Polyfill for Utf8toUtf16 for JavaScript

Shang Erxin — Tue, 20 Sep 2016 09:30:50 +0000

As we know the TextEncoder will drop support utf-16 and other legacy encoding types from Mozilla. Google also confirmed it and Chrome will only remain support utf-16 encoding.

Here is a polyfill implementation for convert utf-8 string to utf-16le

Utf8toUtf16 Polyfill

function utf8ToUtf16(s) {
	var a = new Uint8Array(s.length * 2),
	view = new DataView(a.buffer);
	s.split('').forEach(function (c, i) {
		//the third parameter equal to true indicate little ending
		view.setUint16(i * 2, c.charCodeAt(0), true);
	});
	return a;
}

Reference:
https://bugzilla.mozilla.org/show_bug.cgi?id=1257877
https://www.chromestatus.com/feature/5630760492990464

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Polyfill for Utf8toUtf16 for JavaScript