FormData.keys() - Web APIs 编辑

The FormData.keys() method returns an iterator allowing to go through all keys contained in this object. The keys are USVString objects.

Note: This method is available in Web Workers.

Syntax

formData.keys();

Return value

Returns an iterator.

Example

// Create a test FormData object
var formData = new FormData();
formData.append('key1', 'value1');
formData.append('key2', 'value2');

// Display the keys
for (var key of formData.keys()) {
   console.log(key);
}

The result is:

key1
key2

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• XMLHTTPRequest
• Using XMLHttpRequest
• Using FormData objects
• <form>