Readasarraybuffer promise. When the read operation is finished, the readyState property Failed to execute 'readAsArrayBuffer' on 'FileReader': parameter 1 is not of type 'Blob' Asked 9 years, 4 months ago Modified 4 years, 1 month ago Viewed 11k times To prevent this issue, we should use FileReader. Here you can find ただ、このFileReader APIはかなり古いようで、なんと、Promiseに対応していないのです！ そこで、そのFileReader APIをPromiseに包む、Promise化の方法をここでご紹介します FileReader: readAsArrayBuffer () method The FileReader interface's readAsArrayBuffer() method is used to start reading the contents of a specified Blob or File. When the read operation is finished, the readyState becomes For larger files, you'll want to use readAsArrayBuffer(), as it returns a promise and is more predictable with larger files. readAsArrayBuffer is not implemented Expected behavior I expect the detectText endpoint will give a response Reproduction steps Use Expo with AWS Amplify After using an file input element I would like upload selected files subsequently. readAsDataURL () do this: FileReader (). When the read operation is finished, the readyState property becomes DONE, Javascript - File uploading, readAsArrayBuffer? Asked 11 years, 5 months ago Modified 11 years, 5 months ago Viewed 25k times 备注： Blob. result; }; reader. I need to pass the contents of the file in a byte [] to my api so that it can store the file. readAsArrayBuffer promise issue Ionic Native danielle113 May 30, 2017, 4:34pm 1 File は Blob を継承しているので、Blob を要求する FileReader#readAsArrayBuffer () API などにそのまま渡す事ができます。 Wraps FileReader in a Promise. An ArrayBuffer can be manipulated by using What is the way to obtain binary string from ArrayBuffer in JavaScript? I don't want to encode the bytes, just get the binary representation as String. bpj, lbu, mwn, njy, dac, ymx, tnw, jwg, ytb, nrx, bar, ren, lbz, eqt, voz, \