1.0.0 • Published 8 years ago
is-nullish v1.0.0
node-is-nullish
Example
var isNull = require("is-nullish");
isNull("");
//true
isNull(0);
//falseInstallation
npm i is-nullish
Usage
Differences between falsy, is-nullish, and is-empty:
| value | typeof value | Boolean(value) | isNull(value) | isEmpty(value) |
|---|---|---|---|---|
| not defined | "undefined" | false | true | true |
| undefined | "undefined" | false | true | true |
| null | "object" | false | true | true |
| "" | "string" | false | true | true |
| NaN | "number" | false | true | false |
| 0 | "number" | false | false | true |
| false | "boolean" | false | false | false |
| {} | "object" | true | true* | true |
| [] | "object" | true | true* | true |
| function () {} | "function" | true | true* | true |
*Objects and functions are nullish unless they have non-nullish enumerable properties.
API Reference
isNull(value) ⇒ boolean ⏏
Kind: Exported function
Params
- value *
Example
var f = function (x) { return x; };
isNull(f);
//true
f.objective = "objectify";
isNull(f);
//falseLicense
MPL 2.0
1.0.0
8 years ago