set method

void set(
  1. String name,
  2. JSAny blobValueOrValue, [
  3. String filename
])

The set() method of the FormData interface sets a new value for an existing key inside a FormData object, or adds the key/value if it does not already exist.

The difference between set() and FormData.append is that if the specified key does already exist, set() will overwrite all existing values with the new one, whereas append() will append the new value onto the end of the existing set of values.

Implementation

external void set(
  String name,
  JSAny blobValueOrValue, [
  String filename,
]);