taap v1.2.0

Type Assertion And Predicate (Taap)

A lightweight zero dependency Typescript type checking library that coerces unknown values. More concise and accurate than typeof checks or similar type checking methods.

🛠 Getting Started

Install dependency

npm i taap

Import and use methods

import { isArray } from 'taap';

const maybeArray: unknown = [];

if (typeof maybeArray === 'array') {
  🚫 typeof [] === 'object'
} else if (isArray(maybeArray)) {
  // `maybeArray` is now of type: `any[]`
  ✅ maybeArray.push(1);
}

Optionally supply a return type

import { isArray } from 'taap';

const maybeArray: unknown = [1, 2, 3];

if (isArray<number>(maybeArray)) {
  // `maybeArray` is now of type: `number[]`
  maybeArray.filter((x) => x > 1);
}

🔭 Available Methods

📚Full documentation

Supports optional generic return type:

• [isArray()](https://schuchard.github.io/taap/globals.html#isarray)
• [isObject()](https://schuchard.github.io/taap/globals.html#isobject)
• [isFunction()](https://schuchard.github.io/taap/globals.html#isfunction)

Fixed return type:

• [isString()](https://schuchard.github.io/taap/globals.html#isstring)
• [isDate()](https://schuchard.github.io/taap/globals.html#isdate)
• [isRegExp()](https://schuchard.github.io/taap/globals.html#isregexp)
• [isBoolean()](https://schuchard.github.io/taap/globals.html#isboolean)
• [isNumber()](https://schuchard.github.io/taap/globals.html#isnumber)
• [isBigInt()](https://schuchard.github.io/taap/globals.html#isbigint)
• [isNull()](https://schuchard.github.io/taap/globals.html#isnull)
• [isUndefined()](https://schuchard.github.io/taap/globals.html#isundefined)

Other:

• [getType()](https://schuchard.github.io/taap/globals.html#gettype)