js implements WeChat sharing code_javascript skills

Usually when I want to share a page with friends through WeChat, the title and description displayed are not what I want. I checked some information and found that it is controlled through js
The display effect is as follows:

Title, description, and shared pictures are all controlled by js.
The js code is as follows

<script>
    var dataForWeixin = {
      appId: "",
      MsgImg: "Christmas/201012189457639.gif",//显示图片
      TLImg: "Christmas/201012189457639.gif",//显示图片
      url: "Christmas/6.html&#63;stra=!u738B!u4F1F",//跳转地址
      title: "将我的思念和祝福送给您,颐养源祝大家圣诞快乐",//标题内容
      desc: "将我的思念和祝福送给您,颐养源祝大家圣诞快乐",//描述内容
      fakeid: "",
      callback: function () { }
    };
    (function () {
      var onBridgeReady = function () {
        WeixinJSBridge.on('menu:share:appmessage', function (argv) {
          WeixinJSBridge.invoke('sendAppMessage', {
            "appid": dataForWeixin.appId,
            "img_url": dataForWeixin.MsgImg,
            "img_width": "120",
            "img_height": "120",
            "link": dataForWeixin.url,
            "desc": dataForWeixin.desc,
            "title": dataForWeixin.title
          }, function (res) { (dataForWeixin.callback)(); });
        });
        WeixinJSBridge.on('menu:share:timeline', function (argv) {
          (dataForWeixin.callback)();
          WeixinJSBridge.invoke('shareTimeline', {
            "img_url": dataForWeixin.TLImg,
            "img_width": "120",
            "img_height": "120",
            "link": dataForWeixin.url,
            "desc": dataForWeixin.desc,
            "title": dataForWeixin.title
          }, function (res) { });
        });
        WeixinJSBridge.on('menu:share:weibo', function (argv) {
          WeixinJSBridge.invoke('shareWeibo', {
            "content": dataForWeixin.title,
            "url": dataForWeixin.url
          }, function (res) { (dataForWeixin.callback)(); });
        });
        WeixinJSBridge.on('menu:share:facebook', function (argv) {
          (dataForWeixin.callback)();
          WeixinJSBridge.invoke('shareFB', {
            "img_url": dataForWeixin.TLImg,
            "img_width": "120",
            "img_height": "120",
            "link": dataForWeixin.url,
            "desc": dataForWeixin.desc,
            "title": dataForWeixin.title
          }, function (res) { });
        });
      };
 
      if (document.addEventListener) {
        document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
      } else if (document.attachEvent) {
        document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
        document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
      }
    })();
</script>

Another WeChat sharing js code:

/**!
 * 微信内置浏览器的Javascript API，功能包括：
 *
 * 1、分享到微信朋友圈
 * 2、分享给微信好友
 * 3、分享到腾讯微博
 * 4、新的分享接口，包含朋友圈、好友、微博的分享（for iOS）
 * 5、隐藏/显示右上角的菜单入口
 * 6、隐藏/显示底部浏览器工具栏
 * 7、获取当前的网络状态
 * 8、调起微信客户端的图片播放组件
 * 9、关闭公众平台Web页面
 */
var WeixinApi = (function () {

  "use strict";

  /**
   * 分享到微信朋友圈
   * @param    {Object}  data    待分享的信息
   * @p-config  {String}  appId   公众平台的appId（服务号可用）
   * @p-config  {String}  imgUrl   图片地址
   * @p-config  {String}  link    链接地址
   * @p-config  {String}  desc    描述
   * @p-config  {String}  title   分享的标题
   *
   * @param    {Object}  callbacks 相关回调方法
   * @p-config  {Boolean}  async          ready方法是否需要异步执行，默认false
   * @p-config  {Function} ready(argv)       就绪状态
   * @p-config  {Function} dataLoaded(data)    数据加载完成后调用，async为true时有用，也可以为空
   * @p-config  {Function} cancel(resp)  取消
   * @p-config  {Function} fail(resp)   失败
   * @p-config  {Function} confirm(resp)  成功
   * @p-config  {Function} all(resp)    无论成功失败都会执行的回调
   */
  function weixinShareTimeline(data, callbacks) {
    callbacks = callbacks || {};
    var shareTimeline = function (theData) {
      WeixinJSBridge.invoke('shareTimeline', {
        "appid":theData.appId ? theData.appId : '',
        "img_url":theData.imgUrl,
        "link":theData.link,
        "desc":theData.title,
        "title":theData.desc, // 注意这里要分享出去的内容是desc
        "img_width":"640",
        "img_height":"640"
      }, function (resp) {
        switch (resp.err_msg) {
          // share_timeline:cancel 用户取消
          case 'share_timeline:cancel':
            callbacks.cancel && callbacks.cancel(resp);
            break;
          // share_timeline:confirm 发送成功
          case 'share_timeline:confirm':
          case 'share_timeline:ok':
            callbacks.confirm && callbacks.confirm(resp);
            break;
          // share_timeline:fail　发送失败
          case 'share_timeline:fail':
          default:
            callbacks.fail && callbacks.fail(resp);
            break;
        }
        // 无论成功失败都会执行的回调
        callbacks.all && callbacks.all(resp);
      });
    };
    WeixinJSBridge.on('menu:share:timeline', function (argv) {
      if (callbacks.async && callbacks.ready) {
        window["_wx_loadedCb_"] = callbacks.dataLoaded || new Function();
        if(window["_wx_loadedCb_"].toString().indexOf("_wx_loadedCb_") > 0) {
          window["_wx_loadedCb_"] = new Function();
        }
        callbacks.dataLoaded = function (newData) {
          window["_wx_loadedCb_"](newData);
          shareTimeline(newData);
        };
        // 然后就绪
        callbacks.ready && callbacks.ready(argv);
      } else {
        // 就绪状态
        callbacks.ready && callbacks.ready(argv);
        shareTimeline(data);
      }
    });
  }

  /**
   * 发送给微信上的好友
   * @param    {Object}  data    待分享的信息
   * @p-config  {String}  appId   公众平台的appId（服务号可用）
   * @p-config  {String}  imgUrl   图片地址
   * @p-config  {String}  link    链接地址
   * @p-config  {String}  desc    描述
   * @p-config  {String}  title   分享的标题
   *
   * @param    {Object}  callbacks 相关回调方法
   * @p-config  {Boolean}  async          ready方法是否需要异步执行，默认false
   * @p-config  {Function} ready(argv)       就绪状态
   * @p-config  {Function} dataLoaded(data)    数据加载完成后调用，async为true时有用，也可以为空
   * @p-config  {Function} cancel(resp)  取消
   * @p-config  {Function} fail(resp)   失败
   * @p-config  {Function} confirm(resp)  成功
   * @p-config  {Function} all(resp)    无论成功失败都会执行的回调
   */
  function weixinSendAppMessage(data, callbacks) {
    callbacks = callbacks || {};
    var sendAppMessage = function (theData) {
      WeixinJSBridge.invoke('sendAppMessage', {
        "appid":theData.appId ? theData.appId : '',
        "img_url":theData.imgUrl,
        "link":theData.link,
        "desc":theData.desc,
        "title":theData.title,
        "img_width":"640",
        "img_height":"640"
      }, function (resp) {
        switch (resp.err_msg) {
          // send_app_msg:cancel 用户取消
          case 'send_app_msg:cancel':
            callbacks.cancel && callbacks.cancel(resp);
            break;
          // send_app_msg:confirm 发送成功
          case 'send_app_msg:confirm':
          case 'send_app_msg:ok':
            callbacks.confirm && callbacks.confirm(resp);
            break;
          // send_app_msg:fail　发送失败
          case 'send_app_msg:fail':
          default:
            callbacks.fail && callbacks.fail(resp);
            break;
        }
        // 无论成功失败都会执行的回调
        callbacks.all && callbacks.all(resp);
      });
    };
    WeixinJSBridge.on('menu:share:appmessage', function (argv) {
      if (callbacks.async && callbacks.ready) {
        window["_wx_loadedCb_"] = callbacks.dataLoaded || new Function();
        if(window["_wx_loadedCb_"].toString().indexOf("_wx_loadedCb_") > 0) {
          window["_wx_loadedCb_"] = new Function();
        }
        callbacks.dataLoaded = function (newData) {
          window["_wx_loadedCb_"](newData);
          sendAppMessage(newData);
        };
        // 然后就绪
        callbacks.ready && callbacks.ready(argv);
      } else {
        // 就绪状态
        callbacks.ready && callbacks.ready(argv);
        sendAppMessage(data);
      }
    });
  }

  /**
   * 分享到腾讯微博
   * @param    {Object}  data    待分享的信息
   * @p-config  {String}  link    链接地址
   * @p-config  {String}  desc    描述
   *
   * @param    {Object}  callbacks 相关回调方法
   * @p-config  {Boolean}  async          ready方法是否需要异步执行，默认false
   * @p-config  {Function} ready(argv)       就绪状态
   * @p-config  {Function} dataLoaded(data)    数据加载完成后调用，async为true时有用，也可以为空
   * @p-config  {Function} cancel(resp)  取消
   * @p-config  {Function} fail(resp)   失败
   * @p-config  {Function} confirm(resp)  成功
   * @p-config  {Function} all(resp)    无论成功失败都会执行的回调
   */
  function weixinShareWeibo(data, callbacks) {
    callbacks = callbacks || {};
    var shareWeibo = function (theData) {
      WeixinJSBridge.invoke('shareWeibo', {
        "content":theData.desc,
        "url":theData.link
      }, function (resp) {
        switch (resp.err_msg) {
          // share_weibo:cancel 用户取消
          case 'share_weibo:cancel':
            callbacks.cancel && callbacks.cancel(resp);
            break;
          // share_weibo:confirm 发送成功
          case 'share_weibo:confirm':
          case 'share_weibo:ok':
            callbacks.confirm && callbacks.confirm(resp);
            break;
          // share_weibo:fail　发送失败
          case 'share_weibo:fail':
          default:
            callbacks.fail && callbacks.fail(resp);
            break;
        }
        // 无论成功失败都会执行的回调
        callbacks.all && callbacks.all(resp);
      });
    };
    WeixinJSBridge.on('menu:share:weibo', function (argv) {
      if (callbacks.async && callbacks.ready) {
        window["_wx_loadedCb_"] = callbacks.dataLoaded || new Function();
        if(window["_wx_loadedCb_"].toString().indexOf("_wx_loadedCb_") > 0) {
          window["_wx_loadedCb_"] = new Function();
        }
        callbacks.dataLoaded = function (newData) {
          window["_wx_loadedCb_"](newData);
          shareWeibo(newData);
        };
        // 然后就绪
        callbacks.ready && callbacks.ready(argv);
      } else {
        // 就绪状态
        callbacks.ready && callbacks.ready(argv);
        shareWeibo(data);
      }
    });
  }


  /**
   * 新的分享接口
   * @param    {Object}  data    待分享的信息
   * @p-config  {String}  appId   公众平台的appId（服务号可用）
   * @p-config  {String}  imgUrl   图片地址
   * @p-config  {String}  link    链接地址
   * @p-config  {String}  desc    描述
   * @p-config  {String}  title   分享的标题
   *
   * @param    {Object}  callbacks 相关回调方法
   * @p-config  {Boolean}  async          ready方法是否需要异步执行，默认false
   * @p-config  {Function} ready(argv,shareTo)       就绪状态
   * @p-config  {Function} dataLoaded(data)    数据加载完成后调用，async为true时有用，也可以为空
   * @p-config  {Function} cancel(resp,shareTo)  取消
   * @p-config  {Function} fail(resp,shareTo)   失败
   * @p-config  {Function} confirm(resp,shareTo)  成功
   * @p-config  {Function} all(resp,shareTo)    无论成功失败都会执行的回调
   */
  function weixinGeneralShare(data, callbacks) {
    callbacks = callbacks || {};
    var generalShare = function (general,theData) {

      // 如果是分享到朋友圈，则需要把title和desc交换一下
      if(general.shareTo == 'timeline') {
        var title = theData.title;
        theData.title = theData.desc || title;
        theData.desc = title;
      }

      // 分享出去
      general.generalShare({
        "appid":theData.appId ? theData.appId : '',
        "img_url":theData.imgUrl,
        "link":theData.link,
        "desc":theData.desc,
        "title":theData.title,
        "img_width":"640",
        "img_height":"640"
      }, function (resp) {
        switch (resp.err_msg) {
          // general_share:cancel 用户取消
          case 'general_share:cancel':
            callbacks.cancel && callbacks.cancel(resp ,general.shareTo);
            break;
          // general_share:confirm 发送成功
          case 'general_share:confirm':
          case 'general_share:ok':
            callbacks.confirm && callbacks.confirm(resp ,general.shareTo);
            break;
          // general_share:fail　发送失败
          case 'general_share:fail':
          default:
            callbacks.fail && callbacks.fail(resp ,general.shareTo);
            break;
        }
        // 无论成功失败都会执行的回调
        callbacks.all && callbacks.all(resp ,general.shareTo);
      });
    };
    WeixinJSBridge.on('menu:general:share', function (general) {
      if (callbacks.async && callbacks.ready) {
        window["_wx_loadedCb_"] = callbacks.dataLoaded || new Function();
        if(window["_wx_loadedCb_"].toString().indexOf("_wx_loadedCb_") > 0) {
          window["_wx_loadedCb_"] = new Function();
        }
        callbacks.dataLoaded = function (newData) {
          window["_wx_loadedCb_"](newData);
          generalShare(general,newData);
        };
        // 然后就绪
        callbacks.ready && callbacks.ready(general,general.shareTo);
      } else {
        // 就绪状态
        callbacks.ready && callbacks.ready(general,general.shareTo);
        generalShare(general,data);
      }
    });
  }

  /**
   * 加关注（此功能只是暂时先加上，不过因为权限限制问题，不能用，如果你的站点是部署在*.qq.com下，也许可行）
   * @param    {String}  appWeixinId   微信公众号ID
   * @param    {Object}  callbacks    回调方法
   * @p-config  {Function} fail(resp)   失败
   * @p-config  {Function} confirm(resp)  成功
   */
  function addContact(appWeixinId,callbacks){
    callbacks = callbacks || {};
    WeixinJSBridge.invoke("addContact", {
      webtype: "1",
      username: appWeixinId
    }, function (resp) {
      var success = !resp.err_msg || "add_contact:ok" == resp.err_msg || "add_contact:added" == resp.err_msg;
      if(success) {
        callbacks.success && callbacks.success(resp);
      }else{
        callbacks.fail && callbacks.fail(resp);
      }
    })
  }

  /**
   * 调起微信Native的图片播放组件。
   * 这里必须对参数进行强检测，如果参数不合法，直接会导致微信客户端crash
   *
   * @param {String} curSrc 当前播放的图片地址
   * @param {Array} srcList 图片地址列表
   */
  function imagePreview(curSrc,srcList) {
    if(!curSrc || !srcList || srcList.length == 0) {
      return;
    }
    WeixinJSBridge.invoke('imagePreview', {
      'current' : curSrc,
      'urls' : srcList
    });
  }

  /**
   * 显示网页右上角的按钮
   */
  function showOptionMenu() {
    WeixinJSBridge.call('showOptionMenu');
  }


  /**
   * 隐藏网页右上角的按钮
   */
  function hideOptionMenu() {
    WeixinJSBridge.call('hideOptionMenu');
  }

  /**
   * 显示底部工具栏
   */
  function showToolbar() {
    WeixinJSBridge.call('showToolbar');
  }

  /**
   * 隐藏底部工具栏
   */
  function hideToolbar() {
    WeixinJSBridge.call('hideToolbar');
  }

  /**
   * 返回如下几种类型：
   *
   * network_type:wifi   wifi网络
   * network_type:edge   非wifi,包含3G/2G
   * network_type:fail   网络断开连接
   * network_type:wwan   2g或者3g
   *
   * 使用方法：
   * WeixinApi.getNetworkType(function(networkType){
   *
   * });
   *
   * @param callback
   */
  function getNetworkType(callback) {
    if (callback && typeof callback == 'function') {
      WeixinJSBridge.invoke('getNetworkType', {}, function (e) {
        // 在这里拿到e.err_msg，这里面就包含了所有的网络类型
        callback(e.err_msg);
      });
    }
  }

  /**
   * 关闭当前微信公众平台页面
   */
  function closeWindow() {
    WeixinJSBridge.call("closeWindow");
  }

  /**
   * 当页面加载完毕后执行，使用方法：
   * WeixinApi.ready(function(Api){
   *   // 从这里只用Api即是WeixinApi
   * });
   * @param readyCallback
   */
  function wxJsBridgeReady(readyCallback) {
    if (readyCallback && typeof readyCallback == 'function') {
      var Api = this;
      var wxReadyFunc = function () {
        readyCallback(Api);
      };
      if (typeof window.WeixinJSBridge == "undefined"){
        if (document.addEventListener) {
          document.addEventListener('WeixinJSBridgeReady', wxReadyFunc, false);
        } else if (document.attachEvent) {
          document.attachEvent('WeixinJSBridgeReady', wxReadyFunc);
          document.attachEvent('onWeixinJSBridgeReady', wxReadyFunc);
        }
      }else{
        wxReadyFunc();
      }
    }
  }

  return {
    version     :"2.0",
    ready      :wxJsBridgeReady,
    shareToTimeline :weixinShareTimeline,
    shareToWeibo  :weixinShareWeibo,
    shareToFriend  :weixinSendAppMessage,
    generalShare  :weixinGeneralShare,
    addContact   :addContact,
    showOptionMenu :showOptionMenu,
    hideOptionMenu :hideOptionMenu,
    showToolbar   :showToolbar,
    hideToolbar   :hideToolbar,
    getNetworkType :getNetworkType,
    imagePreview  :imagePreview,
    closeWindow   :closeWindow
  };
})();

The above is the js code shared by WeChat. I hope it will be helpful to everyone's learning.