What is a Pure Pipe in Angular?

In Angular, a pure pipe is a type of pipe that is considered “pure” because it only depends on its input parameters. This means that a pure pipe will only re-evaluate when the input parameters to the pipe change.

When using pure pipes in Angular, it can help improve performance by allowing the application to only recalculate and re-render the components that have actually changed. This can be particularly important when dealing with large datasets or complex calculations.

Using pure pipes can also help with the overall stability and predictability of the application, as it ensures that components are only updated when necessary.

When using pure pipes, it’s important to keep in mind that the input parameters to the pipe should be immutable. This means that if the input parameters change, a new reference should be created rather than mutating the existing reference.

Overall, pure pipes in Angular are a powerful tool for improving performance and stability in applications, and should be considered when working with data transformations and manipulations.