Generate random unicode string

random.js

random = function(length) {
	var array = new Uint16Array(length);
	window.crypto.getRandomValues(array);
	var str = '';
	for (var i = 0; i < array.length; i++) {
		str += String.fromCharCode(array[i]);
	};
	return str;
}

What about

const random_unicode_string = (length: number): string =>
      String.fromCharCode.apply(null, Array.from({length}, () => Math.floor(Math.random()*65536)))