FEATURE: Improved diff streaming for AI composer helper #1332
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xfalcox
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May 12, 2025
xfalcox
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May 12, 2025
SamSaffron
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May 21, 2025
Previously we attempted to add a diff streaming animation to the AI composer helper: #1332, but it resulted in issues despite attempted fixes (#1338) so we temporarily suppressed the diff animation (#1341). This update makes a second attempt at implementing the diff streaming animation. Instead of creating a custom diff algorithm, we make use of a third-party library [`jsDiff`](https://github.com/kpdecker/jsdiff) (which we added to core here: discourse/discourse#32833). While streaming, the diff animation often struggles with markdown links and images, so we make use of `markdown-it` parser to detect those cases and prevent breaking the animation. --------- Co-authored-by: Sam Saffron <sam.saffron@gmail.com>
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🔍 Overview
This update improves the animation for streaming a diff of changes when AI helper proofread is triggered. It shows the original text with diff changes live instead of after the fact.
📹 Screen Recording
← Before
Screen.Recording.2025-05-09.at.14.06.40.mov
→ After
Diff types:
dimmed.mov
Regular types:
non-diff-after.mov