charCodeAt vs codePointAt

    /**
     * Character Codes and Code Points
     * str.charCodeAt(index) //good for UTF-8  (0 - 65535 or 0xFFFF)
     * str.codePointAt(index) //better for UTF-16 (0 - 1114111 or 0x10FFFF)
     * str.charAt(index)
     *
     * String.fromCharCode(code) //good for UTF-8 (0 - 65535 of 0xFFFF)
     * String.fromCodePoint(code) //better for UTF-16 (0 - 1114111 or 0x10FFFF)
     */
    
    let emojis = "😆😀😂🍔🔥❤";
    let str = "ab🔥C";
    
    console.log(str.length);
    console.log(
      str.charAt(0),
      str.charAt(1),
      str.charAt(2),
      str.charAt(3),
      str.charAt(4)
    );
    
    let cs = str.charCodeAt(0);
    console.log(cs, cs.toString(16));
    
    let cca = emojis.charCodeAt(0);
    let cpa = emojis.codePointAt(0);
    console.log(cca, cpa, cca.toString(16), cpa.toString(16));
    
    let char3 = String.fromCharCode(cs);
    console.log(char3);
    let char1 = String.fromCharCode(cca);
    let char2 = String.fromCodePoint(cpa);
    console.log(char1, char2);