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This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.


The has() method of the URLSearchParams interface returns a Boolean that indicates whether a parameter with the specified name exists.


var hasName = URLSearchParams.has(name)


The name of the parameter to find.


A Boolean.


let url = new URL('');
let params = new URLSearchParams(;

params.has('bar') === true; //true


Specification Status Comment
The definition of 'has()' in that specification.
Living Standard Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 49.0 (Yes) No support (Yes) ?
Feature Android Android Webview Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support No support 49.0 (Yes) No support (Yes) ? 49.0

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, rolfedh, jpmedley
 Last updated by: chrisdavidmills,