Web Reference: Sep 29, 2018 · The main thing was that you must consider arrays and handle their special case, as they also enter the "typeof === 'object'" loop in javascript. You should also handle the special case where you have an empty object value within your nested object. The append() method of the FormData interface appends a new value onto an existing key inside a FormData object, or adds the key if it does not already exist. To append a nested object to a FormData object in JavaScript, you can convert the nested object to JSON and then append it as a single value. Here's how you can do it:
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