arrays - Substitute for Uint8Array in javascript?

Question

Since my javascript program is going to upload documents to the server using the FormData object, and the documents are in base64 format, I need to convert a base64 string to a byte array, and this link seems to be the correct one for that:

Convert base64 string to ArrayBuffer:

function _base64ToArrayBuffer(base64) {
    var binary_string = window.atob(base64);
    var len = binary_string.length;
    var bytes = new Uint8Array(len);
    for (var i = 0; i < len; i++) {
        bytes[i] = binary_string.charCodeAt(i);
    }
    return bytes.buffer;
}

Unfortunately, my program depends on an older version of javascript which doesn't define Uint8Array. Does anyone know if there's a alternative way of accomplishing what I want or if there is an alternative to Uint8Array that I can use?

thanks

question from:https://stackoverflow.com/questions/66067474/substitute-for-uint8array-in-javascript

Answer 1

Unluckly it seems that you don't have access to TypedArrays and their buffers, so you can use a simple array.

function _base64ToArray(base64) {
    var binary_string = window.atob(base64);
    var bytes = [];
    for (var i = 0; i < binary_string.length; i++) {
        bytes.push(binary_string.charCodeAt(i));
    }
    return bytes;
}

Using an array is it not the same as a buffer, but I hope this can solve your problem anyway.