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apps/ngfor-enhancement/README.md
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<h1>Directive enhancement</h1>
# Directive Enhancement
> Author: Thomas Laforge
## Information
### Run Application
Directive is a very powerful tool only offered by the Angular framework. You can apply the DRY principal by having shared logic inside a directive and applying it to any component you want.
But the real power is that you can enhance an already existing directive which moreover doesn't **belong** to you.
## Statement
In this exercice, we have a want to display a list of persons. If the list is empty, you must display _" the list is empty !! "_.
Currently we have :
```typescript
<ng-container *ngIf="persons.length > 0; else emptyList">
<div *ngFor="let person of persons">
{{ person.name }}
</div>
</ng-container>
<ng-template #emptyList>The list is empty !!</ng-template>
```bash
npx nx serve ngfor-enhancement
```
We want to get rid of the ng-container by writing :
### Documentation and Instruction
```typescript
<div *ngFor="let person of persons; empty: emptyList">
{{ person.name }}
</div>
<ng-template #emptyList>The list is empty !!</ng-template>
```
The goal is to **improve the ngFor directive**
## Submitting your work
1. Fork the project
2. clone it
3. npm ci
4. **nx serve ngfor-enhancement**
5. _...work On it_
6. Commit your work
7. Submit a PR with a title beginning with **Answer:3** that I will review and other dev can review.
<a href="https://github.com/tomalaforge/angular-challenges/pulls?q=label%3A3+label%3Aanswer" target="_blank"><img src="https://img.shields.io/badge/-Solutions-green" alt="Directive enhancement"/></a>
<a href='https://github.com/tomalaforge/angular-challenges/pulls?q=label%3A3+label%3A"answer+author"'><img src="https://img.shields.io/badge/-Author solution-important" alt="Directive enhancement solution author"/></a>
<a href="https://medium.com/@thomas.laforge/ngfor-enhancement-716b44656a6c" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/badge/-Blog post explanation-blue" alt="Directive enhancement blog article"/></a>
_You can ask any question on_ <a href="https://twitter.com/laforge_toma" target="_blank"><img src="./../../logo/twitter.svg" height=20px alt="Twitter"/></a>
Challenge documentation is [here](https://angular-challenges.vercel.app/challenges/angular/3-directive-enhancement.md/).