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CSS Base

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Add External Stylesheets/Pens

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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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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.

            
              <div class="container">  
  <div class="row">
    <div class="column">
      <div class="my-content"></div>
    </div>
    <div class="column">
      <div class="my-content"></div>
    </div>
    <div class="column">
      <div class="my-content"></div>
    </div>
  </div>
</div>

<div>Column width: <span id="output"></span>px</div>
            
          
!
            
              .column {
  float: left;
  box-sizing: border-box;
  width: 33.3333333%;
  padding: 0 4px;
}

.container {
  padding: 8px 3%;
  background-color: gray;
}

.row {
  margin-left: -8px;
  margin-right: -8px;
  overflow: hidden;
}

.my-content {
  height: 40px;
  background-color: rgb(220, 220, 220);
}
            
          
!
            
              var HAS_COMPUTED_STYLE = !!window.getComputedStyle;
var getStyles = window.getComputedStyle || function() {};

var COMPUTED_SIZE_INCLUDES_PADDING = (function() {
  if (!HAS_COMPUTED_STYLE) {
    return false;
  }

  var parent = document.body || document.documentElement;
  var e = document.createElement('div');
  e.style.cssText = 'width:10px;padding:2px;' +
    '-webkit-box-sizing:border-box;box-sizing:border-box;';
  parent.appendChild(e);

  var width = getStyles(e, null).width;
  var ret = width === '10px';

  parent.removeChild(e);

  return ret;
}());

/**
 * Retrieve the computed style for an element, parsed as a float.
 * @param {Element} element Element to get style for.
 * @param {string} style Style property.
 * @param {CSSStyleDeclaration} [styles] Optionally include clean styles to
 *     use instead of asking for them again.
 * @return {number} The parsed computed value or zero if that fails because IE
 *     will return 'auto' when the element doesn't have margins instead of
 *     the computed style.
 */
var getNumberStyle = function(element, style, styles) {
  if (HAS_COMPUTED_STYLE) {
    styles = styles || getStyles(element, null);
    var value = getFloat(styles[style]);

    // Support IE<=11 and W3C spec.
    if (!COMPUTED_SIZE_INCLUDES_PADDING && style === 'width') {
      value += getFloat(styles.paddingLeft) +
        getFloat(styles.paddingRight) +
        getFloat(styles.borderLeftWidth) +
        getFloat(styles.borderRightWidth);
    } else if (!COMPUTED_SIZE_INCLUDES_PADDING && style === 'height') {
      value += getFloat(styles.paddingTop) +
        getFloat(styles.paddingBottom) +
        getFloat(styles.borderTopWidth) +
        getFloat(styles.borderBottomWidth);
    }

    return value;
  } else {
    return getFloat($(element).css(style));
  }
};

var isNumber = function(n) {
	return !isNaN(parseFloat(n)) && isFinite(n);
}

var getFloat = function(value) {
  value = parseFloat(value);
  return isNumber(value) ? value : 0
};

function showWidth() {
  var output = document.querySelector('#output');
  var column = document.querySelector('.column');
  output.textContent = getNumberStyle(column, 'width');
}

window.addEventListener('resize', showWidth);

showWidth();
            
          
!
999px
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