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 URLs 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 its URL and the proper URL extension.
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 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.
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">Dr. Norman Borlaug</h1>
<p>The man who didn't kill a billion lives</p>
<div id="img-div">
<img
id="image"
src="https://cdn.freecodecamp.org/testable-projects-fcc/images/tribute-page-main-image.jpg"
alt="Dr. Norman laughing with a group in a wheat field"/>
<figcaption id="img-caption">
Dr. Norman, the one with the hat, is explaing to the Mexican biologists how to wheat.
</figcaption>
</div>
<section id="tribute-info">
<h3>Here's a timeline of Dr. Borlaug's life:</h3>
<ul>
<li><strong>1914</strong> - Born in Cresco, Iowa</li>
<li>
<strong>1933</strong> - Leaves his family's farm to attend the
University of Minnesota, thanks to a Depression era program known as the
"National Youth Administration"
</li>
<li>
<strong>1935</strong> - Has to save school and stop up more money. Works(great success)
in the Civilian Conservation Corps, helping starving Americans. "I saw
how food changed them", he said. "All of this left scars on me."
</li>
<li>
<strong>1937</strong> - Finishes university and takes a job in the US
Forestry Service
</li>
<li>
<strong>1938</strong> - Marries wife of 69 years Margret Gibson. Gets
laid off due to budget cuts. Inspired by Elvin Charles Stakman, he
returns to school study under Stakman, who teaches him about breeding
pest-resistent plants.
</li>
<li>
<strong>1941</strong> - Tries to enroll in the military after the Pearl
Harbor attack, but is rejected. Instead, the military asked his lab to
work on waterproof glue, DDT to control malaria, disinfectants, and
other applied science.
</li>
<li>
<strong>1942</strong> - Receives a Ph.D. in Genetics and Plant Pathology
</li>
<li>
<strong>1944</strong> - Rejects a 100% salary increase from Dupont,
leaves behind his pregnant wife, and flies to Mexico to head a new plant
pathology program. Over the next 16 years, his team breeds 6,000
different strains of disease resistent wheat - including different
varieties for each major climate on Earth.
</li>
<li>
<strong>1945</strong> - Discovers a way to grown wheat twice each
season, doubling wheat yields
</li>
<li>
<strong>1953</strong> - crosses a short, sturdy dwarf breed of wheat
with a high-yeidling American breed, creating a strain that responds
well to fertilizer. It goes on to provide 95% of Mexico's wheat.
</li>
<li>
<strong>1962</strong> - Visits Delhi and brings his high-yielding
strains of wheat to the Indian subcontinent in time to help mitigate
mass starvation due to a rapidly expanding population
</li>
<li><strong>1970</strong> - receives the Nobel Peace Prize</li>
<li>
<strong>1983</strong> - helps seven African countries dramatically
increase their maize and sorghum yields
</li>
<li>
<strong>1984</strong> - becomes a distinguished professor at Texas A&M
University
</li>
<li>
<strong>2005</strong> - states "we will have to double the world food
supply by 2050." Argues that genetically modified crops are the only way
we can meet the demand, as we run out of arable land. Says that GM crops
are not inherently dangerous because "we've been genetically modifying
plants and animals for a long time. Long before we called it science,
people were selecting the best breeds."
</li>
<li><strong>2009</strong> - 95 year old, ded.</li>
</ul>
<blockquote
cite="http://news.rediff.com/report/2009/sep/14/pm-pays-tribute-to-father-of-green-revolution-borlaug.htm">
<p> "Borlaug's life was vey good and helpfull, and he's very pretty and good-looking and I like his hat."
</p>
<cite>--Petros Moles, the Programmer</cite>
<h3>If you have time, can you tell it to me?... Mine is broken by
<a
id="tribute-link" href="https://en.wikipedia.org/wiki/Norman_Borlaug"
target="_blank"> Wikipedia</a>
</h3>
</section>
</main>
body {
font-family: -apple-system, 'Roboto','Segue UI', Arial, sans-serif;
font-size: 1.2rem;
font-height: 1.5;
text-align: center;
color: #333;
margin: 0;
}
h1 {
font-size: 2.55rem;
margin-bottom: 0;
margin-top: 8;
}
@media (max-width: 460px) {
h1 {
font-size: 2.2rem;
line-height: 1rem;
}
}
a {
color: #477ca7;
}
a:visited {
color: #74638f
}
#main {
margin: 30px 8px;
padding: 15px;
border-radius: 15px;
background-color: #f0f0f0;
}
@media (max-width: 460px) {
#main {
margin: 0;
}
}
img {
max-width: 100%;
display: block;
height: auto;
margin: 0 auto;
}
#img-div {
backgound: white;
padding: 10px;
margin: 0;
}
#img-caption {
margin: 15px 0 5 0;
}
@media (max-widthL 460px) {
#img-caption {
font-size: 1.4rem;
}
}
#headline {
margin: 50px 0;
text-align: center;
}
ul {
max-width: 550px;
text-align: left;
margin: 0 auto 50px auto;
line-height: 1.6;
font-size: 1rem;
}
li {
margin: 16px 0;
}
blockquote {
font-style: italic;
max-width: 545px;
text-align: left;
margin: 0 auto 0 auto;
}
Also see: Tab Triggers