How to send a Mulitpart POST using XMLHTTPRequest

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Here’s an example of how to send a multipart POST containing binary data using XMLHTTPRequest: const xhr = new XMLHttpRequest(); const url = 'https://example.com' ; // (assume dataView contains binary audio data) const dataView = new DataView(buffer); xhr.open( 'POST' , url, true ); xhr.responseType = 'arraybuffer' ; xhr.onload = (event) => { console.log(xhr.response); }; xhr.onerror =…

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