[Solved] Identify the mistake in this Angular pipe decorator:@Pipe({name: 'filterPipe', pure: 'true'}) — Ans: The 'pure' property should be a boolean, not a string | Angular

Angular - Pipes

Identify the mistake in this Angular pipe decorator:

@Pipe({name: 'filterPipe', pure: 'true'})

AThe pipe name cannot contain uppercase letters

BThe 'name' property must be capitalized

CThe decorator should be @PipeTransform, not @Pipe

DThe 'pure' property should be a boolean, not a string

Step-by-Step Solution

Solution:

Step 1: Check property types
The 'pure' property expects a boolean value, not a string.
Step 2: Validate other options
The 'name' property must be capitalized is incorrect because 'name' is case-sensitive but lowercase is valid. The decorator should be @PipeTransform, not @Pipe confuses decorator with interface. The pipe name cannot contain uppercase letters is false; pipe names can have lowercase letters.
Final Answer:
The 'pure' property should be a boolean, not a string -> Option D
Quick Check:
Boolean values for 'pure' property only [OK]

Quick Trick: 'pure' must be boolean true/false, not string [OK]

Common Mistakes:

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