Angular - Signals
How can you create a signal that depends on another signal's value and updates automatically when it changes?
How can you create a signal that depends on another signal's value and updates automatically when it changes?
hard📝 Conceptual Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Understand reactive dependencies in Angular
Signals can depend on other signals using computed() to create derived values.Step 2: Use computed() to auto-update dependent signal
computed(() => otherSignal() * 2) updates automatically when otherSignal changes.Final Answer:
Use computed() with a function reading the other signal -> Option CQuick Check:
Use computed() for derived reactive signals [OK]
Quick Trick: Use computed() to create signals depending on others [OK]
Common Mistakes:
- Manually syncing signals instead of computed
- Assigning values directly without signals
- Using signal() only for static values
Master "Signals" in Angular
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