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 October 2018.
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
| Specification |
|---|
| XMLHttpRequest # interface-formdata |