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Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

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You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

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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Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

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Code Indentation


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HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              <canvas width="600" height="800" id="target"></canvas>

              function wrapText (context, text, x, y, maxWidth, lineHeight) {
    var words = text.split(' '),
        line = '',
        lineCount = 0,

    for (i = 0; i < words.length; i++) {
        test = words[i];
        metrics = context.measureText(test);
        while (metrics.width > maxWidth) {
            // Determine how much of the word will fit
            test = test.substring(0, test.length - 1);
            metrics = context.measureText(test);
        if (words[i] != test) {
            words.splice(i + 1, 0,  words[i].substr(test.length))
            words[i] = test;

        test = line + words[i] + ' ';  
        metrics = context.measureText(test);
        if (metrics.width > maxWidth && i > 0) {
            context.fillText(line, x, y);
            line = words[i] + ' ';
            y += lineHeight;
        else {
            line = test;
    context.fillText(line, x, y);

var ctx = document.getElementById('target').getContext('2d'),
    text = 'Antidisestablishmentarianism dictum feugiat nisl ut dapibus. Mauris iaculis porttitor posuere. Praesent id metus massa, ut antidisestablishmentarianism odio. Proin quis tortor orci. Etiam at risus et  justo dignissim congue. Donec congue lacinia dui, a porttitor lectus condimentum  laoreet. Nunc eu antidisestablishmentarianism orci. Quisque eget odio ac lectus vestibulum faucibus  eget in metus. In pellentesque faucibus vestibulum. Nulla at nulla justo, eget luctus  tortor. Nulla facilisi. Duis aliquet egestas purus in blandit. Curabitur vulputate.';

ctx.font = '14px/1.4 arial, sans-serif';
ctx.fillStyle = '#2a2a2a';  

wrapText(ctx, text, 10, 20, 160, 18);
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