Frontend Debugging Plan: Incorrect DOM Attributes in an Unfamiliar Framework
Context
You join a team using an unfamiliar frontend framework. In the browser DevTools, rendered DOM elements show incorrect attributes (e.g., className rendered instead of class, mis-cased data-*/aria-* attributes, or boolean props serialized as strings). You need to quickly isolate the root cause, implement a fix, and prevent regressions.
Task
Outline a step-by-step debugging plan that covers:
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Creating a minimal reproduction.
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Inspecting template-to-DOM compilation or JSX/TSX transforms.
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Checking SSR vs client hydration mismatches.
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Verifying component prop passthrough and attribute reflection (especially for custom elements).
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Auditing build tooling and plugins.
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Confirming reserved or framework-specific props behavior.
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Isolating the root cause, implementing a fix, and adding safeguards (lint rules, type checks, tests) to prevent regressions.