Line Swap

Paste it into your composition

Open compositions/components/line-swap.html and copy what is inside into your own composition.A component has no size or duration of its own. It takes both from the composition you paste it into.

Variables

Every one of these has a default, so the piece works untouched. Set the ones you want to change on the element:

Variable	Default	Accepts	What it does
`line_a`	`Everyone promised you AI.`	string	First line; holds center inside the mask, then exits up on the swap beat.
`line_b`	`Almost nobody promised you control.`	string	Replacement line; enters bottom-up on the swap beat and holds.
`swap_at`	`1.5`	number	Second (from mount start) of the beat replacement. Clamped so the swap and underline complete before any exit.
`underline_word`	`control`	string	First case-insensitive substring match in line B gets the accent underline after landing. Empty disables it.
`accent`	`green`	`green`, `blue`, `violet`	Underline color from the contract token map.
`exit`	`none`	`none`, `fade`, `up`	Optional departure. Default none: the landed line holds until the frame cuts.

Set them with data-variable-values on the element that mounts it. These are the defaults, so this behaves exactly like the preview above until you change one:

<div
  data-composition-id="line-swap"
  data-composition-src="compositions/components/line-swap.html"
  data-variable-values='{"line_a":"Everyone promised you AI.","line_b":"Almost nobody promised you control.","swap_at":1.5,"underline_word":"control","accent":"green","exit":"none"}'
></div>

Tagged motion-primitive text-effects swap beat deterministic.

Catalog

Paste it into your composition

Variables

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