For example, the following code adds the info class to the class list of the div element with the id content: The following example adds multiple CSS classes to the class list of an element: To remove a CSS class from the class list of an element, you use the remove() method: Like the add() method, you can remove multiple classes once: To replace an existing CSS class with a new one, you use the replace() method: To check if the element has a specified class, you use the contains() method: The contains() method returns true if the classList contains a specified class; otherwise false.
Some of the most useful yet little-known JavaScript tricks for manipulating CSS transitions and animations are the DOM events they fire. class values from an element which may result in certain style rules
Killer hosting by (mt) mediatemple, Chrome Dev Tools Tricks for Front End Developers. This new API is affectionately known as classList, and it provides a handful of So, there you have it - two perfectly fine JavaScript-based approaches
We can use JavaScript to
CSS-Tricks is hosted by Flywheel, the best WordPress hosting in the It does handle the basic easing functions well though.
property transforms into borderRadius, To specify a CSS property in JavaScript that contains a dash, scenarios, the CSS model involving style rules or inline styles won't
already exists on the element, our code will still run, but the duplicate class value will not get added. the ability to modify your CSS, I would prefer you go style elements by
I didn’t actually know about everything in this article so it was pretty eye opening. That's a good thing!
This requires a bit of trickery! time the toggle method is called. This resets the counter to 0 at the exact moment the animation restarts, negating and under/over-lap that may have occured.
Next, we need to change the % into a degree of the circle. The animation-play-state property of CSS is incredibly helpful when you simply need to pause an animation and potentially continue it later.
In CSS it is a
In JavaScript, CSS transitions are generally easier to work with than CSS animations. For example, this is what setting the
much of what i seen here is easier to do with just the css3 . simply remove the dash. The same concept was used in this example for a StackOverflow question.
And here is another one determining which animation (name) the event is firing for. As a motion graphics animator and front end web developer these articles always make me cringe though. Sarah comprehensively covers the possibilty of animation, the tools, and does it all in a very practical way. In the case of our circular animation demo, we need two variables: one to track how many degrees the circle had traveled since its most recent start location, and another to track how many degrees it had traveled since the original start location. Thanks for a great resource; I was about to conduct some hard-core studying of CSS-JS animations, & you’ve saved alot of research time for me!