TypeScript - convert bytes array to string

In this short article, we would like to show, how to convert bytes array to string using TypeScript.

Hint: below solution works under web browser and Node.js TypeScript.

1. from UTF-8 bytes:

const toText = (bytes: number[]): string => {
    let result = '';
    for (let i = 0; i < bytes.length; ++i) {
        const byte = bytes[i];
        const text = byte.toString(16);
        result += (byte < 16 ? '%0' : '%') + text;
    }
    return decodeURIComponent(result);
};


// Usage example:

const bytes: number[] = [83, 111, 109, 101, 32, 116, 101, 120, 116, 32, 104, 101, 114, 101, 46, 46, 46];
const text: string = toText(bytes);

console.log(text);

Output:

Some text here...

Short version

const toText = (bytes: number[]): string => {
    let result = '';
    for (let i = 0; i < bytes.length; ++i) {
        const byte = bytes[i];
        const text = byte.toString(16);
        result += (byte < 16 ? '%0' : '%') + text;
    }
    return decodeURIComponent(result);
};

See also

1. TypeScript - convert string to bytes array

2. TypeScript - convert string to bytes array under Node.js