Angular - Components within Components | MyThinkPond

It’s good to be back blogging after a long hiatus. :-)

With the earlier versions of Angular creating nested components was not possible but with Angular6+ you can create nested components within components. Here’s how you can create them using the angular-cli. You can also perform the steps manually by creating the needed files one by one under a hierarchical structure as shown below.

Let’s take a look at an example of what we are trying to create.

Why nest Angular Components?

Let’s say we have a “Shopping” feature (as shown in this example below) and we want to have sub-components such as “Shopping-List”, “Shopping-List-Edit” option and so on. Traditionally, you would have created that as a flat list of components all organized under the /app directory. But as the project grows or as you have more team-members added to your project, you project gets more complex and you end up with too many files under /app directory making it difficult to manage and support. So having a hierarchical structure for your components makes sense. This also creates a mental visual as to how each of the components are related.

Here is how you will create the nested components under Angular (using the Angular-cli)

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// long-form, generates shopping component artifacts
ng generate component shopping
// short-form
ng g c shopping
// Create shopping-list below shopping
// Generates shopping-list artifacts under shopping component
ng g c shopping/shopping-list

// ** Complex Use-Case - Adding Components Into A Different Module **

// Using components with same name (not recommended)
// Let's say you had multiple modules,
// where you may have app.module.ts and leftnav.module.ts
// and you wanted to create this about-us under each module but
// use the same name then you can do the following
ng g c shopping/about-us --module=app.module
ng g c left-nav/about-us --module=leftnav.module
// This will add the newly created components as a member of that particular module.

It’s that simple.

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Now for Today’s Inspiration:

Three Steps In Cultivating Willpower:

  1. Finish what you begin.
  2. Do a little bit more than you think you can.
  3. Do a little bit better than you think you can.

Cheers!

Venkatt Guhesan avatar
About Venkatt Guhesan
Enterprise Software Architect currently working at DataDirect Networks developing a highly scalable monitoring solution called DDN Insight. My passions include all things Open Source including Linux (CentOS, Red Hat, Gentoo, Open Stack, Docker & Ubuntu), embedded ARM processors and microcontrollers (Arduino, UDOO, Cubieboard, BeagleBoard, OnionIO, TI's Zigbee). Coming from an Electrical and Computer Engineering background, working in developing and designing enterprise - distributed, highly scalable software requires a unique set of software skills with a good understanding of the hardware. This makes his work challenging and interesting. In his free time, he spends his time with his family and two children. He also enjoys researching on topics including - world ancient history and yoga. Visit the 'About' section for more details.
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