Conversion between UTF-8 ArrayBuffer and String

javascript string utf-8 arraybuffer
Tom Leese picture Tom Leese · Jun 19, 2013 · Viewed 114.6k times · Source

I have an ArrayBuffer which contains a string encoded using UTF-8 and I can't find a standard way of converting such ArrayBuffer into a JS String (which I understand is encoded using UTF-16).

I've seen this code in numerous places, but I fail to see how it would work with any UTF-8 code points that are longer than 1 byte.

return String.fromCharCode.apply(null, new Uint8Array(data));

Similarly, I can't find a standard way of converting from a String to a UTF-8 encoded ArrayBuffer.

Answer

PPB picture PPB · Dec 16, 2016

Using TextEncoder and TextDecoder

var uint8array = new TextEncoder("utf-8").encode("Plain Text");
var string = new TextDecoder().decode(uint8array);
console.log(uint8array ,string )

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