Strict Mode Support

by Leo Lanese July 04, 2013

HTML

<!--
ECMAScript 5's strict mode is a way to opt in to a restricted variant of JavaScript.

- Throws errors for actions that are rather silly but previously didn’t throw an error
- Throws errors for potentially unsafe actions
- Disables functions that are poorly thought out
- Potentially code in strict mode could run faster by eliminating mistakes that would make it difficult for JavaScript engines to perform optimizations

-->

JavaScript

var isStrictModeSupported = (function(){"use strict";return !this}());
 alert(isStrictModeSupported);

/* function to try strict mode example */

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Strict Mode Support

HTML

JavaScript

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