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assert-is-callable-x

3.1.2 • Public • Published

Travis status Dependency status devDependency status npm version jsDelivr hits bettercodehub score Coverage Status

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

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 '#<Object> is not callable'.
assertIsCallable(mySymbol); // TypeError 'Symbol(mySymbol) is not callable'.
assertIsCallable(symObj); // TypeError '#<Object> is not callable'.
console.log(assertIsCallable(fn)); // Returns fn.

Install

npm i assert-is-callable-x

DownloadsWeekly Downloads

2

Version

3.1.2

License

MIT

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120 kB

Total Files

11

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