.005 1.865.064 2.79.177-.11.316-.473.65-.66 1.17z" fill="#151841"/><path d="M19.26 39.27c.535 1.362 1.56 2.473 2.874 3.115.534.312 1.204-.07 1.207-.69.002-.285-.15-.55-.397-.695-.918-.46-1.65-1.222-2.073-2.158-.344-.957-1.972-.52-1.61.428zm29.45 3.125c1.083-.59 2.01-1.428 2.706-2.446.3-.556-.112-1.228-.743-1.21-.293.007-.56.17-.698.428-.568.776-1.306 1.412-2.158 1.86-.394.23-.517.742-.27 1.125.263.376.773.482 1.163.242z" fill="#EFA75B" stroke-width="13"/><path d="M16.025 32.436c1.525-1.386 2.427-4.408 2.79-6.835-.084.354 2.613.43 4.138-1.208 1.078-1.125.446-2-.186-3.375-1.71-3.552-4.585-6.323-7.384-8.918-.716-.69-1.44-2.428-2.706-2-.995.353-.93 3.2-.716 4.073 1.09 7.448 4.065 18.263 4.065 18.263zm37.372-.78c-1.704-1.826-2.822-4.12-3.208-6.585 0 .354-2.614.354-4.056-1.29-.995-1.127-.362-1.86.363-3.117 1.86-3.198 4.863-5.718 7.746-8.136.81-.604 1.627-1.47 2.79-.93.994.428.715 2.334.548 3.115-1.083 5.72-2.48 11.376-4.183 16.943z" fill="#FFF"/><path d="M53.564 20.422c-1.98.51-4.138 1.636-5.105 3.487-.43-2.196 1.645-4.65 3.393-5.832.333-.21.312-.703-.037-.886-.162-.085-.357-.076-.512.022-2.157 1.562-4.417 4.5-3.784 7.188.076.262.354.41.614.325l-.075.28c-.085.603.93.864.994.26.446-2.158 2.706-3.376 4.77-3.897.372-.076.522-.526.27-.81-.133-.15-.342-.204-.53-.138zM17.457 18.06c-.55-.354-.995.428-.55.865 1.433 1.004 3.182 3.05 3.395 4.956-.93-1.86-3.05-2.975-5.105-3.486-.386-.005-.633.41-.445.747.042.076.103.14.176.184 2.073.52 4.324 1.73 4.77 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">Special offer</h1><div class="course-theory__content-text"><p>All we have left to do is process the last two properties from the upload: <code>isSpecial</code> and <code>specialPrice</code>. The <code>isSpecial</code> property contains <code>true</code> if the product is covered by the special offer. The special-offer product gets a new price, which is stored in <code>specialPrice</code>.</p><p><a href="check-special">You have already solved</a> a similar task: special-offer cards should get an additional class <code>product--special</code>. But now you also need to show a special price. It should be in a paragraph with class <code>product__special-price</code>. This paragraph should be the last child element in the card.</p><p>The order of actions is as follows:</p><ol><li>check whether the product is covered by special offer;</li><li>if the check goes through, add a class to the product card, </li><li>and also add another paragraph with the corresponding class and text from the <code>specialPrice</code> property into the card.</li></ol><p>After we are done, let’s test the function once again. In the data object, change the value of the <code>isSpecial</code> to <code>true</code> and <code>specialPrice</code> to <code>300</code> (value <code>null</code> means “nothing” or, if applied closer to our real-life scenario, “there are no special prices”). If everything is done correctly, the appearance of the card will change.</p><p><em>Why did the price change from 200 to 300? Because this way the skillful marketer Muffin can interpret the special offer.</em></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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</script><noscript>Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript></div></div></section><div class="course-theory__controls"><button class="button button--close" type="button">To the task</button></div></div></div><div class="course-layout__column course-layout__column--left"><ul class="js--course-tabs course-tabs course-layout__course-tabs"><li class="js--editor-tab course-tabs__item course-tab course-tabs__item--limited course-tabs__item--limited-large course-tab--active" data-editor="html"><span class="course-tab__title course-tab__title--indent"><span class="course-tab__title-part course-tab__title-part--active">index.html</span></span><button class="js--editor-split course-tab__button course-tab__button--split" type="button"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-split"></use></svg><span class="tooltip tooltip--light tooltip--to-top tooltip--with-wrap tooltip--short course-tab__tooltip"><span class="tooltip__wrap">Split mode</span></span></button></li><li class="js--editor-tab course-tabs__item course-tab course-tabs__item--limited course-tabs__item--limited-large" data-editor="css"><span class="course-tab__title course-tab__title--indent"><span class="course-tab__title-part course-tab__title-part--active">style.css</span></span><button class="js--editor-split course-tab__button course-tab__button--split" type="button"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-split"></use></svg><span class="tooltip tooltip--light tooltip--to-top tooltip--with-wrap tooltip--short course-tab__tooltip"><span class="tooltip__wrap">Split mode</span></span></button></li><li class="js--editor-tab course-tabs__item course-tab course-tabs__item--limited course-tabs__item--limited-large" data-editor="js"><span class="course-tab__title course-tab__title--indent"><span class="course-tab__title-part course-tab__title-part--active">script.js</span></span><button class="js--editor-split course-tab__button course-tab__button--split" type="button"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-split"></use></svg><span class="tooltip tooltip--light tooltip--to-top tooltip--with-wrap tooltip--short course-tab__tooltip"><span class="tooltip__wrap">Split mode</span></span></button></li></ul><div class="course-layout__editors"><div class="js--editor course-editor course-layout__editor" id="" data-tab="html" data-split=""><span class="course-editor__label"><span class="course-editor__label-item">HTML</span><button class="course-editor__label-item course-editor__label-item--interactive hidden js--editor__unsplit-button course-editor__label-item--simple" title="No split" type="button"><svg width="7" height="10" viewBox="0 0 7 10" xmlns="http://www.w3.org/2000/svg"><g stroke="currentColor" fill="none" fill-rule="evenodd"><path stroke-linecap="round" d="M.6 3.503L3.443.518l2.842 2.985"></path><path d="M3.5 1.5v7.16" stroke-linecap="square"></path></g></svg></button></span><div class="course-editor__item" id="html-editor"><!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Catalog | Device</title>
<link rel="stylesheet" href="device/setting.css">
<link rel="stylesheet" href="style.css">
</head>
<body>
<ul class="products">
</ul>
<script src="script.js"></script>
</body>
</html>
</div></div><div class="js--editor course-editor course-layout__editor course-editor--hidden" id="" data-tab="css" data-split=""><span class="course-editor__label"><span class="course-editor__label-item">CSS</span><button class="course-editor__label-item course-editor__label-item--interactive hidden js--editor__unsplit-button course-editor__label-item--simple" title="No split" type="button"><svg width="7" height="10" viewBox="0 0 7 10" xmlns="http://www.w3.org/2000/svg"><g stroke="currentColor" fill="none" fill-rule="evenodd"><path stroke-linecap="round" d="M.6 3.503L3.443.518l2.842 2.985"></path><path d="M3.5 1.5v7.16" stroke-linecap="square"></path></g></svg></button></span><div class="course-editor__item" id="css-editor">.products {
display: flex;
flex-wrap: wrap;
justify-content: space-between;
width: 570px;
margin: 20px auto;
padding: 0;
list-style: none;
}
.product {
position: relative;
display: flex;
flex-wrap: wrap;
justify-content: space-between;
width: 270px;
margin-bottom: 30px;
}
.product__image {
order: -1;
width: 270px;
height: 380px;
margin-bottom: 15px;
}
.product__title {
max-width: 180px;
margin: 0;
font-weight: 500;
font-size: 18px;
line-height: 24px;
}
.product__price {
max-width: 80px;
margin: 0;
text-align: right;
font-weight: 300;
font-size: 16px;
line-height: 27px;
}
.product--special {
order: -1;
width: 100%;
height: 380px;
flex-direction: column;
justify-content: flex-start;
align-content: space-between;
}
.product--special .product__title {
width: 270px;
max-width: 100%;
margin-bottom: 10px;
font-size: 28px;
line-height: 36px;
}
.product--special .product__price {
width: 270px;
max-width: 100%;
text-align: left;
text-decoration: line-through;
color: #cccccc;
}
.product--special .product__special-price {
margin: 0;
}
.product--special .product__image {
outline: 3px solid #ffc600;
}
.product--special::before {
content: "Product of the day";
position: absolute;
top: 0;
left: 0;
display: flex;
justify-content: center;
align-items: center;
padding: 5px 10px;
font-weight: 500;
color: #111111;
text-transform: uppercase;
background-color: #ffc600;
}
.product--available::after,
.product--unavailable::after {
position: absolute;
top: 343px;
left: 50%;
padding: 10px 5px 2px 5px;
border-bottom: 1px solid #57c74b;
transform: translateX(-50%);
}
.product--available::after {
content: "In stock";
}
.product--unavailable {
filter: grayscale(1) opacity(0.7);
}
.product--unavailable::after {
content: "Out of stock";
}
.product--special.product--available::after,
.product--special.product--unavailable::after {
left: 135px;
}
</div></div><div class="js--editor course-editor course-layout__editor course-editor--hidden" id="" data-tab="js" data-split=""><span class="course-editor__label"><span class="course-editor__label-item">JavaScript</span><button class="course-editor__label-item course-editor__label-item--interactive hidden js--editor__unsplit-button course-editor__label-item--simple" title="No split" type="button"><svg width="7" height="10" viewBox="0 0 7 10" xmlns="http://www.w3.org/2000/svg"><g stroke="currentColor" fill="none" fill-rule="evenodd"><path stroke-linecap="round" d="M.6 3.503L3.443.518l2.842 2.985"></path><path d="M3.5 1.5v7.16" stroke-linecap="square"></path></g></svg></button></span><div class="course-editor__item" id="js-editor">var makeElement = function (tagName, className, text) {
var element = document.createElement(tagName);
element.classList.add(className);
if (text) {
element.textContent = text;
}
return element;
};
var createCard = function (product) {
var listItem = makeElement('li', 'product');
var title = makeElement('h2', 'product__title', product.text);
listItem.appendChild(title);
var picture = makeElement('img', 'product__image');
picture.src = product.imgUrl;
picture.alt = product.text;
listItem.appendChild(picture);
var price = makeElement('p', 'product__price', product.price);
listItem.appendChild(price);
var availabilityClass = 'product--available';
if (!product.isAvailable) {
availabilityClass = 'product--unavailable';
}
listItem.classList.add(availabilityClass);
return listItem;
};
var cardList = document.querySelector('.products');
var productInfo = {
isAvailable: true,
imgUrl: 'device/item-1.jpg',
text: 'Selfie stick for beginners',
price: 200,
isSpecial: false,
specialPrice: null
};
var cardItem = createCard(productInfo);
cardList.appendChild(cardItem);
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</p></div><div class="course-browser__menu course-browser__menu--vertical"><button class="course-browser__menu-item course-browser__menu-button course-browser__menu-button--increase" type="button" disabled title="Larger"><span class="course-browser__menu-item-inner">Larger</span></button><span class="course-browser__menu-item course-browser__zoom"><span class="course-browser__menu-item-inner">100%</span></span><button class="course-browser__menu-item course-browser__menu-button course-browser__menu-button--decrease" type="button" title="Smaller"><span class="course-browser__menu-item-inner">Smaller</span></button></div></div><div class="console console--modal console--modal-collapsed js--console"><div class="console__heading"><span class="console__heading-title">Console<span class="console__counter hidden js--console__counter"></span></span><button class="console__heading-button js--console__toggle" type="button" title="Switch console"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-collapse"></use></svg></button></div><div class="console__content js--console__content"></div></div><div class="course-goals js--goals"><div class="course-goals__heading"><span class="course-goals__heading-title"><span class="course-goals__count-label">Goals</span><span class="course-goals__count">completed</span></span><div class="js--annotations course-task-stats course-task-stats--disabled course-task-stats--centered "><span class="course-task-stats__indicator"><svg width="12" height="12" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg"><path fill-rule="evenodd" clip-rule="evenodd" d="M15 8C15 11.866 11.866 15 8 15C4.13403 15 1 11.866 1 8C1 4.13403 4.13403 1 8 1C11.866 1 15 4.13403 15 8ZM16 8C16 12.4183 12.4183 16 8 16C3.58173 16 0 12.4183 0 8C0 3.58173 3.58173 0 8 0C12.4183 0 16 3.58173 16 8ZM6.7287 3.88849C6.6958 3.59229 6.92761 3.33325 7.22565 3.33325H8.77502C9.07306 3.33325 9.30487 3.59229 9.27197 3.88849L8.71643 8.88849C8.68829 9.14166 8.47424 9.33325 8.21948 9.33325H7.78119C7.52643 9.33325 7.31238 9.14166 7.28424 8.88849L6.7287 3.88849ZM9.33368 12.0001C9.33368 12.7365 8.73669 13.3334 8.00031 13.3334C7.26392 13.3334 6.66699 12.7365 6.66699 12.0001C6.66699 11.2637 7.26392 10.6667 8.00031 10.6667C8.73669 10.6667 9.33368 11.2637 9.33368 12.0001Z" fill="currentColor"></path></svg><span class="js--annotations-counter course-task-stats__counter">0</span></span><div class="course-task-stats__scroller-wrapper"><div class="course-task-stats__scroller"><ul class="js--annotations-list course-task-stats__list"></ul></div></div></div><button class="course-goals__button course-goals__button--expand js--goals__expand" type="button"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-collapse"></use></svg></button><a class="course-goals__button course-goals__button--next button button--green button--without-border hidden" href="/courses/javascript-browser/browser-intro/add-cycle" title="Start the conveyor"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#arrow-white--mini"></use></svg></a></div><div class="course-goals__content"><ol class="course-goals__list"><li class="course-goals__list-item">In the <code>createCard</code> function before <code>return</code>, add a check to make sure that the product is covered by the special offer.</li><li class="course-goals__list-item">If the condition is met, add the <code>product--special</code> class to the product card.</li><li class="course-goals__list-item">Below in the condition, create a variable <code>specialPrice</code> and write in it a paragraph with the price of the special offer created with <code>makeElement</code>.</li><li class="course-goals__list-item">Below in the condition, add element <code>specialPrice</code> to the end of <code>listItem</code>.</li><li class="course-goals__list-item">In the <code>productInfo</code> object, replace <code>isSpecial</code> with <code>true</code> and the value of <code>specialPrice</code> with <code>300</code>.</li></ol></div></div></div></div></article></div><div class="course-interface__overlay course-interface__overlay--active"></div></main><script
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