To get current year in JavaScript, use the getFullYear() method.
Example
You can try to run the following code to print current year −
<!DOCTYPE html>
<html>
<body>
<p>Click below to get the current year:</p>
<button onclick="display()">Display Year</button>
<p id="test"></p>
<script>
function display() {
var date = new Date();
var res = date.getFullYear();
document.getElementById("test").innerHTML = res;
}
</script>
</body>
</html>