https://developer.mozilla.org/en-US/docs/Web/API/FormData
FormData - Web APIs | MDN
The FormData interface provides a way to construct a set of key/value pairs representing form fields and their values, which can be sent using the fetch(),...
web apisformdatamdn
https://caniuse.com/?search=ciu/wf-fetch-formdata
"ciu/wf-fetch-formdata" | Can I use... Support tables for HTML5, CSS3, etc
can i usesupport tableshtml5 css3wffetch
https://bugs.webkit.org/show_bug.cgi?id=225299
225299 – Constructing a FormData from a form can lead to entries with lone surrogates
formdataleadentriessurrogates