Es5 Strict Mode Support

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ECMAScript 5 compatibility table - GitHub Pages

    http://kangax.github.io/compat-table/es5/
    [1] Results are only applicable for the KHTML rendering engine. [2] Flagged features have to be enabled via --harmony flag [3] Flagged features have to be enabled via --harmony or --es_staging flag [4] Executed in Node.js/JVM mode via graalvm/bin/node --jvm. [5] In Internet Explorer 8 Object.defineProperty only accepts DOM objects (MSDN reference). [6] In Internet Explorer 8 Object ...

John Resig - ECMAScript 5 Strict Mode, JSON, and More

    https://johnresig.com/blog/ecmascript-5-strict-mode-json-and-more/
    It should be noted that ECMAScript 5’s strict mode is different from the strict mode available in Firefox (which can be turned on by going to about:config and enabled javascript.options.strict). ES5’s strict mode complains about a completely different set of potential errors (whereas Firefox’s existing strict mode tries to enforce some ...

Where's Walden? » New ES5 strict mode support: now with ...

    http://whereswalden.com/2010/09/08/new-es5-strict-mode-support-now-with-poison-pills/
    ES5 strict mode: self-limitation, not wish fulfillment. ES5 introduces the curious concept of strict mode. Strict mode, whose name and concept derive from the similar feature in Perl, is a new feature in ES5 whose purpose is to deliberately reduce the things you can do in JavaScript.

Where's Walden? » New ES5 strict mode support: new vars ...

    http://whereswalden.com/2011/01/10/new-es5-strict-mode-support-new-vars-created-by-strict-mode-eval-code-are-local-to-that-code-only/
    ES5’s strict mode blunts eval‘s sharpest corners to simplify it and permit typical optimizations in code using it. But while strict mode eval is better than regular eval, Function is still the best way to generate code at runtime. If you must use eval, consider using strict mode eval for a simpler binding model and eventual performance ...

JavaScript Versions

    https://www.w3schools.com/Js/js_versions.asp
    IE 4 was the first browser to support ECMAScript 1 (1997). IE 5 was the first browser to support ECMAScript 2 (1999). IE 5.5 was the first browser to support ECMAScript 3 (2000). IE 9* was the first browser to support ECMAScript 5 (2011).

ECMAScript5 Features - Strict Mode, JSON And More

    https://www.c-sharpcorner.com/article/ecmascript5-features-strict-mode-json-and-more/
    Strict Mode is a new feature in ECMAScript 5 that allows you to place a program, or a function, in a “strict” operating context. This strict context prevents certain actions from being taken and throws more exceptions (generally providing the user with more information and a tapered-down coding experience).

javascript - Not recommended to use "use strict" in ES6 ...

    https://stackoverflow.com/questions/31685262/not-recommended-to-use-use-strict-in-es6
    Module code is always strict mode code. All parts of a ClassDeclaration or a ClassExpression are strict mode code. Eval code is strict mode code if it begins with a Directive Prologue that contains a Use Strict Directive or if the call to eval is a direct eval (see 12.3.4.1) that is contained in strict mode code.



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