https://github.com/xotic750/assert-is-callable-x
If IsCallable(callbackfn) is false, throw a TypeError exception.
https://github.com/xotic750/assert-is-callable-x
browser ecmascript nodejs
Last synced: about 1 month ago
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If IsCallable(callbackfn) is false, throw a TypeError exception.
- Host: GitHub
- URL: https://github.com/xotic750/assert-is-callable-x
- Owner: Xotic750
- License: mit
- Created: 2015-11-26T19:25:25.000Z (over 10 years ago)
- Default Branch: master
- Last Pushed: 2023-01-04T21:54:48.000Z (over 3 years ago)
- Last Synced: 2025-02-20T04:36:27.522Z (over 1 year ago)
- Topics: browser, ecmascript, nodejs
- Language: JavaScript
- Size: 1.92 MB
- Stars: 1
- Watchers: 2
- Forks: 0
- Open Issues: 20
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
## assert-is-callable-x
If IsCallable(callbackfn) is false, throw a TypeError exception.
### `module.exports(value)` ⇒ \* ⏏
Tests `callback` to see if it is callable, throws a `TypeError` if it is
not. Otherwise returns the `callback`.
**Kind**: Exported function
**Returns**: \* - Returns `callback` if it is callable.
**Throws**:
- TypeError Throws if `callback` is not a callable.
| Param | Type | Description |
| --------- | ------------------- | ----------------------------- |
| value | \* | The argument to be tested. |
| [message] | string | Optional alternative message. |
**Example**
```js
import assertIsCallable from 'assert-is-callable-x';
const primitive = true;
const mySymbol = Symbol('mySymbol');
const symObj = Object(mySymbol);
const object = {};
const fn = function fn() {};
assertIsCallable(primitive); // TypeError 'true is not callable'.
assertIsCallable(object); // TypeError '# is not callable'.
assertIsCallable(mySymbol); // TypeError 'Symbol(mySymbol) is not callable'.
assertIsCallable(symObj); // TypeError '# is not callable'.
console.log(assertIsCallable(fn)); // Returns fn.
```