Why does Angular require the use of ngSwitchDefault instead of an empty ngSwitchCase for the default case?

hard📝 Conceptual Q10 of 15

Angular - Directives

Why does Angular require the use of *ngSwitchDefault instead of an empty *ngSwitchCase for the default case?

ABecause *ngSwitchDefault allows multiple default cases.

BBecause *ngSwitchDefault is faster to render than *ngSwitchCase.

CBecause *ngSwitchCase cannot be used inside

elements.

DBecause *ngSwitchCase requires a value to match, empty cases cause errors.

Step-by-Step Solution

Solution:

Step 1: Understand the role of *ngSwitchCase values
*ngSwitchCase must have a value to compare with the switch expression.
Step 2: Explain why empty *ngSwitchCase is invalid
An empty *ngSwitchCase has no value to match, causing Angular to throw an error.
Final Answer:
*ngSwitchCase requires a value to match, empty cases cause errors. -> Option D
Quick Check:
Default case uses *ngSwitchDefault, not empty *ngSwitchCase [OK]

Quick Trick: Default case must use *ngSwitchDefault, not empty *ngSwitchCase [OK]

Common Mistakes:

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