Check valid date format in JavaScript?

Javascript Web Development Object Oriented Programming

To check for valid date format, match the date with −

const dateFormat = /^\d{4}\-\d{2}\-\d{2}$/;

Example

Live Demo

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initialscale=1.0">
<title>Document</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<style>
   .check-valid-date {
      border: 1px solid red;
   }
</style>
</head>
<body>
<input type="date" id="check-valid-date" class="form-control
calender-black" name="dateCalender">
<script>
   const dateFormat = /^\d{4}\-\d{2}\-\d{2}$/;
   document.getElementById("check-valid-date").addEventListener("change",
   checkingForValidDate);
   function checkingForValidDate() {
      console.log(this.value, dateFormat.test(this.value));
      this.classList.toggle('check-valid-date',
      dateFormat.test(this.value));
   }
</script>
</body>
</html>

To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.