packages/escape-regex-str/README.md
# @jsbits/escape-regex-str
_Part of the [JSBits][jsbits-url] suite._
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Escapes special characters in a string, for matching substrings with a RegExp instance.
## Install
For NodeJS and JS bundlers:
```bash
npm i @jsbits/escape-regex-str
# or
yarn add @jsbits/escape-regex-str
```
or load `escapeRegexStr` in the browser:
```html
<script src="https://unpkg.com/@jsbits/escape-regex-str/index.b.min.js"></script>
```
### Targets
- ES5 compatible browser
- NodeJS v4.2 or later
## `escapeRegexStr(str)` ⇒ `string`
Escapes special characters in a given string in preparation to be used as
argument of the JS `RegExp` constructor, useful when you want to match the
given string as a literal substring.
| Param | Type | Description |
| --- | --- | --- |
| str | `string` | A string. |
**Returns**: `string` - The escaped string.
Since 1.0.0<br>
Group: dev<br>
Author/Maintainer: aMarCruz<br>
### Example
```ts
import escapeRegexStr from '@jsbits/escape-regex-str'
const sourceStr = 'Unicorn (white): $'
// without escapeRegexStr, the test fails.
const regex1 = new RegExp(sourceStr)
console.log(regex1.test('Unicorn (white): $1.00')) // ⇒ false
// with escapeRegexStr, it succeeds.
const regex2 = new RegExp(escapeRegexStr(sourceStr))
console.log(regex2.test('Unicorn (white): $1.00')) // ⇒ true
```
## Imports
All the [JSBits][jsbits-url] functions works in _strict mode_ and are compatible with:
- ES5 browsers, through the [jQuery](https://jquery.com/) `$.jsbits` object or the global `jsbits`.
- ESM Bundlers, like [webpack](http://webpack.github.io/) and [Rollup](https://rollupjs.org/).
- [ES modules](http://2ality.com/2014/09/es6-modules-final.html) for modern browsers or NodeJS with the `--experimental-modules` flag.
- [CommonJS](https://nodejs.org/docs/latest/api/modules.html#modules_modules) modules of NodeJS, jspm, and others.
- [Babel](https://babeljs.io/) and [TypeScript](www.typescriptlang.org/), through ES Module Interop.
Please see the [Distribution Formats][jsbits-formats] in the JSBits README to know about all the variants.
## Support my Work
I'm a full-stack developer with more than 20 year of experience and I try to share most of my work for free and help others, but this takes a significant amount of time and effort so, if you like my work, please consider...
[<img src="https://amarcruz.github.io/images/kofi_blue.png" height="36" title="Support Me on Ko-fi" />][kofi-url]
Of course, feedback, PRs, and stars are also welcome 🙃
Thanks for your support!
## License
The [MIT](LICENSE) License.
© 2018-2019 Alberto Martínez – Readme powered by [jscc](https://github.com/aMarCruz/jscc) and [jsdoc-to-markdown](https://github.com/75lb/jsdoc-to-markdown)
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