The original title is: "The Frontend Testing Problems That Happy-Path E2E Tests Usually Miss"

Short summary

The article outlines frontend testing gaps that happy-path E2E suites typically miss, including container query responsiveness, design token drift, and modern browser APIs like Popover and Anchor Positioning. It argues that visual regression and state-transition testing are needed beyond simple screenshot comparisons. Multiple inline product references suggest a content marketing motivation.

• •Container queries require testing component state transitions, not just viewport widths
• •Design token changes can break more screens than feature PRs without crashing anything
• •Visual regression needs a deliberate comparison strategy, not just more screenshots

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