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Sync editor and preview scrolling, with optional snap on click - #469
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Damox101za wants to merge 1 commit into
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Scrolling the editor or the preview now moves the other to the same relative position, and the preview keeps its place when it re-renders after an edit. Clicking a line in the editor glides the preview to the matching block and briefly highlights it; this can be turned off from View > Snap Preview on Click and the choice is remembered. The preview iframe stays sandboxed: the two sides talk through postMessage via a small injected script, and the preview only accepts messages from the editor window. The logic lives in lib/preview-sync.mjs with Node tests. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Scrolling the editor or the preview now moves the other to the same relative position, and the preview keeps its place when it re-renders after an edit. Clicking a line in the editor glides the preview to the matching block and briefly highlights it; this can be turned off from View > Snap Preview on Click and the choice is remembered.
The preview iframe stays sandboxed: the two sides talk through postMessage via a small injected script, and the preview only accepts messages from the editor window. The logic lives in lib/preview-sync.mjs with Node tests.