What are pipes in Angular and give an example of a built-in pipe?

• The concept of pipes in Angular is a powerful feature that allows developers to transform data directly within the template, making it easier to display and manipulate information for users.
  • One example of a built-in pipe in Angular is the ‘date’ pipe, which can be used to format a date object in various ways such as ‘short’, ‘medium’, or ‘long’ formats for displaying dates to users.
• One example of a built-in pipe in Angular is the ‘uppercase’ pipe, which converts all letters in a string to uppercase. This can be useful for styling text or displaying consistent formatting throughout an application.
  • For example, if a developer wants to display a date in a specific format such as “MM/dd/yyyy”, they can simply use the ‘date’ pipe in the template to achieve this without having to write additional code. Another example is if a user inputs their name in lowercase letters, the ‘uppercase’ pipe can easily convert it to uppercase for a more visually appealing presentation on the frontend.
•  Pipes can also be customized or created by developers to meet specific needs within an application. This flexibility allows for greater control over how data is displayed and manipulated on the front end.
  • For instance, a developer may create a custom ‘currencyConverter’ pipe to convert different currencies based on real-time exchange rates, providing users with accurate and up-to-date information. Another example could be a ‘filterByCategory’ pipe that filters a list of products based on their category, allowing users to easily find the items they are looking for on an e-commerce website.
• In addition to transforming strings, pipes can also work with arrays, numbers, dates, and other types of data in Angular applications. This versatility makes them a valuable tool for handling various types of information.
  • For example, a ‘sortArrayByDate’ pipe could be created to arrange a list of events or tasks in chronological order, helping users stay organized and prioritize their schedule effectively. Another example could be a ‘formatPhoneNumber’ pipe that standardizes phone numbers entered by users, ensuring consistency and accuracy in contact information stored in a database.
• Understanding how to use pipes effectively can help improve the user experience by presenting data in a clear and concise manner while reducing the amount of code needed for complex transformations within an Angular application.
  • For instance, a ‘filterByCategory’ pipe could be implemented to categorize and display products on an e-commerce website based on user preferences, simplifying the browsing process for customers. Additionally, a ‘calculateDiscount’ pipe could be utilized to automatically apply discounts to items in a shopping cart, streamlining the checkout process for users and enhancing their overall shopping experience.