[Solved] Which of the following is the correct way to declare an impure pipe in Angular? — Ans: @Pipe({ name: 'examplePipe', pure: false }) | Angular

Angular - Pipes

Which of the following is the correct way to declare an impure pipe in Angular?

A@Pipe({ name: 'examplePipe', pure: false })

B@Pipe({ name: 'examplePipe', impure: true })

C@Pipe({ name: 'examplePipe' })

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

Step-by-Step Solution

Solution:

Step 1: Recall pipe metadata syntax
Angular pipes use the @Pipe decorator with a 'pure' property to indicate purity.
Step 2: Identify impure pipe declaration
Setting 'pure: false' marks the pipe as impure, causing it to run every change detection cycle.
Final Answer:
@Pipe({ name: 'examplePipe', pure: false }) -> Option A
Quick Check:
Impure pipe uses pure: false [OK]

Quick Trick: Impure pipes set pure to false in @Pipe decorator [OK]

Common Mistakes:

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Which of the following is the correct way to declare an impure pipe in Angular?