strict.md

Strict

In an effort to write "secure" JavaScript code, apply the "use strict" directive and break bad programming habits.

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode

JavaScript

Right:

function foo () {
  'use strict';
  var x = 'test';
}

Wrong:

function foo () {
  x = 'test';
}