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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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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-.

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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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HTML 

              
                <p>
<!-- Below are a series of inputs which allow file selection and interaction with the cropper api -->
		<input type="file" id="fileInput" accept="image/*" />
		<input type="button" id="btnCrop" value="Crop" />
		<input type="button" id="btnRestore" value="Restore" />
</p>
<div>
  <canvas id="canvas">
    Your browser does not support the HTML5 canvas element.
  </canvas>
</div>		

<div id="result"></div>

<br />
<br />
<hr />
<p>If you find this demo useful, please consider <a href="https://www.paypal.com/cgi-bin/webscr?business=rob@robgravelle.com&cmd=_xclick&currency_code=USD&amount=1.00&item_name=donating%20%241%20dollar" target="_blank">donating $1 dollar</a> for a coffee using the button below or purchasing one of my songs from <a href="https://ax.itunes.apple.com/WebObjects/MZSearch.woa/wa/search?term=rob%20gravelle" target="_blank">iTunes.com</a> or <a href="http://www.amazon.com/s/ref=ntt_srch_drd_B001ES9TTK?ie=UTF8&field-keywords=Rob%20Gravelle&index=digital-music&search-type=ss" target="_blank">Amazon.com</a> for only 0.99 cents each. I have also released CDs with my band <a href="https://www.cdbaby.com/Artist/IvoryKnight" target="_blank">Ivory Knight</a> and Annihilator main-man Jeff Waters.</p>
<p>Rob uses and recommends <a href="http://www.mochahost.com/2425.html" target="_blank">MochaHost</a>, which provides Web Hosting for as low as $1.95 per month, as well as unlimited emails and disk space!</p>
!

CSS 

              
                /* Limit image width to avoid overflow the container */
img {
  max-width: 100%; /* This rule is very important, please do not ignore this! */
}

#canvas {
  height: 600px;
  width: 600px;
  background-color: #ffffff;
  cursor: default;
  border: 1px solid black;
}
!

JS 

              
                var canvas  = $("#canvas"),
    context = canvas.get(0).getContext("2d"),
    $result = $('#result');

$('#fileInput').on( 'change', function(){
    if (this.files && this.files[0]) {
      if ( this.files[0].type.match(/^image\//) ) {
        var reader = new FileReader();
        reader.onload = function(evt) {
           var img = new Image();
           img.onload = function() {
             context.canvas.height = img.height;
             context.canvas.width  = img.width;
             context.drawImage(img, 0, 0);
             var cropper = canvas.cropper({
               aspectRatio: 16 / 9
             });
             $('#btnCrop').click(function() {
                // Get a string base 64 data url
                var croppedImageDataURL = canvas.cropper('getCroppedCanvas').toDataURL("image/png"); 
                $result.append( $('<img>').attr('src', croppedImageDataURL) );
             });
             $('#btnRestore').click(function() {
               canvas.cropper('reset');
               $result.empty();
             });
           };
           img.src = evt.target.result;
				};
        reader.readAsDataURL(this.files[0]);
      }
      else {
        alert("Invalid file type! Please select an image file.");
      }
    }
    else {
      alert('No file(s) selected.');
    }
});
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999px

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