![]() The function's codeīecomes easier to understand as it only contains the actual function logic. Correct type of input is assured inside the function.The function cannot silently fail or silently give wrong results due to.Users of the function get useful and consistent error messages when using.Typed-function module to handle the type-checking logic. Logic, or functions facing a public API, it can be very useful to use the The type checking logic can grow quite a bit, and distract from the actualįor functions dealing with a considerable amount of type checking and conversion For functions supporting multiple signatures, Using checks like typeof fn = 'function', date instanceof Date, andĪrray.isArray(arr). Often, JavaScript developers add some basic type checking where it is important, Hard to debug them, as they can be the result of a series of nested functionĬalls manipulating and propagating invalid or incomplete data. These error messages are not very helpful. TypeError: undefined is not a function or TypeError: Cannot call method It may silently fail or return wrong results. The function may throw some error, or worse, When writing a function, the easiest way is to just assume that the function In JavaScript, functions can be called with any number and any type of arguments. Supported environments: node.js, Chrome, Firefox, Safari, Opera, IE11+. Supports union types, any type, and variable arguments.Compose typed functions with multiple signatures.Automatic type conversion of arguments.Runtime type-checking of input arguments. ![]() ![]() Typed-function has the following features: Automatically throw informative errors in case of Move type checking logic and type conversions outside of your function in aįlexible, organized way. ![]()
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