Design CSS transitions with visual easing curve editor and live preview on hover/click states.
Shape a CSS transition by editing its easing curve and comparing the result in live hover and click previews. The builder connects timing choices with the motion they produce, helping you judge acceleration, deceleration, and responsiveness before using the transition in an interface. The common surprise is that a transition does not cause a state change. It only interpolates an eligible CSS property after that property's computed value changes between two states.
The visual curve editor controls how transition progress changes over time. A linear curve advances uniformly, while other curves can begin slowly, accelerate, or settle gradually. For a cubic-bezier timing function, the two control points shape that progression between fixed start and end points. The curve affects pacing, not the transition's total duration.
The live preview exposes the same transition through hover and click interactions so you can compare how it feels when triggered differently. The preview demonstrates movement between configured visual states. In production CSS, those states still need selectors or classes that actually change the relevant property, such as a hover selector or an application-controlled active class.
No. CSS can interpolate only properties and value combinations defined as animatable. Some properties change discretely rather than passing through intermediate values, and incompatible start and end values may not produce the expected motion. Check the property's animation behavior before treating an appealing preview curve as proof that the final declaration will animate.
No. A transition responds to a computed style change but does not store application state. The `:active` pseudo-class generally represents the period while an element is being activated, not a lasting toggle. For a persistent open, selected, or expanded state, your page must supply an appropriate selector, control state, or class change.
The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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