JavaScript closest
When it comes to finding relationships between elements, we traditionally think of a top-down approach. We can thank CSS and querySelector/querySelectorAll for that relationship in selectors. What if we want to find an element's parent based on selector?
To look up the element tree and find a parent by selector, you can use HTMLElement's closest method:
// Our sample element is an "a" tag that matches ul > li > a
const link = document.querySelector('li a');
const list = a.closest('ul');
closest looks up the ancestor chain to find a matching parent element -- the opposite of traditional CSS selectors. You can provide closest a simple or complex selector to look upward for!
![Animating CSS3 Transforms with MooTools Fx]()
![6 Things You Didn’t Know About Firefox OS]()
Firefox OS is all over the tech news and for good reason: Mozilla's finally given web developers the platform that they need to create apps the way they've been creating them for years -- with CSS, HTML, and JavaScript. Firefox OS has been rapidly improving...
![Generate Dojo GFX Drawings from SVG Files]()
One of the most awesome parts of the Dojo / Dijit / DojoX family is the amazing GFX library. GFX lives within the dojox.gfx namespace and provides the foundation of Dojo's charting, drawing, and sketch libraries. GFX allows you to create vector graphics (SVG, VML...
![Create Spinning Rays with CSS3 Animations & JavaScript]()
Thomas Fuchs, creator of script2 (scriptaculous' second iteration) and Zepto.js (mobile JavaScript framework), creates outstanding animated elements with JavaScript. He's a legend in his own right, and for good reason: his work has helped to inspire developers everywhere to drop Flash and opt...