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FormData: keys() method - Web APIs

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

None.

An iterator of FormData's keys.

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

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