HTML DOM Input Number defaultValue Property

The HTML DOM input number defaultValue property returns and modify the default value of input field of type=”number” in a HTML document.

Syntax

Following is the syntax minus;

Returning default value

object.defaultValue

modifying default value

object.defaultValue=”number”

Example

Let us see an example of HTML DOM input number defaultValue 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:1.2rem;
   }
   input{
      width:35%;
      border:2px solid #fff;
      background-color:transparent;
      color:#fff;
      font-weight:bold;
      padding:8px;
   }
   .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;
      font-weight:bold;
   }
</style>
</head>
<body>
<h1>DOM Input number defaultValue Example</h1>
<p>Hi, Enter your day of birth</p>
<input type="number" class="numberInput">
<button onclick="changeValue()" class="btn">Submit</button>
<div class="show"></div>
<script>
   function changeValue() {
      var numberInput = document.querySelector(".numberInput");
      var showMsg = document.querySelector(".show");
      numberInput.defaultValue = "20";
      numberInput.value= numberInput.defaultValue;
      showMsg.innerHTML ="Tada! I changed your day of birth into mine!";
   }
</script>
</body>
</html>

Output

This will produce the following result −

HTML DOM Input Number defaultValue Property

Enter your day of birth and then click on “Submit” button to change your value into default value.

HTML DOM Input Number defaultValue Property