Prepare repository for merge

javascript/snippets/is-alpha.md

@@ -0,0 +1,21 @@
+---
+title: String is alpha
+type: snippet
+tags: [string,regexp]
+cover: coffee-phone-tray-3
+dateModified: 2020-12-31T14:01:42+02:00
+---
+
+Checks if a string contains only alpha characters.
+
+- Use `RegExp.prototype.test()` to check if the given string matches against the alphabetic regexp pattern.
+
+```js
+const isAlpha = str => /^[a-zA-Z]*$/.test(str);
+```
+
+```js
+isAlpha('sampleInput'); // true
+isAlpha('this Will fail'); // false
+isAlpha('123'); // false
+```