Searching for Javascript Const Keyword Browser Support information? Find all needed info by using official links provided below.
https://stackoverflow.com/questions/2356830/what-browsers-currently-support-javascripts-let-keyword
EDIT: let and const are supported by all modern browsers and are part of the ECMAScript 2015 (ES6) specification.. Basically if you don't need to support anything below IE11, let and const are safe to use nowadays. On IE11 there's a small quirk with let when used with for loops, the variable is not bound to the for block as you would expect, it behaves as var did...
https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Statements/const
Apr 27, 2019 · 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.
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/21237105/const-in-javascript-when-to-use-it-and-is-it-necessary
Const in JavaScript: when to use it and is it necessary? Ask Question Asked 5 years, ... Despite having fairly decent browser support, I'd avoid using it for now. ... but is included in Internet Explorer 11. The const keyword currently declares the constant in the function scope (like variables declared with var). It then goes on to say:
https://stackoverflow.com/questions/12545077/javascript-constant-and-opera-browser
As of Safari 5.1.7 and Opera 12.00, if you define a variable with const in these browsers, you can still change its value later. It is not supported in Internet Explorer 6-9, or in the preview of Internet Explorer 10. The const keyword currently declares the constant in the function scope (like variables declared with var).
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function
An async function can contain an await expression that pauses the execution of the async function to wait for the passed Promise's resolution, then resumes the async function's execution and evaluates as the resolved value. The await keyword is only valid inside async functions.52%
https://www.lynda.com/JavaScript-tutorials/Const-keyword/424003/459175-4.html
- Much like the let keyword, we can use const…as an alternative when declaring variables.…The const keyword is short for constant…and allows us to set constant variables…that shouldn't be reassigned.…On line six here, I'm going to create a constant variable…called birthYear and I'm going to set this equal to a year.…Beneath this ...
https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Statements/for...of
variable may be declared with const, let, or var. iterable Object whose iterable properties are iterated. Examples Iterating over an Array const iterable = [10, 20, 30]; for (const value of iterable) { console.log(value); } // 10 // 20 // 30 You can use let instead of const too, if …
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