JSFiddle - React, Tailwind, and code Playground

by madroller

HTML

<p id="txt">

JavaScript

// adopted from:
//   http://www.onicos.com/staff/iz/amuse/javascript/expert/utf.txt

/* utf.js - UTF-8 <=> UTF-16 convertion
 *
 * Copyright (C) 1999 Masanao Izumo <[email protected]>
 * Version: 1.0
 * LastModified: Dec 25 1999
 * This library is free.  You can redistribute it and/or modify it.
 */

function Utf8ArrayToStr(array) {
    var out, i, len, c;
    var char2, char3;

    out = "";
    len = array.length;
    i = 0;
    while(i < len) {
	c = array[i++];
	switch(c >> 4)
	{ 
	  case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
	    // 0xxxxxxx
	    out += String.fromCharCode(c);
	    break;
	  case 12: case 13:
	    // 110x xxxx   10xx xxxx
	    char2 = array[i++];
	    out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
	    break;
	  case 14:
	    // 1110 xxxx  10xx xxxx  10xx xxxx
        char2 = array[i++];
	    char3 = array[i++];
	    out += String.fromCharCode(((c & 0x0F) << 12) |
					   ((char2 & 0x3F) << 6) |
					   ((char3 & 0x3F) << 0));
	    break;
	}
    }

    return out;
}


var array = new Uint8Array(3);
array[0] = 0x1F600;
array[1] = 0x82;
array[2] = 0xac;

document.getElementById("txt").textContent = Utf8ArrayToStr(array);