Jan 20, 2014 · Recent (loosely used term) JavaScript engines actually compile JS code to get better performance, so using the const keyword would inform them that the optimizations …

Sep 25, 2008 · Is there a way to use constants in JavaScript? If not, what's the common practice for specifying variables that are used as constants?

Sep 5, 2012 · const defines a constant (in supporting browsers). Why would you expect to be able to change it? JavaScript will not throw an exception if you try to change the value of a const, …

Are there any limits to what types of values can be set using const in JavaScript, and in particular, functions? Is this valid? Granted it does work, but is it considered bad practice for any reason?

@rohan-patel 1) const is making the binding (or ‘link’) between the name of a variable and an object constant. If you use const, that variable name will always reference the same object. 2) …

Jun 17, 2017 · The const keyword makes a variable itself immutable, not its assigned content. When the content is an object, this means the object itself can still be altered. Therefore, it's …

Dec 11, 2016 · Why most of the time should I use const instead of let in JavaScript? As we know if we use const then we can't reassign value later. Then why not use let instead of const?

Jun 1, 2012 · How come constants cannot be set as properties of objects which are variables themselves? const a = 'constant' // all is well // set constant property of variable object const …

Dec 9, 2016 · const { email,title } = obj; This is ES6 syntax-the simpler one It will automatically assign the email and title from obj; just the name has to be correctly stated for the required field.

Mar 30, 2016 · const a = []; const b = {}; a.push['sup']; b.test = 'earth'; What I'm wondering is whether there's any convention for preferring let over const when it comes to arrays and …