What are Angular Pipes and where are they used?

Quick Answer Pipes transform data in templates for display. Built-in pipes: date, currency, number, percent, uppercase, lowercase, json, slice, async. Usage: {{value | pipeName:param}}. Async pipe automatically subscribes to Observables/Promises and unsubscribes on destroy. Create custom pipes with @Pipe decorator and transform() method. Pure pipes only re-run when input reference changes.

Answer

Pipes are data transformation tools used inside Angular templates. They take input data, apply formatting, and return a transformed output.

Common uses include formatting dates, numbers, currency, converting text case, and filtering lists. Angular supports pure and impure pipes depending on performance and data needs.

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What are Angular Pipes and where are they used?

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