East Asian Width

A javascript implementation of full-width and half-width unicode character detector.

Installation

npm

npm install east-asian-width

bower

bower install east-asian-width

Usage

var should = require('chai').should(),
    east_asian_width = require('east-asian-width'),
    char_width = east_asian_width.char_width,
    str_width = east_asian_width.str_width,
    cjk_char_width = east_asian_width.cjk_char_width,
    cjk_str_width = east_asian_width.cjk_str_width;

char_width('杜'.codePointAt(0)).should.equal(2);
str_width('Coding is my life').should.equal(17);
cjk_char_width('Æ'.codePointAt(0)).should.equal(2);
cjk_str_width('��').should.equal(6);

Tests

npm test

Debug

Install node-inspector.

npm install -g node-inspector

then run test in debug mode, listening on port 5858 and pause on first line.

npm run-script test_debug

then start node-inspector on another console.

node-inspector

then visit http://127.0.0.1:8080/debug?port=5858 on browser.

Release History

• 0.1.0 Initial release
• 0.1.1 Integrate with Travis CI, Coveralls

Author

####Vangie Du The future you must thank to the present hard working one.

Links

1. This is an implementation of wcwidth() and wcswidth() (defined in IEEE Std 1002.1-2001) for Unicode.
2. Unicode Standard Annex #11 EAST ASIAN WIDTH
3. determine whether a unicode character is fullwidth or halfwidth in C++