The FormData.keys() method returns an iterator allowing to go through all keys contained in this object. The keys are string objects.
Note: This method is available in Web Workers.
FormData.keys()
Syntax
keys()
Return value
Returns an iterator.
Examples
// Create a test FormData object var formData = new FormData(); formData.append('key1', 'value1'); formData.append('key2', 'value2'); // Display the keys for (var key of formData.keys()) { console.log(key); }
The result is:
key1 key2
Specifications
No specification found
No specification data found for api.FormData.keys.
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Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
keys |
50
|
18
|
44
|
No
|
37
|
11.1
|
50
|
50
|
44
|
37
|
11.3
|
5.0
|
See also
© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/FormData/keys
