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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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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-.

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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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Packages

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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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Using packages here is powered by Skypack, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ES6 import usage.

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HTML 

              
                <figure class="u-glue-parent o-block">
	<figcaption class="u-glue c-tag" data-glue-corner="top right">Caption</figcaption>
	<figcaption class="u-glue c-tag2" data-glue-corner="top left">Caption</figcaption>
	<img class="o-block__image" src="https://picsum.photos/350/200" />
</figure>
!

CSS 

              
                // Read more here: https://notlaura.com/u-glue/

// Note: this is algorithm relies only on features native to vanilla CSS. 
// SCSS syntax is enabled for inline comments and light nesting.

// ----
// Begin the .u-glue algorithm/API/pattern thing
// ----

.u-glue-parent {
	position: relative;
}

.u-glue {
	position: absolute;

	// We don't actually *need* rulesets for "top" nor "left" 
	// because they are the defaults! However, depending on 
	// other styles applies to these elements, top and left
	// may be necessary to reset the box's position.
	&[data-glue-corner*="top"] {
		top: 0;
	}

	&[data-glue-corner*="left"] {
		left: 0;
	}

	&[data-glue-corner*="bottom"] {
		bottom: 0;
	}

	&[data-glue-corner*="right"] {
		right: 0;
	}

	
	@supports( --color: blue ) {
		// Create a custom property to be set in the project using .u-glue.
		// Browsers who don't support this, won't get this.
		transform: var(--u-glue__transform, initial);
	}
}



// ----
// Consuming the .u-glue API/algorithm/thing.
// These are styles local to the project that includes .u-glue.
// ----

.o-block {
	max-width: 500px;
	margin-top: 2rem;
	margin-left: auto;
	margin-right: auto;
	
	// Flex is used here for making the image size relative to it's container.
	display: flex; 
}

.o-block__image {
	width: 100%;
}

.c-tag {
	--u-glue__transform: translate( 50%, 50% );
	
	background-color: coral;
	padding: 0.5rem;
	color: white;
	border: 2px solid navy;
}

.c-tag2 {
	--u-glue__transform: translate( -50%, -50% );
}
!

JS
!
999px

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