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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 URLSearchParams.keys() method returns an iterator allowing to go through all keys contained in this object. The keys are USVString objects.

Note: This method is available in Web Workers.



Return value

Returns an iterator.


// Create a test URLSearchParams object 
var searchParams = new URLSearchParams("key1=value1&key2=value2"); 

// Display the key/value pairs 
for(var key of searchParams.keys()) { 

The result is:



Specification Status Comment
The definition of 'keys() (as iterator<>)' in that specification.
Living Standard Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support No support 44 (44) ? ? ?
Feature Android Android Webview Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support No support No support 44.0 (44) ? ? No support No support


See also

Document Tags and Contributors

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