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Identify the error in this Angular template code:

medium📝 Debug Q6 of 15
Angular - Pipes
Identify the error in this Angular template code:
{{ user.name | uppercase | date }}
AApplying date pipe to a string is invalid
Buppercase pipe cannot be chained
CMissing parentheses after pipes
Duser.name should be a number for pipes
Step-by-Step Solution
Solution:
  1. Step 1: Analyze pipe chaining

    The code applies uppercase pipe first, which outputs a string.
  2. Step 2: Check compatibility of next pipe

    The date pipe expects a date or number, not a string, so applying it after uppercase causes an error.
  3. Final Answer:

    Applying date pipe to a string is invalid -> Option A
  4. Quick Check:

    Pipe chaining must match input/output types [OK]
Quick Trick: Pipe output type must match next pipe input [OK]
Common Mistakes:
  • Chaining incompatible pipes
  • Assuming all pipes accept any input
  • Forgetting pipe chaining rules

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