# opencc-js [](https://www.npmjs.com/package/opencc-js) [](https://github.com/nk2028/opencc-js/actions?query=workflow%3ATest) [](https://www.jsdelivr.com/package/npm/opencc-js)
The JavaScript version of Open Chinese Convert (OpenCC)
[繁體版](README-zh-TW.md) - [简体版](README-zh-CN.md)
## Import
**Import opencc-js in HTML page**
Import in HTML pages:
```html
```
ES6 import
```html
```
**Import opencc-js in Node.js script**
```sh
npm install opencc-js
```
CommonJS
```javascript
const OpenCC = require('opencc-js');
```
ES Modules
```javascript
import * as OpenCC from 'opencc-js';
```
## Usage
**Basic usage**
```javascript
// Convert Traditional Chinese (Hong Kong) to Simplified Chinese (Mainland China)
const converter = OpenCC.Converter({ from: 'hk', to: 'cn' });
console.log(converter('漢語')); // output: 汉语
```
**Custom Converter**
```javascript
const converter = OpenCC.CustomConverter([
['香蕉', 'banana'],
['蘋果', 'apple'],
['梨', 'pear'],
]);
console.log(converter('香蕉 蘋果 梨')); // output: banana apple pear
```
Or using space and vertical bar as delimiter.
```javascript
const converter = OpenCC.CustomConverter('香蕉 banana|蘋果 apple|梨 pear');
console.log(converter('香蕉 蘋果 梨')); // output: banana apple pear
```
**Add words**
* Use low-level function `ConverterFactory` to create converter.
* Get dictionary from the property `Locale`.
```javascript
const customDict = [
['“', '「'],
['”', '」'],
['‘', '『'],
['’', '』'],
];
const converter = OpenCC.ConverterFactory(
OpenCC.Locale.from.cn, // Simplified Chinese (Mainland China) => OpenCC standard
OpenCC.Locale.to.tw.concat([customDict]) // OpenCC standard => Traditional Chinese (Taiwan) with custom words
);
console.log(converter('悟空道：“师父又来了。怎么叫做‘水中捞月’？”'));
// output: 悟空道：「師父又來了。怎麼叫做『水中撈月』？」
```
This will get the same result with an extra convertion.
```javascript
const customDict = [
['“', '「'],
['”', '」'],
['‘', '『'],
['’', '』'],
];
const converter = OpenCC.ConverterFactory(
OpenCC.Locale.from.cn, // Simplified Chinese (Mainland China) => OpenCC standard
OpenCC.Locale.to.tw, // OpenCC standard => Traditional Chinese (Taiwan)
[customDict] // Traditional Chinese (Taiwan) => custom words
);
console.log(converter('悟空道：“师父又来了。怎么叫做‘水中捞月’？”'));
// output: 悟空道：「師父又來了。怎麼叫做『水中撈月』？」
```
**DOM operations**
HTML attribute `lang='*'` defines the targets.
```html
漢語
```
```javascript
// Set Chinese convert from Traditional (Hong Kong) to Simplified (Mainland China)
const converter = OpenCC.Converter({ from: 'hk', to: 'cn' });
// Set the conversion starting point to the root node, i.e. convert the whole page
const rootNode = document.documentElement;
// Convert all elements with attributes lang='zh-HK'. Change attribute value to lang='zh-CN'
const HTMLConvertHandler = OpenCC.HTMLConverter(converter, rootNode, 'zh-HK', 'zh-CN');
HTMLConvertHandler.convert(); // Convert -> 汉语
HTMLConvertHandler.restore(); // Restore -> 漢語
```
## API
* `.Converter({})`: declare the converter's direction via locals.
* default: `{ from: 'tw', to: 'cn' }`
* syntax : `{ from: local1, to: local2 }`
* locals: letter codes defining a writing local tradition, occasionally its idiomatic habits.
* `cn`: Simplified Chinese (Mainland China)
* `tw`: Traditional Chinese (Taiwan)
* `twp`: with phrase conversion (ex: 自行車 -> 腳踏車）
* `hk`: Traditional Chinese (Hong Kong)
* `jp`: Japanese Shinjitai
* `t`: Traditional Chinese (OpenCC standard. Do not use unless you know what you are doing)
* `.CustomConverter([])` : defines custom dictionary.
* default: `[]`
* syntax : `[ ['item1','replacement1'], ['item2','replacement2'], … ]`
* `.HTMLConverter(converter, rootNode, langAttrInitial, langAttrNew )` : uses previously defined converter() to converts all HTML elements text content from a starting root node and down, into the target local. Also converts all attributes `lang` from existing `langAttrInitial` to `langAttrNew` values.
* `lang` attributes : html attribute defines the languages of the text content to the browser, at start (`langAttrInitial`) and after conversion (`langAttrNew`).
* syntax convention: [IETF languages codes](https://www.w3.org/International/articles/bcp47/#macro), mainly `zh-TW`, `zh-HK`, `zh-CN`, `zh-SG`,…
* `ignore-opencc` : html class signaling an element and its sub-nodes will not be converted.
## Bundle optimization
* Tree Shaking (ES Modules Only) may result less size of bundle file.
* Using `ConverterFactory` instead of `Converter`.
```javascript
import * as OpenCC from 'opencc-js/core'; // primary code
import * as Locale from 'opencc-js/preset'; // dictionary
const converter = OpenCC.ConverterFactory(Locale.from.hk, Locale.to.cn);
console.log(converter('漢語'));
```