The largest possible value a number in JavaScript can have 1.7976931348623157E+308. The Number.MAX_VALUE property belongs to the static Number object. It represents constants for the largest possible positive numbers that JavaScript can work with.
Example
You can try to run the following code to get the maximum value represented by Number object −
Live Demo
<html>
<head>
<script>
<!--
function showValue() {
var val = Number.MAX_VALUE;
document.write ("Value of Number.MAX_VALUE : " + val );
}
//-->
</script>
</head>
<body>
<p>Click the following to see the result:</p>
<form>
<input type="button" value="Click Me" onclick="showValue();" />
</form>
</body>
</html>