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66 lines
1.8 KiB
Markdown
66 lines
1.8 KiB
Markdown
# get-east-asian-width
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> Determine the [East Asian Width](https://unicode.org/reports/tr11/) of a Unicode character
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> East Asian Width categorizes Unicode characters based on their occupied space in East Asian typography, which helps in text layout and alignment, particularly in languages like Japanese, Chinese, and Korean.
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Unlike other similar packages, this package uses the latest Unicode data (which changes each year).
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## Install
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```sh
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npm install get-east-asian-width
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```
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## Usage
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```js
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import {eastAsianWidth, eastAsianWidthType} from 'get-east-asian-width';
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const codePoint = '字'.codePointAt(0);
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console.log(eastAsianWidth(codePoint));
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//=> 2
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console.log(eastAsianWidthType(codePoint));
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//=> 'wide'
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```
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## `eastAsianWidth(codePoint: number, options?: object): 1 | 2`
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Returns the width as a number for the given code point.
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### options
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Type: `object`
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#### ambiguousAsWide
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Type: `boolean`\
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Default: `false`
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Whether to treat an `'ambiguous'` character as wide.
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```js
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import {eastAsianWidth} from 'get-east-asian-width';
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const codePoint = '⛣'.codePointAt(0);
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console.log(eastAsianWidth(codePoint));
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//=> 1
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console.log(eastAsianWidth(codePoint, {ambiguousAsWide: true}));
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//=> 2
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```
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> Ambiguous characters behave like wide or narrow characters depending on the context (language tag, script identification, associated font, source of data, or explicit markup; all can provide the context). **If the context cannot be established reliably, they should be treated as narrow characters by default.**
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> - http://www.unicode.org/reports/tr11/
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## `eastAsianWidthType(codePoint: number): 'fullwidth' | 'halfwidth' | 'wide' | 'narrow' | 'neutral' | 'ambiguous'`
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Returns the type of “East Asian Width” for the given code point.
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## Related
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- [string-width](https://github.com/sindresorhus/string-width) - Get the visual width of a string
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