JavaScript - convert Blob object to Uint8Array object (to bytes array)

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const toArray = (blob, callback) => {
    const reader = new FileReader();
    reader.onload = () => {
        callback(new Uint8Array(reader.result));
    };
    // reader.onerror = () => { /* ... */ };
    reader.readAsArrayBuffer(blob);
};


// Usage example:

const blob = ...;  // Blob object

toArray(blob, (array) => {
    console.log(`array.length=${array.length}`);
    console.log(`array[0]=${array[0]}`);
    console.log(`array[1]=${array[1]}`);
    console.log(`array[2]=${array[2]}`);
    console.log(`...`);
});


// See also:
//   1. https://dirask.com/snippets/JavaScript-convert-Blob-object-to-Uint8Array-object-to-bytes-array-1GMYbp