FormData: keys() method

The FormData.keys() method returns an iterator which iterates through all keys contained in the FormData. The keys are strings.

Note: This feature is available in Web Workers

Syntax

js
keys()

Parameters

None.

Return value

An iterator of FormData's keys.

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

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No specification data found for api.FormData.keys.
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Browser compatibility

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See also