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ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.
ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.
module.exports(value)
⇒ boolean
⏏This method determines whether the passed value is NaN and its type is
Number
. It is a more robust version of the original, global isNaN().
Kind: Exported function
Returns: boolean
- true
if the given value is NaN and its type is Number;
otherwise, false
.
Param | Type | Description |
---|---|---|
value | * | The value to be tested for NaN. |
Example
import numberIsNaN from 'is-nan-x';
console.log(numberIsNaN(NaN)); // true
console.log(numberIsNaN(Number.NaN)); // true
console.log(numberIsNaN(0 / 0)); // true
// e.g. these would have been true with global isNaN()
console.log(numberIsNaN('NaN')); // false
console.log(numberIsNaN(undefined)); // false
console.log(numberIsNaN({}); // false
console.log(numberIsNaN('blabla')); // false
// These all return false
console.log(numberIsNaN(true));
console.log(numberIsNaN(null));
console.log(numberIsNaN(37));
console.log(numberIsNaN('37'));
console.log(numberIsNaN('37.37'));
console.log(numberIsNaN(''));
console.log(numberIsNaN(' '));
FAQs
ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.
We found that is-nan-x demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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