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19th May, 2023

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How to Use Multiple Nested Pipes in Angular

Angular pipes are a powerful way to transform data in Angular applications. They can be used to format data, convert data types, and perform other data-related tasks.

In this blog post, we will learn how to use multiple nested pipes in Angular. We will also look at two examples of how nested pipes can be used to improve the functionality of Angular applications.

Using Multiple Nested Pipes

To use multiple nested pipes in Angular, you can use the pipe syntax with the pipe name followed by the value to be transformed. The pipes are evaluated in the order that they are specified.

For example, the following code will use the uppercase and slice pipes to display the first 10 characters of the title in uppercase letters:

Code snippet

{{title | uppercase | slice:0:10}}

Here is a breakdown of how the pipes are evaluated:

The uppercase pipe is evaluated first. This pipe converts the title to uppercase letters.
The slice pipe is evaluated next. This pipe takes the first 10 characters of the uppercase title.
The result of the slice pipe is displayed in the template.

You can use multiple nested pipes to perform complex data transformations. By using nested pipes, you can save time and code by combining multiple transformations into a single pipe.

Examples of Multiple Nested Pipes

Here are two examples of how nested pipes can be used to improve the functionality of Angular applications:

Example 1:

You can use nested pipes to format dates and times. For example, the following code will use the date and time pipes to display a date and time in a human-readable format:

Code snippet

{{date | date:'MMM d, yyyy' | time:'h:mm a'}}

Example 2:

You can use nested pipes to filter and sort data. For example, the following code will use the filter and sort pipes to display a list of items in alphabetical order:

Code snippet

<ul>
  <li *ngFor="let item of items | filter:predicate | sort:'name'">
    {{item.name}}
  </li>
</ul>

In this example, the predicate function is used to filter the items based on a certain criteria. The sort pipe is used to sort the items in alphabetical order by the name property.

I hope this blog post has been helpful. If you have any questions, please feel free to leave a comment below.

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