FormData.keys()

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

Note: This method is available in Web Workers.

Syntax

keys()

Parameters

None.

Return value

An iterator of FormData's keys.

Examples

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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Browser compatibility

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See also