Available on HTML5
FormData interface provides a way to easily construct a set of key/value pairs representing form fields and their values, which can then be easily sent using the
XMLHttpRequest.send() method. It uses the same format a form would use if the encoding type were set to
Returns the first value associated with a given key from within a
Returns an array of all the values associated with a given key from within a
Returns a boolean stating whether a
FormData object contains a certain key/value pair.