javascript unicode转义字符相互转化

unicodeSequence.js

function fromUnicode (str) {
    var runicode = /\\u([a-f0-9]{4})/gi;
    str += '';
    return str.replace(runicode, function (m, hex) {
        return String.fromCharCode(parseInt(hex, 16));
    });
}

function toUnicode (str) {
    str += '';
    var result = [],
    unicode;
    for (var i = 0, len = str.length; i < len; i = i + 1) {
        // The unicode format is `\u{hexCharCode}`
        // If the `String(hexCharCode).length < 4`, left pad with '0'.
        unicode = str.charCodeAt(i).toString(16);
        unicode = '\\u0000'.slice(0, -unicode.length) + unicode;
        result.push(unicode);
    }
    return result.join('');
}

console.log(fromUnicode("\\u8F7F\\u8F66"));//轿车
console.log(String.fromCharCode(23458));//客
console.log("客".charCodeAt(0).toString(16));//5ba2
console.log(toUnicode("客"));//\u5ba2