EN
JavaScript - convert bytes array to string (UTF-8)
10 points
In this short article, we would like to show, how to convert UTF-8 bytes array to string using JavaScript.
This example works under older web borsers and Node.js.
xxxxxxxxxx1
const getCode = (byte) => {2
const text = byte.toString(16);3
if (byte < 16) {4
return '%0' + text;5
}6
return '%' + text;7
};8
9
const toString = (bytes) => {10
var result = '';11
for (var i = 0; i < bytes.length; ++i) {12
result += getCode(bytes[i]);13
}14
return decodeURIComponent(result);15
};16
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// Usage example:19
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const bytes = [83, 111, 109, 101, 32, 116, 101, 120, 116, 32, 104, 101, 114, 101, 46, 46, 46];21
const string = toString(bytes);22
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console.log(string);Short version:
xxxxxxxxxx1
const toString = (bytes) => {2
var result = '';3
for (var i = 0; i < bytes.length; ++i) {4
const byte = bytes[i];5
const text = byte.toString(16);6
result += (byte < 16 ? '%0' : '%') + text;7
}8
return decodeURIComponent(result);9
};
In this example, used solution appeard in major web browsers around 2014 and in Node.js v11.
xxxxxxxxxx1
const decoder = new TextDecoder('UTF-8');2
3
const toString = (bytes) => {4
const array = new Uint8Array(bytes);5
return decoder.decode(array);6
};7
8
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// Usage example:10
11
const bytes = [83, 111, 109, 101, 32, 116, 101, 120, 116, 32, 104, 101, 114, 101, 46, 46, 46];12
const string = toString(bytes);13
14
console.log(string);
