ecmascript-5

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JavaScript: Can ECMAScript 5's Strict Mode ("use strict") be enabled using single quotes ('use strict')?

JavaScript doesn\'t care if your Strings are double-quoted \"double\" or single-quoted \'single\'. Every example of ECMAScript 5\'s strict mode has it enabled by \"use strict\" in double-quotes. Can[详细]

2023-02-14 23:52 分类：问答
What is the correlation between ECMAScript 5 and JavaScript 1.8.5 in terms of language features?

I\'ve been reading up on Mozilla\'s continuing development of JavaScript, up through version 1.8.5: https://developer.mozilla.org/en/JavaScript.[详细]

2023-02-08 05:42 分类：问答
Working around IE8's broken Object.defineProperty implementation

Consider the following code, using ECMAScript5\'s Object.defineProperty feature: var sayHi = function(){ alert(\'hi\'); };[详细]

2023-02-07 06:26 分类：问答
Does JavaScript (ECMAScript5) Strict Mode offer significant performance advantages to merit widespread use?

I\'m reading up a bit on using Strict Mode for JavaScript and it seems that, generally speaking, the idea is to force a more rigid set of rules onto the coder to ensure that the JS engine can optimise[详细]

2023-02-06 22:37 分类：问答
SharePoint 2010: Set SPWeb.RequestAccessEmail via EcmaScript

I have a custom ribbon button which creates a Site Group with a predefined set of permissions. This is all done using EcmaScript and so far is working 100%.[详细]

2023-02-06 22:00 分类：问答
hasOwnProperty and ECMAScript 5 strict mode

I\'m curious: anyone knows why the ECMAScript5 specification hasn\'t tightened more the predefined object prototype\'s properties in strict mode? For instance, it seems like there\'s no info regarding[详细]

2023-02-03 05:34 分类：问答
How to force google closure compiler to keep "use strict"; in the compiled js code?

If you\'re using the module pattern and have something like this: (function () { \"use strict\"; // this function is strict...[详细]

2023-01-31 11:40 分类：问答
How to make sure ES3 programs will run in an ES5 engine?

So ECMAScript 5 introduces some incompatibilities with ECMAScript 3. Example: Many articles have been written stating that this === null || this === undefined is possible in ES5 strict mode:[详细]

2023-01-22 01:38 分类：问答
Object.defineProperty in ES5?

I\'m seeing posts about a \'new\' Object.create that makes enumeration configurable.However, it relies on a Object.defineProperty method.I can\'t find a cross browser imp开发者_如何转开发lementation f[详细]

2023-01-18 17:58 分类：问答
What modernizer scripts exist for the new ECMAScript 5 functions?

ECMAScript 5开发者_Python百科 has quite a few nice additions. John Resig has a good overview here. Here is a good ECMAScript 5 compatibility table.[详细]

2023-01-04 05:04 分类：问答