Sep 25, 2008 · So for example doing this in the global scope will declare a pseudo constant value on the window (which is a really bad idea, you shouldn't declare global vars carelessly) …

Q: I am interested if there are any limits to what types of values can be set using const in JavaScript—in particular functions. Is this valid? Granted it does work, but is it considered bad …

Aug 4, 2016 · How to create a constant in javascript. 8. How to check that ES6 "variable" is constant? 16.

Jul 8, 2015 · By defining the constant in a block it will only exist for this block. Setting an object and unsetting keys By defining const obj = { /* keys */ } we define a value obj that is constant, …

Jun 1, 2012 · const a = 'constant' // all is well // set constant property of variable object const window.b = 'constant' // throws Exception // OR var App = {}; // want to be able to extend const …

Sep 18, 2015 · while the above cleverly adds a constant property to a class, the actual value for the constant is "outside" the class definition "{}", which really violates one of the definitions of …

Apr 8, 2016 · If you do this as above in global scope this will be a true constant, because you cannot overwrite the window object. I've created a library to create constants and immutable …

Sep 5, 2012 · None of the major browsers produce any notices or errors 2,3 if you assign another value to a constant [..] but the reassignment is unsuccessful (only) in Firefox and Chrome (at …

Nov 13, 2010 · Javascript doesn't really have the notion of a named constant, or an immutable property of an object. (Note that I'm not talking about ES5 here.) You can declare globals with …

May 12, 2017 · With considering all the above answers, you can also export your constant as well as a module in ES6: module.exports = yourConstant; and call it from your file: import …