Rename js snippets

snippets/js/s/add-class-to-html-element.md

@@ -0,0 +1,22 @@
+---
+title: Add class to HTML element
+type: snippet
+language: javascript
+tags: [browser]
+author: chalarangelo
+cover: shiny-mountains
+dateModified: 2020-12-30T19:21:15+02:00
+---
+
+Adds a class to an HTML element.
+
+- Use `Element.classList` and `DOMTokenList.add()` to add the specified class to the element.
+
+```js
+const addClass = (el, className) => el.classList.add(className);
+```
+
+```js
+addClass(document.querySelector('p'), 'special');
+// The paragraph will now have the 'special' class
+```