[Solved] You have this Angular component code:constructor(private cd: ChangeDetectorRef) {} update() { this.data = fetchData(); // missing change detection call }What problem might occur here? | Angular

Angular - Change Detection

You have this Angular component code:

constructor(private cd: ChangeDetectorRef) {}

update() {
  this.data = fetchData();
  // missing change detection call
}

What problem might occur here?

AThe data will be fetched twice

BThe app will throw a syntax error

CThe view may not update to show new data

DThe component will reload automatically

Step-by-Step Solution

Solution:

Step 1: Identify missing change detection trigger
After updating data, change detection must run to update the view.
Step 2: Predict effect of missing detection call
Without calling detectChanges(), the view may not reflect new data.
Final Answer:
The view may not update to show new data -> Option C
Quick Check:
Missing detectChanges() = stale view [OK]

Quick Trick: Call detectChanges() after data updates to refresh view [OK]

Common Mistakes:

MISTAKES

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