The eastasianwidth npm package is a utility for determining the East Asian Width property of Unicode characters, which is useful for handling text display in console applications or any other context where monospaced font rendering is involved. It helps to classify characters based on their expected display width, especially when dealing with East Asian characters.

What are eastasianwidth's main functionalities?

Check character width

This feature allows you to check the East Asian Width property of a character. The output 'F' indicates that the character is a fullwidth character.

"use strict";
const eastasianwidth = require('eastasianwidth');

let char = 'あ';
let width = eastasianwidth.eastAsianWidth(char);
console.log(width); // Output: 'F' (Fullwidth)

Determine if a character is fullwidth

This feature provides a boolean indicating whether a character is fullwidth or not.

"use strict";
const eastasianwidth = require('eastasianwidth');

let char = 'あ';
let isFullwidth = eastasianwidth.isFullwidth(char);
console.log(isFullwidth); // Output: true

Determine if a character is halfwidth

This feature provides a boolean indicating whether a character is halfwidth or not.

"use strict";
const eastasianwidth = require('eastasianwidth');

let char = 'ｱ'; // Halfwidth Katakana Letter A
let isHalfwidth = eastasianwidth.isHalfwidth(char);
console.log(isHalfwidth); // Output: true

Other packages similar to eastasianwidth

Readme

Source

East Asian Width

Get East Asian Width from a character.

'F'(Fullwidth), 'H'(Halfwidth), 'W'(Wide), 'Na'(Narrow), 'A'(Ambiguous) or 'N'(Natural).

Original Code is 東アジアの文字幅 (East Asian Width) の判定 - 中途.

Install

$ npm install eastasianwidth

Usage

var eaw = require('eastasianwidth');
console.log(eaw.eastAsianWidth('￦')) // 'F'
console.log(eaw.eastAsianWidth('｡')) // 'H'
console.log(eaw.eastAsianWidth('뀀')) // 'W'
console.log(eaw.eastAsianWidth('a')) // 'Na'
console.log(eaw.eastAsianWidth('①')) // 'A'
console.log(eaw.eastAsianWidth('ف')) // 'N'

console.log(eaw.characterLength('￦')) // 2
console.log(eaw.characterLength('｡')) // 1
console.log(eaw.characterLength('뀀')) // 2
console.log(eaw.characterLength('a')) // 1
console.log(eaw.characterLength('①')) // 2
console.log(eaw.characterLength('ف')) // 1

console.log(eaw.length('あいうえお')) // 10
console.log(eaw.length('abcdefg')) // 7
console.log(eaw.length('￠￦｡ￜㄅ뀀¢⟭a⊙①بف')) // 19

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Last updated on 21 Apr 2024

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