https://github.com/ahdinosaur/typeof-is

utility functions to check primitive types using typeof
https://github.com/ahdinosaur/typeof-is

Last synced: 17 days ago
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utility functions to check primitive types using typeof

• Host: GitHub
• URL: https://github.com/ahdinosaur/typeof-is
• Owner: ahdinosaur
• Created: 2017-03-24T05:41:04.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2017-04-10T14:58:00.000Z (over 7 years ago)
• Last Synced: 2024-10-20T04:40:01.826Z (25 days ago)
• Language: JavaScript
• Homepage:
• Size: 5.86 KB
• Stars: 8
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# typeof-is

utility functions to check primitive types using [`typeof`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof)

```shell

npm install --save typeof-is

```

## background

i prefer using functions over `typeof ===` expressions`, so i often find myself writing these functions inline in my modules.

i wrote this module because the related modules i found seemed to implement the kitchen sink of types, when i usually only need these and i'd rather install a specific module for other types.

## example

```js

const is = require('typeof-is')

is.boolean('true') // false

is.boolean(true) // true

is.function(() => {}) // true

is.number(true) // false

is.number(NaN) // true

is.object({}) // true

is.object(null) // true

is.object(undefined) // false

is.string('') // true

is.string(1) // false

is.symbol(Symbol('a')) // true

is.undefined(null) // false

```

## usage

### `is = require('typeof-is')`

### `is.boolean(value)`

### `is.function(value)`

### `is.number(value)`

### `is.object(value)`

### `is.string(value)`

### `is.symbol(value)`

### `is.undefined(value)`

## license

The Apache License

Copyright © 2017 Michael Williams

Licensed under the Apache License, Version 2.0 (the "License");

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an "AS IS" BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.