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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/const
The const declaration creates a read-only reference to a value. It does not mean the value it holds is immutable, just that the variable identifier cannot be reassigned. For instance, in the case where the content is an object, this means the object's contents (e.g., its properties) can be altered.
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://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/let
An explanation of why the name "let" was chosen can be found here. Scoping rules. Variables declared by let have their scope in the block for which they are defined, as well as in any contained sub-blocks. In this way, let works very much like var. The main difference is that the scope of a var variable is the entire enclosing function:
https://stackoverflow.com/questions/37036791/so-im-using-javascript-const-keyword-what-happens-in-ie
If someone jumps on my site on IE10< will the "const" keyword be re-assigned to "var"? if not will the whole site fail? the MDN docs on the const keyword give a handy chart at the bottom which tells me that not only IE, but rather many Mobile browsers do not support it either. should i just scrap it and use var?
http://kangax.github.io/compat-table/es6/
Compilers/polyfills Desktop browsers Servers/runtimes Mobile; Feature name Current browser ES6 Trans-piler Traceur Babel 6 + core-js 2 Babel 7 + core-js 2
https://stackoverflow.com/questions/130396/are-there-constants-in-javascript
Since this answer is still highly ranked by Google in 2015 it should be said that it is now obsolete. The const keyword is now officially part of the language and is supported by every browser. According to statcounter.com only a few percent of internet users still use old browser versions that didn't support const. – twhb Sep 6 '15 at 16:50
https://www.w3schools.com/Js/js_es6.asp
CSS Reference CSS Browser Support CSS Selector Reference Bootstrap 3 Reference Bootstrap 4 Reference W3.CSS Reference Icon Reference Sass Reference. JavaScript ... JavaScript const. The const statement allows you to declare a constant (a JavaScript variable with a constant value).
https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Statements/const
const 선언은 블록 범위의 상수를 선언합니다. 상수의 값은 재할당할 수 없으며 다시 선언할 수도 없습니다.
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