Javascript with Statement

Introduction

The with statement sets the scope of the code within a particular object.

The syntax is as follows: 

with (expression) statement;

The with statement was created as a convenience: 

let qs       = location.search.substring(1); 
let hostName = location.hostname; 
let url      = location.href;

Here, the location object is used on every line.

This code can be rewritten using the with statement as follows: 

with(location) {
    let qs = search.substring(1);
    let hostName = hostname;
    let url = href;
}

In strict mode, the with statement is not allowed and is considered a syntax error.




PreviousNext

Related