Web/API/Headers/entries

The Headers.entries() method returns an iterator allowing to go through all key/value pairs contained in this object. The both the key and value of each pairs are ByteString objects.

Note: This method is available in Web Workers.

Syntax

headers.entries();

Return value

Returns an iterator.

Example

// Create a test Headers object
var myHeaders = new Headers();
myHeaders.append('Content-Type', 'text/xml');
myHeaders.append('Vary', 'Accept-Language');

// Display the key/value pairs
for (var pair of myHeaders.entries()) {
   console.log(pair[0]+ ': '+ pair[1]);
}

The result is:

content-type: text/xml
vary: Accept-Language

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`entries` Experimental'	Chrome Full support 45	Edge Full support 16	Firefox Full support 44	IE No support No	Opera Full support 32	Safari ?	WebView Android Full support 45	Chrome Android Full support 45	Firefox Android Full support 44	Opera Android Full support 32	Safari iOS No support No	Samsung Internet Android Full support 5.0

Legend

Full support: Full support
No support: No support
Compatibility unknown: Compatibility unknown
Experimental. Expect behavior to change in the future.': Experimental. Expect behavior to change in the future.