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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).

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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.

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Packages

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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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HTML 

              
                <!-- SVG SOURCE -->
    <svg height="0" width="0" style="position:absolute;margin-left: -100%;">
<path id="heart-icon" d="M16,28.261c0,0-14-7.926-14-17.046c0-9.356,13.159-10.399,14-0.454c1.011-9.938,14-8.903,14,0.454
	C30,20.335,16,28.261,16,28.261z"/>   
      
<filter id='inset-shadow' data-iconmelon='filter:96c25f4e7a8a5b39d6df22c349dbaf39' >
    <!-- Shadow offset -->
    <feOffset
            dx='0'
            dy='0'
          />
    <!-- Shadow blur -->
    <feGaussianBlur
            stdDeviation='1'
            result='offset-blur'
          />
    <!-- Invert drop shadow to make an inset shadow-->
    <feComposite
            operator='out'
            in='SourceGraphic'
            in2='offset-blur'
            result='inverse'
          />
    <!-- Cut colour inside shadow -->
    <feFlood
            flood-color='black'
            flood-opacity='.95'
            result='color'
          />
    <feComposite
            operator='in'
            in='color'
            in2='inverse'
            result='shadow'
          />
    <!-- Placing shadow over element -->
    <feComposite
            operator='over'
            in='shadow'
            in2='SourceGraphic'
          />
  </filter>
  
  <filter id='emboss' x="-25%" y="-25%" width="150%" height="150%">
    <feOffset in="SourceAlpha" dx="0.16666666666666666" dy="0.8333333333333334" result="17"></feOffset>
    <feGaussianBlur stdDeviation="0.5" in="17" result="18"></feGaussianBlur>
    <feSpecularLighting surfaceScale="1" specularConstant="0.9" specularExponent="15" in="18" result="19">
      <fePointLight x="-1000" y="-5000"   z="300"></fePointLight>
    </feSpecularLighting>
    <feComposite in="19" in2="SourceAlpha" operator="in" result="20"></feComposite>
    <feOffset in="SourceAlpha" dx="-0.16666666666666666" dy="-0.8333333333333334" result="21"></feOffset>
    <feGaussianBlur stdDeviation="0.5" in="21" result="22"></feGaussianBlur>
    <feSpecularLighting surfaceScale="1" specularConstant="1.8" specularExponent="8" in="22" result="23">
      <fePointLight x="100" y="5000" z="300"></fePointLight>
    </feSpecularLighting>
    <feComposite in="23" in2="SourceAlpha" operator="in" result="24"></feComposite
    
  >
    <feColorMatrix values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .85 0" in="24" result="25"></feColorMatrix>
    <feComposite k1="0" k2="0.8" k3="0.5" k4="0" in="20" in2="25" operator="arithmetic" result="26"></feComposite>
    <feMerge in="26" result="27">
      <feMergeNode in="SourceGraphic"></feMergeNode>
      <feMergeNode in="26"></feMergeNode>
    </feMerge>
  </filter>
  <filter id='blurry' x="-200%" y="-200%" width="400%" height="400%">
    <feGaussianBlur in="SourceGraphic" stdDeviation="1" />
  </filter>

  <filter id='color-shadow' color-interpolation-filters="sRGB">
    <feComponentTransfer in="SourceGraphic">
      <feFuncR type="discrete" tableValues=".5"/>
      <feFuncG type="discrete" tableValues=".5"/>
      <feFuncB type="discrete" tableValues=".5"/>
    </feComponentTransfer>
    <feGaussianBlur stdDeviation=".85"/>
    <feOffset dx="1" dy="1" result="shadow"/>
    <feComposite in="SourceGraphic" in2="shadow" operator="over"/>
  </filter>
      
      
        <filter id='color-shadow2' color-interpolation-filters="sRGB">
     <feOffset dx="1" dy="1"/>
    <feGaussianBlur stdDeviation=".85"/>
    <feColorMatrix type="matrix" values="0 0 0 0 .2, 1 0 0 0 1, 1 0 0 0 .75, 0 0 0 1 0" result="shadow"/>
    <feMerge>
      <feMergeNode in="shadow"/>
      <feMergeNode in="SourceGraphic"/>
    </feMerge>
  </filter>
         
    </svg>
<!-- SVG SOURCE ends-->




<h4>filter effects:</h4>

<div>
  <svg class="icon" viewBox="0 0 32 32">
      <g filter="url(#color-shadow)">
        <use xlink:href="#heart-icon"></use>
      </g>
  </svg>
  
  <svg class="icon is-check" viewBox="0 0 32 32">
     <g filter="url(#color-shadow)">
      <use xlink:href="#heart-icon"></use>
    </g>
  </svg>
    
    <svg class="icon is-x1_5" viewBox="0 0 32 32">
      <g filter="url(#color-shadow)">
        <use xlink:href="#heart-icon"></use>
      </g>
  </svg>
  
  <svg class="icon is-x1_5 is-check" viewBox="0 0 32 32">
     <g filter="url(#color-shadow)">
      <use xlink:href="#heart-icon"></use>
    </g>
  </svg>
    
  <svg class="icon is-x2" viewBox="0 0 32 32">
      <g filter="url(#color-shadow)">
        <use xlink:href="#heart-icon"></use>
      </g>
  </svg>
  
  <svg class="icon is-x2 is-check" viewBox="0 0 32 32">
     <g filter="url(#color-shadow)">
      <use xlink:href="#heart-icon"></use>
    </g>
  </svg>

</div>


<div>
  <svg class="icon" viewBox="0 0 32 32">
      <g filter="url(#inset-shadow)">
        <use xlink:href="#heart-icon"></use>
      </g>
  </svg>
  
  <svg class="icon is-check" viewBox="0 0 32 32">
     <g filter="url(#inset-shadow)">
      <use xlink:href="#heart-icon"></use>
    </g>
  </svg>
    
    <svg class="icon is-x1_5" viewBox="0 0 32 32">
      <g filter="url(#inset-shadow)">
        <use xlink:href="#heart-icon"></use>
      </g>
  </svg>
  
  <svg class="icon is-x1_5 is-check" viewBox="0 0 32 32">
     <g filter="url(#inset-shadow)">
      <use xlink:href="#heart-icon"></use>
    </g>
  </svg>
    
  <svg class="icon is-x2" viewBox="0 0 32 32">
      <g filter="url(#inset-shadow)">
        <use xlink:href="#heart-icon"></use>
      </g>
  </svg>
  
  <svg class="icon is-x2 is-check" viewBox="0 0 32 32">
     <g filter="url(#inset-shadow)">
      <use xlink:href="#heart-icon"></use>
    </g>
  </svg>
</div>




<div>
  <svg class="icon" viewBox="0 0 32 32">
      <g filter="url(#emboss)">
        <use xlink:href="#heart-icon"></use>
      </g>
  </svg>
  
  <svg class="icon is-check" viewBox="0 0 32 32">
     <g filter="url(#emboss)">
      <use xlink:href="#heart-icon"></use>
    </g>
  </svg>
    
    <svg class="icon is-x1_5" viewBox="0 0 32 32">
      <g filter="url(#emboss)">
        <use xlink:href="#heart-icon"></use>
      </g>
  </svg>
  
  <svg class="icon is-x1_5 is-check" viewBox="0 0 32 32">
     <g filter="url(#emboss)">
      <use xlink:href="#heart-icon"></use>
    </g>
  </svg>
    
  <svg class="icon is-x2" viewBox="0 0 32 32">
      <g filter="url(#emboss)">
        <use xlink:href="#heart-icon"></use>
      </g>
  </svg>
  
  <svg class="icon is-x2 is-check" viewBox="0 0 32 32">
     <g filter="url(#emboss)">
      <use xlink:href="#heart-icon"></use>
    </g>
  </svg>
</div>



<div>
  
   <svg class="icon" viewBox="0 0 32 32">
      <g filter="url(#color-shadow2)">
        <use xlink:href="#heart-icon"></use>
      </g>
  </svg>
  
  <svg class="icon is-check" viewBox="0 0 32 32">
     <g filter="url(#color-shadow2)">
      <use xlink:href="#heart-icon"></use>
    </g>
  </svg>
    
    <svg class="icon is-x1_5" viewBox="0 0 32 32">
      <g filter="url(#color-shadow2)">
        <use xlink:href="#heart-icon"></use>
      </g>
  </svg>
  
  <svg class="icon is-x1_5 is-check" viewBox="0 0 32 32">
     <g filter="url(#color-shadow2)">
      <use xlink:href="#heart-icon"></use>
    </g>
  </svg>
    
  <svg class="icon is-x2" viewBox="0 0 32 32">
      <g filter="url(#color-shadow2)">
        <use xlink:href="#heart-icon"></use>
      </g>
  </svg>
  
  <svg class="icon is-x2 is-check" viewBox="0 0 32 32">
     <g filter="url(#color-shadow2)">
      <use xlink:href="#heart-icon"></use>
    </g>
  </svg>
  
</div>
!

CSS 

              
                .icon{
  width: 32px;
  height: 32px;
  fill: #ccc;
}

.icon.is-check{
  fill: #FE4365;
}

.icon.is-x1_5{
  width: 48px;
  height: 48px;
}

.icon.is-x2{
  width: 64px;
  height: 64px;
}


body{
   font-family: monospace;
   color: #0099CC;
}
!

JS
!
999px

Console