From e76291d337900dbfba3b2e04d71c6d718ec7199b Mon Sep 17 00:00:00 2001
From: Sindre Sorhus <sindresorhus@gmail.com>
Date: Wed, 17 Apr 2019 14:46:19 +0700
Subject: [PATCH] Also escape `-`

This enables you to escape a string that is inserted into a regex, for example, into a character class.

Fixes #9
---
 index.d.ts | 8 +++++---
 index.js   | 2 +-
 readme.md  | 6 ++++--
 test.js    | 7 +++++++
 4 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/index.d.ts b/index.d.ts
index a8ecae3..7d34edc 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,16 +1,18 @@
 /**
 Escape RegExp special characters.
 
+You can also use this to escape a string that is inserted into the middle of a regex, for example, into a character class.
+
 @example
 ```
 import escapeStringRegexp = require('escape-string-regexp');
 
-const escapedString = escapeStringRegexp('how much $ for a 🦄?');
-//=> 'how much \\$ for a 🦄\\?'
+const escapedString = escapeStringRegexp('How much $ for a 🦄?');
+//=> 'How much \\$ for a 🦄\\?'
 
 new RegExp(escapedString);
 ```
 */
-declare const escapeStringRegexp: (str: string) => string;
+declare const escapeStringRegexp: (string: string) => string;
 
 export = escapeStringRegexp;
diff --git a/index.js b/index.js
index 08fc586..58217a4 100644
--- a/index.js
+++ b/index.js
@@ -1,6 +1,6 @@
 'use strict';
 
-const matchOperatorsRegex = /[|\\{}()[\]^$+*?.]/g;
+const matchOperatorsRegex = /[|\\{}()[\]^$+*?.-]/g;
 
 module.exports = string => {
 	if (typeof string !== 'string') {
diff --git a/readme.md b/readme.md
index 375585f..157472b 100644
--- a/readme.md
+++ b/readme.md
@@ -15,12 +15,14 @@ $ npm install escape-string-regexp
 ```js
 const escapeStringRegexp = require('escape-string-regexp');
 
-const escapedString = escapeStringRegexp('how much $ for a 🦄?');
-//=> 'how much \\$ for a 🦄\\?'
+const escapedString = escapeStringRegexp('How much $ for a 🦄?');
+//=> 'How much \\$ for a 🦄\\?'
 
 new RegExp(escapedString);
 ```
 
+You can also use this to escape a string that is inserted into the middle of a regex, for example, into a character class.
+
 
 ## License
 
diff --git a/test.js b/test.js
index 2a22573..7fac094 100644
--- a/test.js
+++ b/test.js
@@ -7,3 +7,10 @@ test('main', t => {
 		'\\\\ \\^ \\$ \\* \\+ \\? \\. \\( \\) \\| \\{ \\} \\[ \\]'
 	);
 });
+
+test('escapes `-`', t => {
+	t.is(
+		escapeStringRegexp('foo - bar'),
+		'foo \\- bar'
+	);
+});