In this section, we will learn what the keys() method is and how to use it in JavaScript.

JavaScript URLSearchParams keys() Method

The `keys()` method is used to return all the keys in a query.

Note: the method takes no argument.

The return value of this method is actually an iterator object that contains all the keys in the target query.

URLSearchParams keys() Method Syntax:

searchParams.keys();

URLSearchParams keys() Method Parameter:

The method does not take an argument.

URLSearchParams keys() Method Return Value:

The return value of this method is an iterator that could be used to iterate through all the keys of the target query.

Example: using URLSearchParams keys() method in JavaScript

const searchParams = new URLSearchParams("?name=John&lastName=Doe&address=Mars&name=Omid");

for (const key of searchParams.keys()){

    console.log(key);

}

Output:

name

lastName

address

name