why to use strict mode in javascript code example
Example 1: strict mode in javascript
/*
even though x is not defined with a keyword like var, let or const, the
browser won't throw an error
*/
x = 1;
function myFunc() {
"use strict";
/*
this will throw an error as y is being assigned a value without it
being declared AND "use strict" has been used for the function
*/
y = 4;
}
/*
Basically, "use strict" is a way for programmers to avoid bad habits by using
invalid syntax which browsers accept but is still wrong
*/
Example 2: use strict javascript
// File: myscript.js
'use strict';
var a = 2;
....