fix: save serial panel height before expand, restore on collapse#68
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fix: save serial panel height before expand, restore on collapse#68
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Record panel.offsetHeight right before expanding (when it has the correct grid-aligned size). On collapse, restore that exact value. No DOM re-reading after class toggle, no requestAnimationFrame. Signed-off-by: Chao Liu <chao.liu.zevorn@gmail.com>
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Save `panel.offsetHeight` before adding the expanded class (when the height is correct). On collapse, restore that saved value directly. No rAF, no DOM re-reading race.