Javascript strict mode

Introduction

Javascript has strict mode.

Strict mode is a different parsing and execution model for JavaScript.

To enable strict mode for an entire script, include the following at the top: 

"use strict";

To specify just a function to execute in strict mode by including the pragma at the top of the function body: 

function doSomething() { 
    "use strict"; 
    // function body 
}

Strict mode changes many parts of how JavaScript is executed.




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