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Salman Kazmi
Salman Kazmi

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Content Projection in Angular - Part 2

In the previous article on this topic, I touched the basics of Content Projection with Angular and how easily one can work with dynamic templates without much fuss. I also discussed the use case where one may need to project content to a Component dynamically.

Continuing in this post, I will touch some advanced use case scenarios where we can leverage the power that Angular provides.

Now, to discuss further, a Component provides us a functionality where we may pass the template in between the opening and closing braces of the component where we use it as a child in our template.

Like <demo><h1>This is the template for content projection</h1></demo>

The contents of the <h1> tag will be displayed where <ng-content> tag is present in the child i.e., demo component.

What if the child has several <ng-content> tags. How can we pass the template to a particular <ng-content> tag thereby rendering the dynamic view to its correct position?

Let's discuss Targeted Projection.

Angular provides us with the select attribute of the ng-content tag. With this attribute, we can actually work with targeted projection.

Use case 1:

<ng-content select="[first-place]"></ng-content>

The template can be passed as follows:

   <p first-place>Hello World!</p>

Use case 2:

<ng-content select="[place='first']"></ng-content>
<ng-content select="[place='second']"></ng-content>

The template can be passed as follows:

   <p place='first'>Content 1</p>
   <p place='second'>Content 2</p>

Use case 3:

<ng-content select=".place-first"></ng-content>
<ng-content select=".place-second"></ng-content>

The template can be passed as follows:

   <p class='place-first'>Content 1</p>
   <p class='place-second'>Content 2</p>

There are a few other use cases as well, which I will keep for some other day to discuss. I hope this post proves to be useful in you Angular learning journey. Cheers!

Oldest comments (1)

scooperdev profile image
Stephen Cooper

If you like content projection you will love ngtemplateoutlets!

12 Rarely Used Javascript APIs You Need

>> Check out this classic DEV post <<