// 编码
var url = "https://www.example.com/?name=张三&age=25";
var encodedUrl = encodeURIComponent(url);
// encodedUrl的值为"https%3A%2F%2Fwww.example.com%2F%3Fname%3D%E5%BC%A0%E4%B8%89%26age%3D25"
// 解码
var decodedUrl = decodeURIComponent(encodedUrl);
// decodedUrl的值为"https://www.example.com/?name=张三&age=25"