The HTML DOM Input Date stepdown() method defines the amount of days the date field should decrease.
Syntax
Following is the syntax −
Calling stepDown method with a number, which by default is equal to 1
inputDateObject.stepDown(number)
Example
Let us see an example of Input Date stepDown method −
<!DOCTYPE html>
<html>
<head>
<title>Input Date stepDown()</title>
</head>
<body>
<form>
<div>
Calendar: <input type="date" id="dateSelect" value ="2019-07-07">
</div>
</form>
<button onclick="changeStep(2)">Decrease by 2</button>
<button onclick="changeStep(3)">Decrease by 3</button>
<div id="divDisplay"></div>
<script>
var divDisplay = document.getElementById("divDisplay");
var inputDate = document.getElementById("dateSelect");
function changeStep(num){
if(num===2)
inputDate.stepDown(2);
else
inputDate.stepDown(3);
divDisplay.textContent = 'Current date decreased by: '+num;
}
</script>
</body>
</html>Output
This will produce the following output −
Clicking ‘Decrease by 2’ button −

Clicking ‘Decrease by 3’ button −
