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HTML

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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Adding Classes

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.

About the <head>

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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Insecure Resource

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

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).

Add External Stylesheets/Pens

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.

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About External Resources

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.

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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.

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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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.

If you're using React / ReactDOM, make sure to turn on Babel for the JSX processing.

Behavior

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Editor Settings

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HTML 

              
                link(href="https://fonts.googleapis.com/css?family=Ubuntu" rel="stylesheet")
link(href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css", rel="stylesheet", integrity="sha384-T8Gy5hrqNKT+hzMclPo118YTQO6cYprQmhrYwIiQ/3axmI1hQomh7Ud2hPOy8SP1", crossorigin="anonymous")
.profile-card-1
    .img
        img(src="http://blogs.timesofindia.indiatimes.com/wp-content/uploads/2015/12/mark-zuckerberg.jpg")
    a(href="").view-more
        i(class="fa fa-plus-circle" aria-hidden="true")
        .popup
    .mid-section
        .name Mark Zuckerberg
        .description Founder and Owner at 
            a(href="https://facebook.com") Facebook
        .line
        .stats
            .stat 81.3M
                .subtext Followers
            .stat 822k
                .subtext Likes
            .stat 750k
                .subtext Shares
                
    .links
        a(href="").fb
            i(class="fa fa-facebook-f" aria-hidden="true")
        a(href="").twitter
            i(class="fa fa-twitter" aria-hidden="true")
        a(href="").follow
            i(class="fa fa-rocket" aria-hidden="true")
!

CSS 

              
                $main-bg-color: #F2F2F2
$main-color: #2ECC71
$main-bg: linear-gradient(rgba(46,204,113, .4), rgba(46,204,113, .95)), url("https://static.pexels.com/photos/21014/pexels-photo-medium.jpg")
$sub-color: #97e7b9
$grey: #979797
$fb-color: #3b5998
$twitter-color: #55ACEE
$follow-color: $main-color
$top-height: 130px
$bottom-height: 50px
$link-border: lighten($main-color, 6%)
$total-height: 390px
$mid-height: 200px

body
    background: $main-bg-color
    font-family: 'Ubuntu', sans-serif
    
.profile-card-1
    width: 300px
    height: $total-height
    background: white
    margin: 0 auto
    border-radius: 10px
    text-align: center
    box-shadow: 4px 4px 10px #999
    position: relative
    box-sizing: border-box
    overflow: hidden
    .view-more
        position: absolute
        top: calc(50% - .5em)
        left: calc(50% - .5em)
        z-index: 2
        color: $main-color
        font-size: 2em
        .fa-plus-circle
            position: absolute
            background: white
            border-radius: 50%
            width: 1.004em
            &:hover
                background: $main-color
                color: white
    .popup
        height: 500px
        width: 500px
        display: block
        position: absolute
        top: 0
        left: 0

    .mid-section
        position: absolute
        height: $mid-height
        width: 100%
        top: $mid-height
        left: 0
        padding: 10px 20px 0
        box-sizing: border-box
        background: white
        .name
            color: lighten(black, 20%)
            font-size: 1.4em
            padding-top: 5px
            background: rgba(255,255,255,.1)
            font-weight: bold
        .description
            color: lighten(black, 50%)
            font-size: .9em
            padding-bottom: 5px
            background: rgba(255,255,255,.1)
            a
                color: inherit
                text-decoration: none
                font-weight: bold
        .line
            background: lighten($main-color, 20%)
            width: 80%
            height: 2px
            margin: 5px auto -3px
        .stats
            display: flex
            position: absolute
            left: 10%
            padding-top: 10px
            width: 80%
            justify-content: space-around
            .stat
                font-size: 1.3em
                color: lighten(black, 20%)
                padding: 5px
                font-weight: bold
            .subtext
                color: lighten(black, 50%)
                font-size: .6em
                font-weight: normal
    .img
        height: $top-height
        width: 100%
        background-image: $main-bg
        padding: 20px
        box-sizing: border-box
        position: relative
        img
            width: 160px
            height: 160px
            padding: 3px
            border-radius: 50%
            border: 3px solid rgba(255,255,255,.6)
            position: absolute
            left: calc(50% - 84px)
            top: 26px
        &:after
            content: ""
            position: absolute
            width: 180px
            height: 180px
            border-radius: 50%
            left: calc(50% - 91.5px)
            top: 20px
            border: 3px solid rgba(255,255,255,.4)
        &:before
            content: ""
            position: absolute
            width: 190px
            height: 190px
            border-radius: 50%
            left: calc(50% - 95px)
            top: 15.5px
            border: 2px solid rgba(255,255,255,.2)
    .links
        width: 100%
        height: $bottom-height
        background: $main-bg-color
        border-top: 1px solid $link-border
        margin-top: 35px
        border-radius: 5px
        color: white
        font-size: 2em
        line-height: 1.5em
        position: absolute
        bottom: 0
        a
            color: white
        .fb
            position: absolute
            left: 0
            width: 25%
            height: 100%
            background-color: $fb-color
            &:hover
                background-color: lighten($fb-color, 5%)
        .twitter
            position: absolute
            left: 25%
            width: 25%
            height: 100%
            background-color: $twitter-color
            &:hover
                background-color: lighten($twitter-color, 5%)
        .follow
            position: absolute
            left: 50%
            width: 50%
            height: 100%
            background-color: $follow-color
            &:hover
                background-color: lighten($follow-color, 5%)
.profile-card-2
    width: 250px
    height: 500px
    background: $main-color
!

JS 

              
                // no js
!
999px

Console