单击提交按钮后如何保持在同一页面上 [英] how to stay on the same page after clicking submit button

问题描述

我正在创建一个登录表单，如果任何输入错误，那么我想停留在同一页面上，并通知客户端输入正确的输入 我想留在此页面 http://localhost:8080/loginpage/，但是每次单击后我m重定向到

I'm creating a login form and in that if any input is wrong then i want to stay on the same page and notify the client to enter the correct input I want to stay on this page http://localhost:8080/loginpage/ but after every click i'm redirected to http://localhost:8080/loginpage/?UserName=UserName&pword=&ConfirmPassword=&Email=Email&FirstName=First+Name&LastName=Last+Name&cars=male&Signup=Signup .

我已经为此编写了一个代码，但是它似乎不起作用.

I have written a code for this but it does not seem to work.

if(t!==0)
 {
     var er="Email-id already exists";
     window.location.reload(false); 
     document.getElementById("nemail").value=er;
     document.getElementById("username").value=username;
     document.getElementById("pword").value="";
     document.getElementById("confpwd").value="";
     document.getElementById("fname").value=fname;
     document.getElementById("lname").value=lname;
     document.getElementById("gender").value=gender;
 }

我尝试使用其他几种方法，例如

I have tried to use several other methods like

 window.location.replace('/loginpage/');

 window.location.href="/loginpage/index.html";

但是它们都不起作用. 请帮忙！

But none of them works. Please help!

推荐答案

有两种方法可以阻止表单提交.

There are two ways to prevent a form to submit.

1. 设置表格onsubmit="return false".
2. 在from上注册一个提交事件.在回叫中event.preventDefault();

1. Set form onsubmit="return false".
2. Register a submit event on a from. In the callback call event.preventDefault();

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h2>1 way to prevent form to submit via onclick attribute</h2>
<form action="#submit-from-1-way" onsubmit="return validate(this)"><!--set onsubmit="return false"-->
    <input name="value"/>
    <button type="submit">Submit</button>
</form>

<h2>2 way to prevent form to submit via submit event</h2>
<form id="form" action="#submit-from-2-way"><!--set onsubmit="return false"-->
    <input name="value"/>
    <button type="submit">Submit</button>
</form>


<script>
    console.log(location.href+'#'+location.hash+'?'+location.search);
    function validate(form) {
        return $(form).find('input').val();
    }
    
    $('#form').submit(function (e) {
        if (!validate(this)) e.preventDefault();
    });
</script>

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