Functions in JavaScript can be easily assigned to object properties. You can also invoke it using parentheses ().
Example
You can try to the following code to invoke a JavaScript function as a method −
<html>
<head>
<script>
var employee = {'empname': 'David'}
employee.name = function() {
return this.empname;
}
document.write(employee.name());
</script>
</head>
</html>