HTML DOM Input Number required Property

The HTML DOM input number required property returns and modify whether the input number field must be filled out before submitting the form.

Syntax

Following is the syntax −

Returning required

object.required

Modifying required

object.required = true | false

Example

Let us see an example of HTML DOM input number required property −

<!DOCTYPE html>
<html>
<head>
<style>
   html{
      height:100%;
   }
   body{
      text-align:center;
      color:#fff;
      background: linear-gradient(62deg, #FBAB7E 0%, #F7CE68 100%) center/cover no-repeat;
      height:100%;
   }
   p{
      font-weight:700;
      font-size:1.1rem;
   }
   input{
      display:block;
      width:35%;
      border:2px solid #fff;
      background-color:transparent;
      color:#fff;
      font-weight:bold;
      padding:8px;
      margin:1rem auto;
   }
   .btn{
      background:#0197F6;
      border:none;
      height:2rem;
      border-radius:2px;
      width:35%;
      margin:2rem auto;
      display:block;
      color:#fff;
      outline:none;
      cursor:pointer;
   }
   .show{
      font-size:1.5rem;
      color:#db133a;
      font-weight:bold;
  }
</style>
</head>
<body>
<h1>DOM Input number required property Demo</h1>
<form action="">
<p>Hi, Enter your day of birth</p>
<input type="number" class="numberInput" required>
<input type="submit" onclick="checkInput()">
</form>
<div class="show"></div>
<script>
   function checkInput() {
      var numberInput = document.querySelector(".numberInput");
      if(numberInput.value === ''){
         document.querySelector(".show").innerHTML="Please Select";
      }
   }
</script>
</body>
</html>

Output

This will produce the following output −

HTML DOM Input Number required Property

Click on ”Submit” button without entering any value in input number field.

HTML DOM Input Number required Property