hex to string 16进制转字符串

   <script>

        function utf8HexToStr(str) {
            str = str.replaceAll(" ","");
            console.log(str);
            var arr = [];
            for (var i = 0; i < str.length; i += 2) {
                arr.push(parseInt(str.substring(i, i + 2), 16));
            }
            if (typeof arr === 'string') {
                return arr;
            }
            var UTF = '', _arr = arr;
            for (var i = 0; i < _arr.length; i++) {
                var one = _arr[i].toString(2), v = one.match(/^1+?(?=0)/);
                if (v && one.length == 8) {
                    var bytesLength = v[0].length;
                    var store = _arr[i].toString(2).slice(7 - bytesLength);
                    for (var st = 1; st < bytesLength; st++) {
                        store += _arr[st + i].toString(2).slice(2);
                    }
                    UTF += String.fromCharCode(parseInt(store, 2));
                    i += bytesLength - 1;
                } else {
                    UTF += String.fromCharCode(_arr[i])
                }
            }
            return UTF;
        }
        console.log(utf8HexToStr("73 6F 73 20 63 61 6C 6C 0D 0A"));

    </script>