Headers: keys() Methode
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2017.
Hinweis: Diese Funktion ist in Web Workers verfügbar.
Die Headers.keys()
-Methode gibt einen
Iterator
zurück, der es ermöglicht, alle in diesem Objekt enthaltenen Schlüssel durchzugehen. Die Schlüssel sind String
-Objekte.
Syntax
js
keys()
Parameter
Keine.
Rückgabewert
Gibt einen Iterator
zurück.
Beispiele
js
// Create a test Headers object
const myHeaders = new Headers();
myHeaders.append("Content-Type", "text/xml");
myHeaders.append("Vary", "Accept-Language");
// Display the keys
for (const key of myHeaders.keys()) {
console.log(key);
}
Das Ergebnis ist:
content-type vary
Browser-Kompatibilität
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
keys |
Legend
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- Full support
- Full support
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.