Add containsWhitespace snippet

snippets/containsWhitespace.md

@@ -0,0 +1,17 @@
+---
+title: containsWhitespace
+tags: string,regexp,beginner
+---
+
+Returns `true` if the given string contains any whitespace characters, `false` otherwise.
+
+Use `RegExp.prototype.test()` with an appropriate regular expression to check if the given string contains any whitespace characters.
+
+```js
+const containsWhitespace = str => /\s/.test(str);
+```
+
+```js
+containsWhitespace('lorem'); // false
+containsWhitespace('lorem ipsum'); // true
+```