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ANGULAR INTERVIEW QUESTION: What are pipes?

ยท angular

A pipe is a native Angular element, which takes data in input and transforms it to a specified kind of output.

It is mainly for simple display arrangements.

๐“๐ก๐ž๐ซ๐ž ๐š๐ซ๐ž ๐ญ๐ฐ๐จ ๐ค๐ข๐ง๐๐ฌ ๐จ๐Ÿ ๐ฉ๐ข๐ฉ๐ž๐ฌ:

โ€•๐๐š๐ญ๐ข๐ฏ๐ž ๐ฉ๐ข๐ฉ๐ž๐ฌ which are directly available in your templates:

Your birthday is the {{ birthday | date }}

Here, in the example above, we use the pipes to transform a date in a pretty format, easy to read for the user.

The available pipes in Angular are: DatePipe, UpperCasePipe, LowerCasePipe, CurrencyPipe & PercentPipe.

โ€•๐‚๐ฎ๐ฌ๐ญ๐จ๐ฆ ๐ฉ๐ข๐ฉ๐ž๐ฌ that cover cases not covered by Angular:

๐˜๐จ๐ฎ ๐œ๐š๐ง ๐œ๐จ๐ฆ๐›๐ข๐ง๐ž ๐ฉ๐ข๐ฉ๐ž๐ฌ:

ย {{ birthday | date | uppercase }}

๐ˆ๐ง ๐œ๐จ๐ง๐œ๐ฅ๐ฎ๐ฌ๐ข๐จ๐ง, Pipes allows doing low complexity data transformations inside templates.

For more complex transformation, you would rather use services or dedicated components.

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