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About HTML Preprocessors

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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In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

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

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

You can also link to another Pen here, and we'll pull the CSS from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

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You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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About External Resources

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.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

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HTML Settings

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HTML

            
              <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 50 600 450" opacity="0">
  <line x1="150" x2="450" y1="300" y2="300" fill="none" stroke="#333" stroke-width="48" stroke-linecap="round"/>
  <line x1="150" x2="450" y1="300" y2="300" fill="none" stroke="#222" stroke-width="30" stroke-linecap="round"/>
  <path stroke-dashoffset="833" stroke-dasharray="834 834" stroke-linecap="round" fill="none" fill-rule="evenodd" stroke="#8ADB2C" stroke-width="18" d="M150,300c0,0,138,0,198,0c112,0,66-122,15-165c-43.9-37-92-10-79,33c7.7,25.5,51.6,47.6,99,36c139-34,67,96,67,96" />
  <text fill="#FFF" transform="translate(145.615 266.265)" font-family="sans-serif" font-size="31">
    loading...
  </text>
  <polygon fill="#FFA06C" points="434 278 424 205 459 286 498 234 479 298 538 275 484 320 542 349 462 335 462 394 439 318 372 356 427 299 372 260" />
  <polygon fill="#FFE45F" points="414 252 440 299 497 233 479 287 529 283 498 315 539 334 476 329 503 382 448 329 432 382 426 317 372 333 420 299" />
  <polygon fill="#FFF" points="434.1 303.9 428.3 261.2 451.7 290.5 457.6 265.4 468.5 296.4 528 252 481.9 303.9 517.1 312.3 469.3 316.5 509.6 341.6 462.6 336.6 458.4 376 443.3 319.8 417.4 357.6 426.6 314 383 298.9" />
</svg>
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CSS

            
              body{
	margin:0;
	background:#222;
}
svg{
	width:100%;
	height:100%;
	position:fixed;
}
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JS

            
              var path = document.querySelector("path");
var length = path.getTotalLength();
// create timeline
var timeline = new TimelineMax({
	repeat: -1,
	repeatDelay: 1
});

// initial animation of svg
TweenMax.to("svg", 0.5, {
	opacity: 1
});

// set up looping text animation
TweenMax.to("text", 0.5, {
	opacity: .2,
	yoyo: true,
	repeat: -1,
	ease: Sine.easeInOut
});

// path animation
timeline.from(path, 1, {
	autoAlpha: 0,
	ease: Power2.easeOut
});
timeline.to(path, 2, {
	attr: {
		"stroke-dashoffset": 0
	},
	ease: Quint.easeIn
}, 0);


// Explosion
timeline.staggerFrom("polygon", .2, {
		scale: 0,
		transformOrigin: "center",
		ease: Back.easeOut
	}, .05, 2);
	timeline.staggerTo("polygon", 0.5, {
		cycle: {
			rotation: [-90, 90]
		},
		transformOrigin: "center"
	}, 0, 2);
	timeline.staggerTo("polygon", .5, {
		autoAlpha: 0,
		transformOrigin: "center",
		ease: Back.easeOut
	}, -.05, 2 + "+=.4");

// remove path
timeline.to(path, 2, {
	attr: {
		"stroke-dashoffset": -length
	},
	autoAlpha: 0,
	ease: Quint.easeInOut
}, 2);
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