is-alphabetical

Check if a character is alphabetical.

Contents

• What is this?
• When should I use this?
• Install
• Use
• API
  • isAlphabetical(value)
• Types
• Compatibility
• Security
• Related
• Contribute
• License

What is this?

This is a function that checks if a given character is ASCII alphabetical: matching [a-z], case insensitive.

When should I use this?

Not often, as it’s relatively simple to do yourself. This package exists because it’s needed in several related packages, at which point it becomes useful to defer to one shared function.

Install

This package is ESM only. In Node.js (version 14.14+, 16.0+), install with npm:

npm install is-alphabetical

In Deno with esm.sh:

import {isAlphabetical} from 'https://esm.sh/is-alphabetical@2'

In browsers with esm.sh:

<script type="module">
  import {isAlphabetical} from 'https://esm.sh/is-alphabetical@2?bundle'
</script>

Use

import {isAlphabetical} from 'is-alphabetical'

isAlphabetical('a') // => true
isAlphabetical('B') // => true
isAlphabetical('0') // => false
isAlphabetical('💩') // => false

API

This package exports the following identifier: isAlphabetical. There is no default export.

isAlphabetical(value)

Check if the given code point (number), or the code point at the first index (string), is alphabetical.

Types

This package is fully typed with TypeScript. It exports no additional types.

Compatibility

This package is at least compatible with all maintained versions of Node.js. As of now, that is Node.js 14.14+ and 16.0+. It also works in Deno and modern browsers.

Security

This package is safe.

Related

• wooorm/is-decimal
• wooorm/is-hexadecimal
• wooorm/is-alphanumerical
• wooorm/is-whitespace-character
• wooorm/is-word-character

Contribute

Yes please! See How to Contribute to Open Source.

License

MIT © Titus Wormer