WeChat public account development implements sample code to return to the chat interface by clicking the return button

pushHistory();
function pushHistory() {
 var state = {
  title: "title",
  url: "#"
 };
 window.history.pushState(state, "title", "#");
}
if (typeof window.addEventListener != "undefined") {
 window.addEventListener("popstate", function (e) {
 WeixinJSBridge.call('closeWindow');
 }, false);
} else {
 window.attachEvent("popstate", function (e) {
 WeixinJSBridge.call('closeWindow');
 });
}
 pushHistory();
 function pushHistory() {
  var state = {
  title: "title",
  url: "#"
  };
  window.history.pushState(state, "title", "#");
 }
 $(function() {
  wx.config({
  debug: false, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
  appId: '@ViewBag.AppID', // 必填，公众号的唯一标识
  timestamp: '@ViewBag.TimeStamp', // 必填，生成签名的时间戳
  nonceStr: '@ViewBag.NonceStr', // 必填，生成签名的随机串
  signature: '@ViewBag.Signature', // 必填，签名，见附录1
  jsApiList: [
   'checkJsApi',
   'hideOptionMenu',
   'scanQRCode',
   'closeWindow'
   ] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
  });
  wx.ready(function() {
  wx.hideOptionMenu();
  });
  if (typeof window.addEventListener != "undefined") {
  window.addEventListener("popstate", function(e) {
   wx.closeWindow();
  }, false);
  } else {
  window.attachEvent("popstate", function(e) {
   wx.closeWindow();
  });
  }
 });