send-mail/node_modules/string-width/readme.md

# string-width [![Build Status](https://travis-ci.org/sindresorhus/string-width.svg?branch=master)](https://travis-ci.org/sindresorhus/string-width)

> Get the visual width of a string - the number of columns required to display it

Some Unicode characters are [fullwidth](https://en.wikipedia.org/wiki/Halfwidth_and_fullwidth_forms) and use double the normal width. [ANSI escape codes](https://en.wikipedia.org/wiki/ANSI_escape_code) are stripped and doesn't affect the width.

Useful to be able to measure the actual width of command-line output.


## Install

```
$ npm install string-width
```


## Usage

```js
const stringWidth = require('string-width');

stringWidth('古');
//=> 2

stringWidth('\u001b[1m古\u001b[22m');
//=> 2

stringWidth('a');
//=> 1

stringWidth('\u001B]8;;https://github.com\u0007Click\u001B]8;;\u0007');
// => 5
```


## Related

- [string-width-cli](https://github.com/sindresorhus/string-width-cli) - CLI for this module
- [string-length](https://github.com/sindresorhus/string-length) - Get the real length of a string
- [widest-line](https://github.com/sindresorhus/widest-line) - Get the visual width of the widest line in a string


## License

MIT © [Sindre Sorhus](https://sindresorhus.com)