The original title is 10 words: "Modern Frontend Testing Is Mostly About State, Timing, and Geometry"

Short summary

Modern frontend testing requires observing state, timing, and geometry rather than simple DOM assertions. The article covers challenges with Shadow DOM, portaled modals, hydration mismatches, and CSS scroll-driven effects. It provides practical checklists for verifying interaction boundaries, hydration completion, and viewport relationships in contemporary web applications.

• •Frontend testing must account for state, timing, and geometry simultaneously
• •Shadow DOM, portals, and hydration create deceptive automation states
• •Checklists provided for interaction boundaries, hydration evidence, and viewport geometry

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