1
CSS Transitions
Captures the computed state of CSS transitions, detecting changes in duration, timing function, and target properties.
15 test cases
Animations
Animations and transitions bring interfaces to life, but they also introduce visual instability. Delta-QA freezes transitions at their computed state and captures transform values to detect any changes in motion behavior.
What we detect
2
Keyframe Animations
Freezes @keyframes at their current frame to compare animation states across page versions.
3
Hover & Interactive States
Captures :hover, :active, and other interactive state visual snapshots for comparison.
4
Transform & Origin
Detects changes in translate, rotate, scale, skew values and transform-origin modifications.
Live example
See exactly what Delta-QA detects. Compare the two versions side by side.
Before
After
Real-world scenarios
🎯
The transition that becomes instant
A developer refactors styles and accidentally removes the 300ms transition on the dropdown menu. Without the transition, the menu pushes content below it all at once instead of sliding smoothly — the page visually "jumps." Visible consequence: elements below the menu end up shifted compared to the reference version, because the browser no longer has time to recalculate the layout gradually. It's a CSS refactor, nobody thought to retest visual interactions. Delta-QA compares screenshots of the open menu and detects the content shifts below it — the different layout stands out in the diff.
⚠️
The loader that changes style
A developer copy-pastes loader styles from another project to "harmonize" components. The new loader looks visually different: larger, with an accent color that doesn't match the brand, and a different indicator style (dotted instead of solid). It spins, so functionally it works — the team figured "it's a loader, it's fine." Delta-QA compares screenshots and highlights the differences in size, color, and shape of the loader — the component that no longer matches the reference stands out in the diff.
💡
The hover that stops working
A developer places a transparent element over buttons to handle analytics tracking. Consequence: hover no longer triggers — the mouse hovers the invisible element, not the button. Visually, buttons stay in their default color on hover, the site feels "dead." The change was about tracking, not buttons — nobody thought to check hover visual feedback. Delta-QA captures button hover states and compares screenshots: the button that no longer changes color stands out in the diff.
Ready to catch every visual regression?
Download Delta-QA and start detecting CSS changes in your web pages — no code required.