在不使用 PHP 的情况下单击表单中的提交（输入类型）后，如何使用 javascript 在页面上显示消息

Question

How to display a message after clicking on submit in javascript without using PHP.

Answer 1

Follow below steps

1. create a empty div to display error like below. set initial style as display: none

Like Below

<div id="msgDiv" class="message"></div>

2. On Submission of page just set innerHTML value to whatever message you want and display inside msgDiv div and apply style as display: block

Like Below

document.getElementById("msgDiv").innerHTML = "Message ";

Answer 2

There is something missing in your question (which message do you mean?), but this came me on mind:

document.querySelector("form").addEventListener("submit", function(){alert("message");});