Debugging ExpressionChangedAfterItHasBeenChecked (NG0100) in Angular [2026]

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Lesson 10.2 of the Angular tutorial — why the ExpressionChangedAfterItHasBeenChecked (NG0100) check exists, the five root causes behind it, fixes with signals, computed(), linkedSignal() and afterNextRender(), the workarounds to avoid, and how zoneless change detection changes the picture.

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