use-strict

Introduction “Use strict” is a directive that is used to enable strict mode in JavaScript. Strict mode is a way to opt-in to a restricted variant of JavaScript that helps to catch common coding mistakes and prevent them from becoming bugs. It is a way to ensure that code is written in a more secure … Read more

Update for ES6 modules Inside native ECMAScript modules (with import and export statements) and ES6 classes, strict mode is always enabled and cannot be disabled. Original answer This article about Javascript Strict Mode might interest you: John Resig – ECMAScript 5 Strict Mode, JSON, and More To quote some interesting parts: Strict Mode is a … Read more