Troubleshooting

Nothing moves

1. Empty target — No slot content, or v-if hid nodes on first compose.
2. Wrong layer — Default targets are slot children; use is + tween-target="self" for the scope root.
3. Selector without is — String selectors need is.

Wrong element animated

1. Nested Tween without seamless — Set seamless on inner tweens for chains.
2. SplitText outside Tween slot — Wrap with a parent Tween (SplitText).

progress does not scrub

Use v-model:progress with a defined number. Scrubbing pauses the timeline automatically; avoid changing trigger while scrubbing if both are bound.

trigger does unexpected action

Bind trigger-action in the same template as trigger, e.g. :trigger-action="trigger ? 'play' : 'reverse'". See Controls and Controls — Trigger.

Tween kind / prop mismatch

One kind per Tween: to, from, from + to, or effect. Use :key when switching kind at runtime — see Tween — Tween kinds.

Nesting / parent not found

• :parent="null" (boolean binding) opts out of inject — not the string "null".
• :parent="parent" from a nested Timeline slot — see Nesting — Manual parent assignment.
• :parent="timelineRef" — only when the nestable cannot live inside the target Timeline tree; use useTemplateRef<DejaVueAnimationExposed>. See Component instance types.
• inject(dejaVueParentInstance) yields DejaVueAnimationInstance (raw refs).
• parent is resolved at component setup. If an explicit parent is not ready when the child mounts, delay the child (v-if) or ensure the parent is mounted first.
• Reading parent.direction in custom code when parent is DejaVueAnimationParent: use toValue(parent?.direction) from Vue.

Conditional tweens land in the wrong order

Set explicit position — see Dynamic children.

Child removed with v-if but timeline still references it briefly

While the parent Timeline is playing, useAnimationNesting defers remove until the parent finishes its current cycle (same as Types API — remove). Pause the parent or wait for complete / reverseComplete if you need the child off the GSAP timeline immediately. Unmounting the child component forces removal.

Marker cross or crossed out of sync

@cross passes direction at the crossing (1 forward, -1 reverse). Slot crossed follows playhead position relative to the marker. During scroll-driven playback, see ScrollTrigger if crossed or progress lag after a toggleActions reset.

SplitText flicker

Avoid recreating SplitText option objects every render.

ScrollTrigger

See Animation targets — ScrollTrigger for setup, defaults, fromTo, and smooth-scroll libraries.

Quick checks:

1. Put scrollTrigger in tween from / to vars or timeline options.
2. Import Tween, Timeline, or Animation from deja-vue once so the plugin registers — Getting started — GSAP plugins.
3. If you omit scrollTrigger.trigger, set is on Tween / Timeline so Déjà Vue can bind to the component root — or pass an explicit trigger. See Default scrollTrigger.trigger.

Still stuck

Open an issue with a minimal SFC and package versions.