Check if a URL has Query Parameters in JavaScript

Check if a URL has Query Parameters #

To check if a url has query parameters, call the includes() method on the string, passing it a question mark as a parameter, e.g. str.includes('?'). If the url contains query parameters, the includes method will return true, otherwise false is returned.

Copied!
const url = 'https://example.com?page=10&limit=5';

function hasQueryParams(url) {
  return url.includes('?');
}

// 👇️ true
console.log(hasQueryParams('https://example.com?page=10&limit=5'));

// 👇️ false
console.log(hasQueryParams('https://example.com'));

We created a reusable function that takes a URL string and checks whether it contains query parameters.

The String.includes method allows us to check if a substring is contained in a string.

If the string contains a question mark, we can conclude that it has query parameters.

The includes method returns a boolean result:

• true if the substring is contained in the string
• false if it isn't

An alternative approach would be use the indexOf() method.

Check if a URL has Query Parameters using indexOf #

To check if a url has query parameters, call the indexOf() method on the url, passing it a question mark, and check if the result is not equal to -1, e.g. url.indexOf('?') !== -1. The indexOf method will return -1 if the string contains no query parameters.

Copied!
const url = 'https://example.com?page=10&limit=5';

function hasQueryParams(url) {
  return url.indexOf('?') !== -1;
}

// 👇️ true
console.log(hasQueryParams('https://example.com?page=10&limit=5'));

// 👇️ false
console.log(hasQueryParams('https://example.com'));

The String.indexOf method allows us to check if the string contains a question mark.

We used the strict equality (===) operator to check if the indexOf method does not return -1.