Character encoding detection tool for NodeJS
Go to file
dependabot[bot] b52d8d13c9
Bump normalize-url from 5.3.0 to 5.3.1
Bumps [normalize-url](https://github.com/sindresorhus/normalize-url) from 5.3.0 to 5.3.1.
- [Release notes](https://github.com/sindresorhus/normalize-url/releases)
- [Commits](https://github.com/sindresorhus/normalize-url/commits)

---
updated-dependencies:
- dependency-name: normalize-url
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
2021-06-09 00:14:43 +00:00
.github/workflows chore: reconfigure ci/cd 2021-04-28 12:25:19 +10:00
src feat: Make it work in browser 2020-09-25 21:33:45 +10:00
.eslintignore chore: Switch to eslint 2020-09-23 12:16:38 +10:00
.eslintrc.json chore: fix linting errors 2020-09-23 13:09:36 +10:00
.gitignore feat: Make it work in browser 2020-09-25 21:33:45 +10:00
.npmignore Add `yarn.lock` to `.npmignore`. 2018-01-25 19:49:49 -07:00
.prettierrc.json BREAKING CHANGE: Repo overhaul 2020-03-31 20:53:25 +11:00
LICENSE BREAKING CHANGE: Repo overhaul 2020-03-31 20:53:25 +11:00
README.md chore: reconfigure ci/cd 2021-04-28 12:25:19 +10:00
jest.config.js BREAKING CHANGE: Repo overhaul 2020-03-31 20:53:25 +11:00
package-lock.json Bump normalize-url from 5.3.0 to 5.3.1 2021-06-09 00:14:43 +00:00
package.json feat: Make it work in browser 2020-09-25 21:33:45 +10:00
renovate.json BREAKING CHANGE: Repo overhaul 2020-03-31 20:53:25 +11:00
tsconfig.json chore: up misc dev deps 2020-09-23 12:01:39 +10:00

README.md

chardet

Chardet is a character detection module written in pure Javascript (Typescript). Module uses occurrence analysis to determine the most probable encoding.

  • Packed size is only 22 KB
  • Works in all environments: Node / Browser / Native
  • Works on all platforms: Linux / Mac / Windows
  • No dependencies
  • No native code / bindings
  • 100% written in Typescript
  • Extensive code coverage

Installation

npm i chardet

Usage

To return the encoding with the highest confidence:

const chardet = require('chardet');

chardet.detect(Buffer.from('hello there!'));
// or
chardet.detectFile('/path/to/file').then(encoding => console.log(encoding));
// or
chardet.detectFileSync('/path/to/file');

To return the full list of possible encodings use analyse method.

const chardet = require('chardet');
chardet.analyse(Buffer.from('hello there!'));

Returned value is an array of objects sorted by confidence value in decending order

[
  { confidence: 90, name: 'UTF-8' },
  { confidence: 20, name: 'windows-1252', lang: 'fr' }
];

Working with large data sets

Sometimes, when data set is huge and you want to optimize performace (in tradeoff of less accuracy), you can sample only first N bytes of the buffer:

chardet
  .detectFile('/path/to/file', { sampleSize: 32 })
  .then(encoding => console.log(encoding));

Supported Encodings:

  • UTF-8
  • UTF-16 LE
  • UTF-16 BE
  • UTF-32 LE
  • UTF-32 BE
  • ISO-2022-JP
  • ISO-2022-KR
  • ISO-2022-CN
  • Shift_JIS
  • Big5
  • EUC-JP
  • EUC-KR
  • GB18030
  • ISO-8859-1
  • ISO-8859-2
  • ISO-8859-5
  • ISO-8859-6
  • ISO-8859-7
  • ISO-8859-8
  • ISO-8859-9
  • windows-1250
  • windows-1251
  • windows-1252
  • windows-1253
  • windows-1254
  • windows-1255
  • windows-1256
  • KOI8-R

Currently only these encodings are supported.

Typescript?

Yes. Type definitions are included.

References