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is that thing a function? Use this module to find out
type checking: is.array, is.arguments, is.function, is.string, is.number, is.date, is.regexp, is.object
TypeScript definitions for is-function
check if an AST node is a function of some sort
Test if a value is a function.
Simple function test
A type checking library where each exported function returns either true or false and does not throw. Also added tests.
Determine whether a given value is a function object.
Test whether a given value is a function.
is-function function part of http://amp.ampersandjs.com.
If isFunction(callbackfn) is false, throw a TypeError exception.
Validatem validator for ensuring that a value is a function
Check if a value's a function.
Custom JavaScript Utilities for MJ Studio
A tiny type checker
Test if a value is an array-like object containing only functions.
Shared utilities for browsers and Node.js
Do checking...
判断当前值是否为函数
一些检查方法