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@stdlib/assert-is-function

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@stdlib/assert-is-function

Test if a value is a function.

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What is @stdlib/assert-is-function?

@stdlib/assert-is-function is a utility package that provides functionality to check if a value is a function. This can be useful in various scenarios where type checking is necessary to ensure that a value can be invoked as a function.

What are @stdlib/assert-is-function's main functionalities?

Basic Function Check

This feature allows you to check if a given value is a function. It returns `true` if the value is a function and `false` otherwise.

const isFunction = require('@stdlib/assert-is-function');

console.log(isFunction(function() {})); // true
console.log(isFunction(null)); // false

Arrow Function Check

This feature supports checking if an arrow function is a function. It returns `true` for arrow functions.

const isFunction = require('@stdlib/assert-is-function');

console.log(isFunction(() => {})); // true

Class Method Check

This feature allows you to check if a class method is a function. It returns `true` for class methods.

const isFunction = require('@stdlib/assert-is-function');

class MyClass {
  myMethod() {}
}

console.log(isFunction(MyClass.prototype.myMethod)); // true

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Package last updated on 27 Jul 2024

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