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.

📚 Docs
 
⚡ Demo
 
💻 Repo

🛠 Getting Started

#### Install dependency

``bash
npm i taap
`

#### Import and use methods

`ts
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

`ts
import { isArray } from 'taap';

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

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

🔭 Available Methods

$3

Supports optional generic return type:

- isArray()
- isObject()
- isFunction()

Fixed return type:

- isString()
- isDate()
- isRegExp()
- isBoolean()
- isNumber()
- isBigInt()
- isNull()
- isUndefined()

Other:

- getType()`