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.
In CodePen, whatever you write in the HTML editor is what goes within the <body>
tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html>
tag. If you want to add classes there that can affect the whole document, this is the place to do it.
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.
The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.
CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.
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.
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).
Any URL's added here will be added as <link>
s in order, and before the CSS in the editor. You can use the CSS from another Pen by using it's URL and the proper URL extention.
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.
You can also link to another Pen here (use the .css
URL Extension) and we'll pull the CSS from that Pen and include it. If it's using a matching preprocessor, use the appropriate URL Extension and we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.
JavaScript preprocessors can help make authoring JavaScript easier and more convenient.
Babel includes JSX processing.
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.
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.
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.
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.
All packages are different, so refer to their docs for how they work.
If you're using React / ReactDOM, make sure to turn on Babel for the JSX processing.
If active, Pens will autosave every 30 seconds after being saved once.
If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.
If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.
Visit your global Editor Settings.
<main id="main">
<h1 id="title">Elon Musk</h1>
<figure id="img-div">
<img id="image" src="https://upload.wikimedia.org/wikipedia/commons/3/34/Elon_Musk_Royal_Society_%28crop2%29.jpg" alt="Picture of Elon Musk" width="20%" height="20%"/>
<figcaption id="img-caption"> Elon Musk is an entrepreneur, investor, and the world's wealthiest person. He is the founder of SpaceX and The Boring Company, CEO and Product Architect of Tesla, Inc, and also co-founder of Neuralink, and OpenAI. </figcaption> </figure>
<section id="tribute-info">
<h2 id="headline"> Here's a timeline of Elon Musk's life</h2>
<ul>
<li>June 28, 1971, born in Pretoria, South Africa.</li>
<li>Around age 10 he developed an interest in computing and video games and acquired a Commodore VIC-20.</li>
<li>Learned computer programming using a manual, and at age 12, sold the code of a BASIC-based video game he created to <em>PC and Office Technology</em> magazine for approximately $500.</li>
<li>Attended the University of Pretoria for five months while awaiting his passport to Canada.</li>
<li>Arrived in Canada in June 1989 and worked odd jobs at a farm and lumbermill.</li>
<li>Enrolled in Queen's University in Kingston, Ontarion in 1990.</li>
<li>In 1992 transferred to University of Pennsylvania, where he graduated in 1995.</li>
<li>In 1995 he was accepted to a Doctor of Philosophy program at Stanford University. He dropped out of Stanford after two days, deciding instead to join the internet boom and launch an Internet startup.</li>
<li>Started Zip2 with his brother Kimbal and Greg Kouri in 1995. Compaq aquired Sip2 for $307 million in cash in February 1999, and he received $22 million for his share.</li>
<li>Co-founded X.com in 1999. X.com merged wiht Confinity to avoid competition. Confinity had it's own service called PayPal. in 2002 PayPal was acquired by eBay for $1.5 billion in stock, of which he received $175.8 million.</li>
<li>Founded SpaceX in May of 2002. As of 2022, he remains the company's CEO and also holds the title of Chief Engineer</li>
<li>February 2004 he led the Series A round of investment in Tesla, Inc. He invested $6.5 million and become the majority shareholder and joined Tesla's board as chairman.</li>
<li>In 2016 he co-founded Neuralink, a neurotechnology startup company to integrate the human brain with artificial intelligence.</li>
<li>Also in 2016 he founded The Boring company to construct tunnels.</li>
<li>2021 he was the first person with a net worth of over $300 billion</li>
</ul>
<h3>If you would like to read more about Elon Musk check out his <a id="tribute-link" href="https://en.wikipedia.org/wiki/Elon_Musk" target="_blank"> Wikipedia page</a>. </h3>
</section>
</main>
#img-caption {
width: 400px;
height: auto;
display: block;
margin: auto;
}
#image{
max-width: 100%;
height: auto;
display: block;
margin: auto;
}
body {
background-color: black;
color: white;
font-family: calibri;
line-height: 1.5;
text-align: center;
margin: 0;
}
a{
color: blue;
}
a:visited{
color: #477ca7;
}
ul {
max-width: 550px;
margin: 0 auto 50px auto;
text-align: left;
line-height: 1.6;
}
// !! IMPORTANT README:
// You may add additional external JS and CSS as needed to complete the project, however the current external resource MUST remain in place for the tests to work. BABEL must also be left in place.
/***********
INSTRUCTIONS:
- Select the project you would
like to complete from the dropdown
menu.
- Click the "RUN TESTS" button to
run the tests against the blank
pen.
- Click the "TESTS" button to see
the individual test cases.
(should all be failing at first)
- Start coding! As you fulfill each
test case, you will see them go
from red to green.
- As you start to build out your
project, when tests are failing,
you should get helpful errors
along the way!
************/
// PLEASE NOTE: Adding global style rules using the * selector, or by adding rules to body {..} or html {..}, or to all elements within body or html, i.e. h1 {..}, has the potential to pollute the test suite's CSS. Try adding: * { color: red }, for a quick example!
// Once you have read the above messages, you can delete all comments.
Also see: Tab Triggers