Headers: entries() method

{{APIRef("Fetch API")}} {{AvailableInWorkers}}

The Headers.entries() method returns an {{jsxref("Iteration_protocols",'iterator')}} allowing to go through all key/value pairs contained in this object. Both the key and value of each pair are {{jsxref("String")}} objects.

Syntax

entries()

Parameters

None.

Return value

Returns an {{jsxref("Iteration_protocols","iterator")}}.

Examples

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

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

The result is:

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

Browser compatibility

{{Compat}}

See also

• ServiceWorker API
• HTTP access control (CORS)
• HTTP