sandpit
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A playground for creative coding using JavaScript and the canvas element
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<h3><a href="index.html">⛱ Sandpit</a></h3><h3></h3><ul><li><a href="tutorial-01-documentation.html"> Documentation</a></li><li><a href="tutorial-02-inspiration.html"> Inspiration</a></li></ul><h3>Classes</h3><ul><li><a href="Color.html">Color</a></li><li><a href="Is.html">Is</a><ul class='methods'><li data-type='method'><a href="Is.html#.array">array</a></li><li data-type='method'><a href="Is.html#.canvas">canvas</a></li><li data-type='method'><a href="Is.html#.element">element</a></li><li data-type='method'><a href="Is.html#.object">object</a></li></ul></li><li><a href="Mathematics.html">Mathematics</a><ul class='methods'><li data-type='method'><a href="Mathematics.html#.randomBetween">randomBetween</a></li><li data-type='method'><a href="Mathematics.html#.randomFrom">randomFrom</a></li></ul></li><li><a href="Sandpit.html">Sandpit</a><ul class='methods'><li data-type='method'><a href="Sandpit.html#clear">clear</a></li><li data-type='method'><a href="Sandpit.html#clearQueryString">clearQueryString</a></li><li data-type='method'><a href="Sandpit.html#fill">fill</a></li><li data-type='method'><a href="Sandpit.html#get">get</a></li><li data-type='method'><a href="Sandpit.html#random">random</a></li><li data-type='method'><a href="Sandpit.html#resizeCanvas">resizeCanvas</a></li><li data-type='method'><a href="Sandpit.html#setupStats">setupStats</a></li><li data-type='method'><a href="Sandpit.html#start">start</a></li><li data-type='method'><a href="Sandpit.html#stop">stop</a></li></ul></li><li><a href="Stats.html">Stats</a></li><li><a href="Vector.html">Vector</a></li></ul><h2 class="version">v0.1.15</h2>
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<h1 class="page-title">utils/Is.js</h1>
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<pre class="prettyprint source linenums"><code>/**
* A utility for testing the type of a reference
*/
class Is {
/**
* Tests if the object is a HTMLElement
* @param {object} object - The object to test
* @returns {boolean} If set to true, the object is a HTMLElement
*/
static element (object) {
// Credit: http://stackoverflow.com/a/384380
try {
// Using W3 DOM2 (works for FF, Opera and Chrom)
return object instanceof window.HTMLElement
} catch (e) {
// Browsers not supporting W3 DOM2 don't have HTMLElement and
// an exception is thrown and we end up here. Testing some
// properties that all elements have. (works on IE7)
return (typeof object === 'object') &&
(object.nodeType === 1) && (typeof object.style === 'object') &&
(typeof object.ownerDocument === 'object')
}
}
/**
* Tests if the object is an array
* @param {object} object - The object to test
* @returns {boolean} If set to true, the object is an array
*/
static array (object) {
return Object.prototype.toString.call(object) === '[object Array]'
}
/**
* Tests if the object is an object, not an array
* @param {object} object - The object to test
* @returns {boolean} If set to true, the object is an object
*/
static object (object) {
return typeof object === 'object' && !this.array(object)
}
/**
* Tests if the object is a canvas
* @param {object} object - The object to test
* @returns {boolean} If set to true, the object is a canvas
*/
static canvas (object) {
return !!object.getContext
}
}
export default Is
</code></pre>
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