JSFiddle - React, Tailwind, and code Playground

by xxxvvvxxx

HTML

E-mail:<br>
<input type="text" id="email1">
<br><br>
Re-enter E-mail: <br>
<input type="text" id="email2">
<br><br><br>
<input type="button" value="제출" onclick="validate()">

JavaScript

function validate() {
	email1 = document.getElementById("email1");
	email2 = document.getElementById("email2");
	if ( email1.value == "" )
		alert("이메일을 입력하세요");
	else {
		if (email1.value != email2.value)
			alert("일치하지 않습니다.");
		else
			alert("감사합니다.");
	}
}