# 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 | |
import stringWidth from 'string-width'; | |
stringWidth('a'); | |
//=> 1 | |
stringWidth('古'); | |
//=> 2 | |
stringWidth('\u001B[1m古\u001B[22m'); | |
//=> 2 | |
``` | |
## API | |
### stringWidth(string, options?) | |
#### string | |
Type: `string` | |
The string to be counted. | |
#### options | |
Type: `object` | |
##### ambiguousIsNarrow | |
Type: `boolean`\ | |
Default: `false` | |
Count [ambiguous width characters](https://www.unicode.org/reports/tr11/#Ambiguous) as having narrow width (count of 1) instead of wide width (count of 2). | |
## 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 | |
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