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What will happen if hydration is enabled but the server-rendered HTML does not match the client component tree?

medium📝 component behavior Q5 of 15
Angular - Server-Side Rendering
What will happen if hydration is enabled but the server-rendered HTML does not match the client component tree?
AAngular will silently ignore the mismatch and continue
BThe app will crash immediately
CAngular will throw a hydration mismatch warning and re-render the component
DHydration will be skipped and events will not attach
Step-by-Step Solution
Solution:

  1. Step 1: Understand hydration mismatch behavior

    Angular detects mismatches and warns, then re-renders to fix the UI.

  2. Step 2: Check other options

    Angular does not silently ignore mismatches or crash immediately; hydration is not skipped silently.

  3. Final Answer:

    Angular will throw a hydration mismatch warning and re-render the component -> Option C

  4. Quick Check:

    Mismatch causes warning and re-render = True [OK]
Quick Trick: Mismatch triggers warning and re-render, not silent failure [OK]
Common Mistakes:
  • Believing Angular ignores mismatches silently
  • Thinking hydration skips event attachment on mismatch
  • Assuming app crashes immediately on mismatch

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