From 11e93fa275dc3a6a42668384f501ede030888441 Mon Sep 17 00:00:00 2001
From: Chalarangelo <chalarangelo@gmail.com>
Date: Fri, 22 Jul 2022 11:45:21 +0300
Subject: [PATCH] Add includesCaseInsensitive

---
 snippets/includesCaseInsensitive.md | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 snippets/includesCaseInsensitive.md

diff --git a/snippets/includesCaseInsensitive.md b/snippets/includesCaseInsensitive.md
new file mode 100644
index 000000000..4054ed5fd
--- /dev/null
+++ b/snippets/includesCaseInsensitive.md
@@ -0,0 +1,22 @@
+---
+title: Case-insensitive substring search
+tags: string
+expertise: beginner
+author: chalarangelo
+cover: blog_images/cup-of-orange.jpg
+firstSeen: 2022-07-28T05:00:00-04:00
+---
+
+Checks if a string contains a substring, case-insensitive.
+
+- Use the `RegExp` constructor with the `'i'` flag to create a regular expression, that matches the given `searchString`, ignoring the case.
+- Use `RegExp.prototype.test()` to check if the string contains the substring.
+
+```js
+const includesCaseInsensitive = (str, searchString) =>
+  new RegExp(searchString, 'i').test(str);
+```
+
+```js
+includesCaseInsensitive('Blue Whale', 'blue'); // true
+```