js url decoder

// 编码示例
let encodedUrl = encodeURIComponent('https://example.com/search?q=JavaScript教程&lang=zh-CN');
console.log(encodedUrl); // 输出: https%3A%2F%2Fexample.com%2Fsearch%3Fq%3DJavaScript%E6%95%99%E7%A8%8B%26lang%3Dzh-CN

// 解码示例
let decodedUrl = decodeURIComponent(encodedUrl);
console.log(decodedUrl); // 输出: https://example.com/search?q=JavaScript教程&lang=zh-CN

let encodedUrl = 'https%3A%2F%2Fexample.com%2Fsearch%3Fq%3D%E6%95%99%E7%A8%8B'; // 使用UTF-8编码的URL
let decodedUrl = decodeURIComponent(encodedUrl);
console.log(decodedUrl); // 输出: https://example.com/search?q=教程

let encodedUrl = 'invalid%url'; // 无效的URL编码

try {
    let decodedUrl = decodeURIComponent(encodedUrl);
    console.log(decodedUrl);
} catch (e) {
    console.error('解码失败:', e.message);
}