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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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Adding Classes

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About the <head>

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Insecure Resource

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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-.

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

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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

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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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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.

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HTML 

              
                <body class="hm-gradient">
    
    <main>
        
        <!--MDB Animations-->
        <div class="container mt-4">

            <div class="text-center darken-grey-text mb-4">
                <h1 class="font-bold mt-4 mb-3 h5">Built with Material Design for Bootstrap 4</h1>
                <a class="btn btn-danger btn-md" href="https://mdbootstrap.com/material-design-for-bootstrap/" target="_blank">Free download<i class="fa fa-download pl-2"></i></a>
            </div>

            <!--Section: Live preview-->
            <section>

                <div class="row mb-4 d-flex flex-column">

                    <div class="col-md-4 mb-4 mx-auto">
                        <img src="https://mdbootstrap.com/img/Photos/Horizontal/Nature/4-col/img%20(121).jpg" alt="A view on mountains." class="img-fluid z-depth-1 wow bounceIn">
                    </div>

                    <div class="col-md-4 mb-4 mx-auto">
                        <img src="https://mdbootstrap.com/img/Photos/Horizontal/Nature/4-col/img%20(115).jpg" alt="Cottage on a lake surrounded by mountains." class="img-fluid z-depth-1 wow tada" data-wow-delay="0.2s">
                    </div>

                    <div class="col-md-4 mb-4 mx-auto">
                        <img src="https://mdbootstrap.com/img/Photos/Horizontal/Nature/4-col/img%20(122).jpg" alt="Cyclist riding down the mountain path." class="img-fluid z-depth-1 wow fadeInLeft" data-wow-delay="0.3s">
                    </div>

                    <div class="col-md-4 mb-4 mx-auto">
                        <img src="https://mdbootstrap.com/img/Photos/Horizontal/Nature/4-col/img%20(1).jpg" alt="View on mountains from mountain top." class="img-fluid z-depth-1 wow fadeInRight">
                    </div>

                    <div class="col-md-4 mb-4 mx-auto">
                        <img src="https://mdbootstrap.com/img/Photos/Horizontal/Nature/4-col/img%20(2).jpg" alt="Rocky shore in the morning." class="img-fluid z-depth-1 wow jello">
                    </div>

                    <div class="col-md-4 mb-4 mx-auto">
                        <img src="https://mdbootstrap.com/img/Photos/Horizontal/Nature/4-col/img%20(7).jpg" alt="Rocky shore in the morning." class="img-fluid z-depth-1 wow swing">
                    </div>

                    <div class="col-md-4 mb-4 mx-auto">
                        <img src="https://mdbootstrap.com/img/Photos/Horizontal/Nature/4-col/img%20(32).jpg" alt="View on mountains from mountain top." class="img-fluid z-depth-1 wow wobble">
                    </div>

                    <div class="col-md-4 mb-4 mx-auto">
                        <img src="https://mdbootstrap.com/img/Photos/Horizontal/Nature/4-col/img%20(31).jpg" alt="Rocky shore in the morning." class="img-fluid z-depth-1 wow zoomIn">
                    </div>

                    <div class="col-md-4 mx-auto">
                        <img src="https://mdbootstrap.com/img/Photos/Horizontal/Nature/4-col/img%20(125).jpg" alt="Rocky shore in the morning." class="img-fluid z-depth-1 wow flipInX">
                    </div>

                </div>

            </section>
            <!--Section: Live preview-->
          
            <hr class="my-4">
          
            <div class="text-center darken-grey-text mb-4">
                <h3 class="font-bold mb-3">Here you can find more Animations:</h3>
                <a class="btn btn-danger" href="https://mdbootstrap.com/css/animations/" target="_blank">Bootstrap Animations</a>
            </div>

        </div>
        <!--MDB Animations-->
      
    </main>
  
</body>
!

CSS 

              
                .hm-gradient {
    background-image: linear-gradient(to top, #f3e7e9 0%, #e3eeff 99%, #e3eeff 100%);
}
.darken-grey-text {
    color: #2E2E2E;
}
!

JS 

              
                new WOW().init();
!
999px

Console