Why is my slide-up animation using CSS3 @keyframes not working?
CSS3 Transition - Fade Out Effect
Using CSS3, you can easily implement fade-out effects to enhance the user experience. However, if you encounter issues with slide animations not working, let's explore the reasons why.
Understanding the Issue
You're attempting to create a slide-up animation using @keyframes. However, the animation is not occurring. To debug this, we'll delve into the code you provided.
<code class="css">.dummy-wrap {
animation: slideup 2s;
}</code>
This code indicates that the .dummy-wrap class should perform the slideup animation for 2 seconds. The @keyframes block defines the animation's movements:
<code class="css">@keyframes slideup {
0% {top: 0px;}
75% {top: 0px;}
100% {top: -20px;}
}</code>
Troubleshooting the Slide Animation
Inspecting the keyframes, we notice that the element's position only changes in the last 25% of the animation. Since the element starts at top: 0px; and ends at top: -20px;, it will essentially move instantly to top: -20px;, resulting in a sudden "slide-up" effect.
Alternative Solution for Fade-Out
Instead of using translate, you can use opacity to achieve a fade-out effect. Here's how you can implement it:
<code class="css">.hidden {
opacity: 0;
transition: opacity 2s;
}</code>
This technique gradually reduces the element's opacity, creating a visible fade-out effect over the course of 2 seconds.
Additional Details
In the initial version of your code, the sudden "slide-up" effect was due to the fact that the element's position was only modified in the last 25% of the animation. By switching to opacity and transitioning it over the entire duration, we achieve a smooth fade-out effect.
The above is the detailed content of Why is my slide-up animation using CSS3 @keyframes not working?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
ArtGPT
AI image generator for creative art from text prompts.
Stock Market GPT
AI powered investment research for smarter decisions
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
How to use pseudo-classes in CSS
Sep 07, 2025 am 06:59 AM
Pseudo-classesinCSSarekeywordsthatstyleelementsbasedonstate,position,orattributes,improvinginteractivityandreducingtheneedforextraHTMLclasses;theyareappliedusingacolon(:)syntaxlikeselector:pseudo-class,enablingdynamiceffectssuchasa:hover{color:red;}f
How to create a dropdown menu with pure CSS
Sep 20, 2025 am 02:19 AM
Use HTML and CSS to create drop-down menus without JavaScript. 2. Trigger the submenu display through the :hover pseudo-class. 3. Use nested lists to build a structure, and set the hidden and suspended display effects in CSS. 4. Transition animation can be added to improve the visual experience.
How to use the pointer-events property in CSS
Sep 17, 2025 am 07:30 AM
Thepointer-eventspropertyinCSScontrolswhetheranelementcanbethetargetofpointerevents.1.Usepointer-events:nonetodisableinteractionslikeclicksorhoverswhilekeepingtheelementvisuallyvisible.2.Applyittooverlaystoallowclick-throughbehaviortounderlyingelemen
How to apply a filter to an image with CSS
Sep 21, 2025 am 02:27 AM
TheCSSfilterpropertyallowseasyimagestylingwitheffectslikeblur,brightness,andgrayscale.Usefilter:filter-function(value)onimagesorbackgroundimages.Commonfunctionsincludeblur(px),brightness(%),contrast(%),grayscale(%),saturate(%),andhue-rotate(deg).Mult
How to add a box shadow effect with CSS
Sep 20, 2025 am 12:23 AM
Usethebox-shadowpropertytoadddropshadows.Definehorizontalandverticaloffsets,blur,spread,color,andoptionalinsetforinnershadows.Multipleshadowsarecomma-separated.Example:box-shadow:5px10px8pxrgba(0,0,0,0.3);createsasoftblackshadow.
How to prevent images from stretching or shrinking with CSS
Sep 21, 2025 am 12:04 AM
Useobject-fitormax-widthwithheight:autotopreventimagedistortion;object-fitcontrolshowimagesfillcontainerswhilepreservingaspectratios,andmax-width:100%;height:autoensuresresponsivescalingwithoutstretching.
How to add a gradient background in CSS
Sep 16, 2025 am 05:30 AM
To add a CSS gradient background, use the background or background-image attributes to cooperate with functions such as linear-gradient(), radial-gradient(); first select the gradient type, set the direction and color, and you can finely control it through color docking points, shape, size and other parameters, such as linear-gradient(toright,#ff7e5f,#feb47b) to create a linear gradient from left to right, radial-gradient(circle,#ff9a9e,#fecfef) to create a circular radial gradient, and you can also use repeating-linear-gr
How to create a staggered animation effect on a list with CSS
Sep 18, 2025 am 12:15 AM
Using CSS to create interleaved animation effects requires setting the same animation for the list items but staggering the start time. First, build an unordered list HTML structure, then define the @keyframes animation that fades into the slide, and then set incremental animation-delay for each list item through the :nth-child selector or CSS custom attribute to achieve the stagger effect. Finally, JavaScript can be optionally used to control triggering when entering the viewport. This method achieves natural and smooth cascading animations by coordinating element timing.
