Created
March 29, 2016 02:43
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Method to setup inheritance
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// http://stackoverflow.com/a/4389429 | |
function extend(base, sub) { | |
// Avoid instantiating the base class just to setup inheritance | |
// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/create | |
// for a polyfill | |
// Also, do a recursive merge of two prototypes, so we don't overwrite | |
// the existing prototype, but still maintain the inheritance chain | |
// Thanks to @ccnokes | |
var origProto = sub.prototype; | |
sub.prototype = Object.create(base.prototype); | |
for (var key in origProto) { | |
sub.prototype[key] = origProto[key]; | |
} | |
// Remember the constructor property was set wrong, let's fix it | |
sub.prototype.constructor = sub; | |
// In ECMAScript5+ (all modern browsers), you can make the constructor property | |
// non-enumerable if you define it like this instead | |
Object.defineProperty(sub.prototype, 'constructor', { | |
enumerable: false, | |
value: sub | |
}); | |
} |
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