url：

http://localhost:81/login?redirect=%2Findex&access_token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJvdUV4dGVybmFsSWQiOiI0OTI2MjYzMTIxMDU1NDAxMTM4IiwiYXVkIjpbImVudGVycHJpc2VfbW9iaWxlX3Jlc291cmNlIiwiYmZmX2FwaV9yZXN

截取參數：?

 let url = window.location.href ;             //獲取當前urllet  dz_url = url.split('#')[0];                //獲取#/之前的字符串let  cs = dz_url.split('?')[1];                //獲取?之后的參數字符串let  cs_arr = cs.split('&');                    //參數字符串分割為數組let params = {};
// 遍歷數組，將鍵值對保存到params對象中cs_arr.forEach(pair => {let keyValue = pair.split('=');params[keyValue[0]] = keyValue[1];});
// 提取access_token的值let accessToken = params['access_token'];

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