Added getStyle/setStyle snippets

snippets/setStyle.md

@@ -0,0 +1,13 @@
+### setStyle
+
+Sets the value of a CSS rule for the specified element.
+
+Use `element.style` to set the value of the CSS rule for the specified element to `value`.
+
+```js
+const setStyle = (el, ruleName, value) => el.style[ruleName] = value;
+```
+
+```js
+setStyle(document.querySelector('p'), 'font-size', '20px') // The first <p> element on the page will have a font-size of 20px
+```