Uploaded May 2023 | Updated September 2026, 2 weeks ago

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PR: github.com/SerenityOS/serenity/pull/18878

SerenityOS is open source on GitHub: github.com/SerenityOS/serenity

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Discord: discord.gg/serenityos
Merch: store.serenityos.org

SerenityOS is a new operating system that we're building from scratch. serenityos.org
Ladybird is a cross-platform web browser, also part of the SerenityOS project. :^)

00:00 Intro
01:00 Analysis of the Shopify layout problem
03:15 Making a simplified testcase
09:10 Debugging & implementing flex-basis: calc()
26:20 Running into a new problem
32:06 Debugging & fixing calc(50% - 1px)
58:16 Making a test for the calc negation bug
1:04:44 Making git commits
1:16:40 Outro