vue H5获取微信登陆code

CodeBtn(){

    let _this=this;

    let appid = "xxxxxxxxx"; //公众平台appid

    const code = _this.getUrlParam('code'); //是否存在code

    let local = encodeURIComponent(window.location.href);//获取当前url

    if (code == null || code === "") {

        //不存在就打开上面的地址进行授权

        window.location.href =

          `https://open.weixin.qq.com/connect/oauth2/authorize?appid=${appid}&redirect_uri=${local}&response_type=code&scope=snsapi_userinfo&state=wecedirect`;

      }else{

        _this.code = code;

        _this.getOpenId(code);

      }

    },

},

// 获取url地址栏参数

getUrlParam(name) {

      var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");

      var rrr = decodeURIComponent(window.location.search);

      var r = rrr.substr(1).match(reg);

      if(r != null) return unescape(r[2]);

      return null;

},

getOpenId(){

    // 修改url参数以及设置参数

    window.history.replaceState({}, '','http://www.wkjiankang.com');

}