How to determine whether to log in or not and determine the page jump

This article describes how to judge whether to log in or not and determine whether to jump to the page. Share it for your reference. The details are as follows:

Use session storage to determine whether the user is logged in, thereby determining which page the page will jump to.

Determine whether there is a customerID locally:

 function jumpTo(p, url) { var customerId=sessionStorage.customerId; if (customerId == undefined) { p.attr("href", "page/Login/login.html"); <span style="white-space:pre"> </span>} else { p.attr("href", url); } } function infoJumpTo() { var $info = $("#info"); jumpTo($info, "http://localhost/page/AmountAscension/amountAscension.html"); } function starJumpTo() { var $star = $("#star"); jumpTo($star, "http://localhost/page/MyAccount/myAccount.html"); }

In html, in the corresponding A tag, just write onclick="infoJumpTo" and so on.

But how is the customerID of the login page stored in the local session?

 function confirm(){ var tel=$tel.val();//Get the login name and password in the page var pwd=$pwd.val(); if(tel==""|| pwd==""){//Judge that both are not empty (other judgment rules have been judged when they are entered) alert("The mobile phone number and password cannot be empty!") return false; }else{//All the above meet the requirements, then call the login esb interface $.ajax({ url:config.baseServerUrl + '/account/login',//The corresponding esb interface address type:'post', data:{mobile:tel,password:pwd},//Parameters passed to the server (interface) success:function(data){//Data returned by the server (interface) if(data.success){//If the returned information indicates that the submitted information is the correct var customerId = data.attr.customerInfo.id;//Assign the ID of the user information in the data to the variable sessionStorage.customerId = customerId;//Storage the variable in the local sessionStorage, and the value is customerID window.location.href='http://localhost/index.html';//After login correctly, the page jumps to} else{//If the information provided by the returned information is incorrect if(tel != data.tel){//Defend it is the user name or password incorrectly, prompt the corresponding information alert(data.message); $tel.val(""); $pwd.val(""); return false; } if(pwd != data.pwd){ alert(data.message); $pwd.val(""); return false; } } } }) } }

On the login page, people are usually used to click enter directly to avoid manually clicking on the login button after entering the information. The js code is as follows:

 //Judge whether the Enter key $(document).keyup(function(event){ if(event.keyCode ==13){ $("#login").trigger("click"); } });

I hope this article will be helpful to everyone's JavaScript programming.