FormData: keys() method
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Note: This feature is available in Web Workers.
The FormData.keys()
method returns an iterator which iterates through all keys contained in the FormData
. The keys are strings.
Syntax
js
keys()
Parameters
None.
Return value
Examples
js
const formData = new FormData();
formData.append("key1", "value1");
formData.append("key2", "value2");
// Display the keys
for (const key of formData.keys()) {
console.log(key);
}
The result is:
key1 key2
Specifications
No specification found
No specification data found for api.FormData.keys
.
Check for problems with this page or contribute a missing spec_url
to mdn/browser-compat-data. Also make sure the specification is included in w3c/browser-specs.
Browser compatibility
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