How to Debug Shopify Theme App Extension Conflicts (opens in a new tab)

From the article

Our first two articles established the damage: CSS specificity conflicts caused regressions in 61% of the 53 stores we scanned, and z-index arms races produced values above 90,000 in five of them. But we glossed over the hardest part for developers who are actually in the fight: how do you systematically find and fix these conflicts when you didn't write the theme and you don't know which of your three apps is causing the problem? This article is the workflow. It's the checklist we use when…

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