Searching for Strict Mode Browser Support information? Find all needed info by using official links provided below.
https://www.w3schools.com/js/js_strict.asp
The purpose of "use strict" is to indicate that the code should be executed in "strict mode". With strict mode, you can not, for example, use undeclared variables. All modern browsers support "use strict" except Internet Explorer 9 and lower:
Nov 04, 2019 · "Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers. The site was built and is maintained by Alexis Deveria, with occasional updates provided by the web development community. The design used as of 2014 was largely created by Lennart Schoors. FAQ
https://love2dev.com/blog/javascript-strict-mode/
JavaScript Strict Mode Support. This is a very safe feature to use. Every modern browser and node supports and has supported strict mode for years. If the browser does not support strict mode the expression is simply ignored. It is just a string followed by a semi-colon, a perfectly legal JavaScript statement. What Strict Mode Breaks. I hate to ...
https://www.lambdatest.com/ECMAScript-5-Strict-Mode
With LambdaTest you can perform browser comatibility testing of JAVASCRIPT ECMAScript 5 Strict Mode element across 2000+ browser-OS combinations. ... "Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.
https://www.devcurry.com/2011/06/javascript-strict-mode-support-in.html
Since the Strict mode is declared as a string, it is backward compatible. Older browsers simply ignore it, without raising any errors. However you should make sure to test your code in browsers that do and do not support strict mode.
https://stackoverflow.com/questions/18223517/is-it-safe-to-use-use-strict-in-ie-8-9
There is some syntax allowed in strict mode that will fail outside of strict mode. In particular, using keywords as object properties. myObject.break = true works in strict mode, fails outside of it. – Jeremy J Starcher Aug 14 '13 at 9:22
https://en.wikipedia.org/wiki/Strict_mode
A third compatibility mode known as either "almost standards mode" or "strict mode" which maintains the "traditional" vertical sizing of table cells according to the CSS2 specification, has been implemented in these browsers: Safari, Opera 7.5 (and later), all Gecko-based browsers since 1.0.1 (such as Firefox) and Internet Explorer 8.
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