Web Reference: It includes a simple example of checking file size before uploading. I also made a JS Bin where you can experiment and see what data is inside of a FormData object if it helps. The FormData object lets you compile a set of key/value pairs to send using the Fetch or XMLHttpRequest API. It is primarily intended for use in sending form data, but can be used independently from forms in order to transmit keyed data. The transmitted data is in the same format that the form's submit() method would use to send the data if the for... Feb 12, 2023 · You can get the size of a FormData payload by iterating through its items and conditionally calculating size dependent upon data type.
YouTube Excerpt: Source code: https://openjavascript.info/2023/02/12/
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