Number.NEGATIVE_INFINITY is a special numeric value representing a value less than Number.MIN_VALUE. This value is represented as "-Infinity". It resembles infinity in its mathematical behavior.
Example
You can try to run the following code to learn how to work with Number.NEGATIVE_INFINITY constant −
<html>
<head>
<script>
<!--
function showValue() {
var smallNumber = (-Number.MAX_VALUE) * 2
if (smallNumber == Number.NEGATIVE_INFINITY) {
alert("Value of smallNumber : " + smallNumber );
}
}
//-->
</script>
</head>
<body>
<p>Click the following to see the result:</p>
<form>
<input type="button" value="Click Me" onclick="showValue();" />
</form>
</body>
</html>