Date: 2021jan8 Language: javaScript Q. javaScript: serialize a FormData object A. Use URLSearchParams to convert to application/x-www-form-urlencoded

const formdata = new FormData(event.target); formdata.append('userid', 'jeff'); formdata.append('password', 'amazon');

const query = new URLSearchParams(formdata).toString(); console.log('query=' + query);

Will log

userid=jeff&password=amazon

You cannot do this for files in a FormData.