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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

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About the <head>

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Insecure Resource

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

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Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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About Packages

Using packages here is powered by esm.sh, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ESM usage.

All packages are different, so refer to their docs for how they work.

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HTML 

              
                <main>
	<header>
		<h1>Individual CSS Transform Properties Demo</h1>
	</header>
	<div class="warning">
		<p>⚠️ Your browser does not support <a href="https://drafts.csswg.org/css-transforms-2/#individual-transforms">Individual CSS Transform Properties</a> so this demo won't work properly. Please try Firefox 72 or Safari 14.1 or Chrome 104</p>
	</div>
	<div class="demowrapper">
		<div class="blockwrapper">
			<div class="block">no transform</div>
		</div>
		<div class="blockwrapper">
			<div class="block transform--legacy">legacy<br />(for reference)</div>
		</div>
		<div class="blockwrapper">
			<div class="block transform--individual">individual</div>
		</div>
		<div class="blockwrapper">
			<div class="block transform--transition">individual + transition</div>
		</div>
		<div class="blockwrapper">
			<div class="block transform--animation">individual + animation</div>
		</div>
	</div>
	<!--
	<footer>
		<p><em><a href="https://www.bram.us/2020/01/09/firefox-72-individual-transform-properties/">https://www.bram.us/2020/01/09/firefox-72-individual-transform-properties/</a></em></p>
	</footer>
	-->
</main>
!

CSS 

              
                /** legacy CSS transform **/
.transform--legacy {
	transform: translateX(50%) rotate(30deg) scale(1.2);
}

/** Individual CSS transform properties **/
.transform--individual {
	scale: 1.2;
	rotate: 30deg;
	translate: 50% 0;
}

/** Individual CSS transform properties + transition **/
.transform--transition {
	transition: rotate 200ms ease-in-out, scale 500ms linear;
}
.transform--transition:hover {
	scale: 1.2;
	rotate: 30deg;
	translate: 50% 0;
}

/** Individual CSS transform properties + animation **/
@keyframes anim {
	25% {
		translate: 50% 0;
	}
	50% {
		rotate: 30deg;
	}
	75% {
		scale: 1.2;
	}
}

.transform--animation {
	animation: anim 3s alternate infinite;
}

/** show a warning in browers that don't support it **/
.warning {
	padding: 1em;
	border: 1px solid #ccc;
}

.warning p {
	margin: 0;
	padding: 0;
}

@supports (scale: 1) {
	.warning {
		display: none;
	}
}

/** default block styles **/

* {
	display: border-box;
}

body, .demowrapper {
	display: flex;
	justify-content: center;
	align-items: center;
}

.demowrapper {
	flex-direction: column;	
}

header, footer {
	text-align: center;
}

.blockwrapper {
	width: 10em;
	height: 10em;
	border-radius: 0.5em;
	margin: 4em;
	border: 0.2em dotted lightblue;
	text-align: center;
}

.block {
	width: 10em;
	height: 10em;
	border-radius: 0.5em;
	background: #ccc;
	border: 1px solid #666;

	opacity: 0.6;

	display: flex;
	align-items: center;
	justify-content: center;
}
!

JS
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999px

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