Gain insights into Angular’s built-in directives and pipes, and delve into creating custom ones. Learn about their real-world applications to boost your project's performance and code readability.

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Directives and pipes are incredible and often undervalued features of the Angular framework. They allow us to write efficient code, improve application performance, and omit code duplications.

In this course, you will learn about the theory and the working mechanisms of built-in directives and pipes in Angular. You’ll also implement some custom directives and pipes to learn about their real-world application cases. With this course, you will improve your Angular skills and refine your project’s codebase to increase the performance and readability of your code.

Directives and Pipes in Angular

## Explanation
The only thing we need to change is the directive's selector. We can match all elements with the class name `header` as follows:

```tsx
@Directive({
  selector: '.header'
})
export class BoldDirective {

  constructor(el: ElementRef) {
    el.nativeElement.style.fontWeight = 'bold';
  }
}
```

## Solution
Here's an example of what the solution for this task may look like:


# Explanation
The only thing we need to change is the directive's selector. We can match all elements with the class name `header` as follows:

```tsx
@Directive({
  selector: '.header'
})
export class BoldDirective {

  constructor(el: ElementRef) {
    el.nativeElement.style.fontWeight = 'bold';
  }
}
```

# Solution
Here's an example of what the solution for this task may look like:


Let’s compare our results against the expected outcome.

Getting Started

Directives

Test: Built-in Directives

Attribute Directives

Test: Attribute Directives

Structural Directives

Test: Structural Directives

Advanced Techniques Using Directives

Test: Advanced Directives

Directives Summary

Pipes

Test: Pipes

Pipes summary

Solution: Practice with Directives

Explanation

Solution