Unlock the Power of Safe Integers in JavaScript
The Definition of Safe Integers
A safe integer is an integer that can be precisely represented as an IEEE-754 double precision number. This means that safe integers fall within a specific range, from 2^53 - 1 to -(2^53 - 1). Any integer within this range can be safely used in your JavaScript code without worrying about precision errors.
Introducing the isSafeInteger() Method
The isSafeInteger() method is a handy tool that helps you determine whether a given value is a safe integer or not. This method is called using the Number class name and takes in a single parameter: testValue.
How the isSafeInteger() Method Works
The isSafeInteger() method returns a boolean value indicating whether the testValue is a safe integer or not. If the value is within the safe integer range, the method returns true; otherwise, it returns false.
Putting it into Practice
console.log(Number.isSafeInteger(9007199254740991)); // true
console.log(Number.isSafeInteger(9007199254740992)); // falseIn this example, the first value is a safe integer, while the second value exceeds the safe integer range.
Recommended Readings
To dive deeper into the world of JavaScript numbers, be sure to check out:
These resources will provide you with a more comprehensive understanding of safe integers and how to work with them effectively in your JavaScript code.