stringToCodePoints.js

function stringToCodePoints (string) {
	function charToCodePoint (char) {
		// "brute-force"
		let codePoint = 0;
		while (char !== String.fromCodePoint(codePoint)) {
			// will throw for codePoint exceeding legal range
			++codePoint;
		}
		return codePoint;
	};
	return Array.from(string).map(charToCodePoint);
}