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>