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POUnderstanding Crockford's Object.create shim
 

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    <p>I've been reading up on the Crockford shim for preventing the overwriting of prototypes, and understand that it's not the end-all/be-all solution at times. I also understand that <a href="https://github.com/kriskowal/es5-shim" rel="nofollow noreferrer">ES5 Shim</a> may be a viable alternative to this. I also read <a href="https://stackoverflow.com/questions/3830800/object-defineproperty-in-es5#3844768">this post which provides a more robust, secure alternative</a>.</p> <p>Still, I'd like to know what his <code>Object.create</code> shim is "saying" and then "doing." Can someone please tell me if my explanation comments are right?</p> <pre><code>if (typeof Object.create === 'undefined') { //If the browser doesn't support Object.create Object.create = function (o) { //Object.create equals an anonymous function that accepts one parameter, 'o'. function F() {}; //Create a new function called 'F' which is just an empty object. F.prototype = o; //the prototype of the 'F' function should point to the //parameter of the anonymous function. return new F(); //create a new constructor function based off of the 'F' function. }; } //Then, based off of the 'Lost' example in the Crockford book... var another_stooge = Object.create(stooge); //'another_stooge' prototypes off of 'stooge' using new school Object.create. //But if the browser doesn't support Object.create, //'another_stooge' prototypes off of 'stooge' using the old school method. </code></pre> <p>This way, the prototype of the 'stooge' object can't be overwritten when we augment stuff to 'another_stooge'. No need to reset the 'stooge' prototype using 'constructor'.</p> <p>Thanks in advance,</p> <p>-k</p>
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