Building a Component Library with Angular and Storybook

Building a Component Library with Angular and Storybook

Learn how to build a component library with Angular and Storybook to create modular and reusable components that can be shared across projects.

Learn how to build a component library with Angular and Storybook to create modular and reusable components that can be shared across projects.

Storybook is a UI component explorer that visualizes components in different states. Storybook enables structured UI development, testing, and documentation for the major JavaScript frameworks.

Before we start

I have a habit of using short hands of script commands and flags so here are a some that I might use in this article:

npm install -> npm i
ng test -> ng t
ng generate ->  ng g
ng generate library -> ng g lib

Component Library

The goal is to have a component library that we can explore with Storybook. For this, I’m creating a library with a button component.


The Angular CLI is constantly getting better and the functionality I’m using here came with versions six and seven of Angular.

Make sure you have Angular CLI installed globally with:

npm i -g @angular/[email protected]

To begin with I’m going to create an empty workspace called ng-ui.

I don’t want to have an application and for that the --create-application flag is used with the ng new command. Setting this to false creates an empty workspace with no initial app.

ng new ng-ui --create-application=false

For deeper knowledge in this topic read this great article by Todd Palmer:


Now let’s create a component. Since each component is a library we can create one called button. Documentation for generate library.

ng g lib button -p ui

This creates the projects/button folder in your workspace, which contains a component and a service inside an NgModule. We don’t need the service so we can delete its files.

The workspace configuration file, angular.json, is updated with a project of type library.

As we can see, the architect has build, test, and lint so we can then use those commands.

ng build button
ng test button
ng lint button

The public API for your library is maintained in the public-api.ts file in your library folder. Anything exported from this file is made public when your library is imported into an application. Use an NgModule to expose services and components.

If you are using an older CLI you might have snake_case instead of kebab-case for this file: public_api.ts

I have written two articles that go more into detail about creating libraries, adding useful things to them, and using them in other projects:


import { Component, Input } from '@angular/core';

  selector: 'lib-button',
  template: `
export class ButtonComponent {
  @Input() text: string;
  @Input() disabled: boolean;

Now we can build the button library.

ng build button

And now let’s also pack it so we can install it in other projects. For this, I’m going to pack it to a tarball. Since we need to be in the button directory when we run npm pack we can create a script for it.

"scripts": {
  "pack_button": "cd dist/button && npm pack",

Now we can use npm run pack_button to get a tarball called button-0.0.1.tgz.

Or if you want to publish it to a repository use npm publish instead of pack.

For deeper knowledge on building and packaging you can read this great article by Todd Palmer:

If you are into scripting and automation like I am then you can read this article where I explain how to automate your process with multiple libraries**.**

Let’s see how we can use our button component in Storybook next.

Storybook is an environment for defining, developing, and testing UI components. It started as react-storybook but it is now open for other frameworks as well. Storybook is open source with a strong community behind it. Hundreds of contributors, tens of thousands of stars on GitHub, and millions of monthly downloads ensures a bright future.

It’s open source and totally free to use.


Now, let’s add Storybook to our project. It comes with a CLI tool that makes it really easy to add so let’s use it to initialize our project to a storybook project. Here I use npx so I don’t have to install it globally.

npx @storybook/cli init

It detects that our project is an Angular project and sets things up accordingly.

All the necessary configurations, devDependencies, and npm scripts are added to our project. It also created src/stories/index.stories.ts with example stories.

Since we didn’t have an application in our workspace we have to change the path to the TypeScript configuration file in storybook/tsconfig.json so that it instead extends the one in the root folder.

"extends": "../tsconfig.json"


We can now run storybook.

npm run storybook

This will start a local webpack server on port 6006 and you can visit the generated storybook by going to http://localhost:6006/. What you’ll see is an example Storybook that was generated from an index.stories.ts file under a stories folder at the root of the project.

You can see the generated sample stories in /stories/index.stories.ts.

There are two levels to the tree structure of Storybook. The component is defined by storiesOf and we use add for showing different views of it. You can add as many stories per component as you need.

And we can click to the corresponding button in the Storybook tree view.

Let’s delete these examples and create a story for the button we created in our library. To be able to use it we must first install it from the tarball we created.


We want to use the button library in our application so we use npm install like this:

npm i dist/button/button-0.0.1.tgz

Now if we open package.json we should see that the library is added to the dependencies.

"button": "file:dist/button/button-0.0.1.tgz"

If you instead published it to a repository you can install it as normal.

npm i button


Storybook is all about writing stories. A story usually contains a single state of one component, almost like a visual test case.

Let’s add a couple of stories to our button component. We have two input properties that we can test. For the first story, we send in ‘hello’ to the text property and get a normal button with hello written on it.

For the second story, we send in true to the disabled property and get a disabled button in the Storybook.

import { storiesOf } from '@storybook/angular';
import { ButtonComponent } from 'lib-button';

storiesOf('button', module)
  .add('basic', () => ({
    component: ButtonComponent,
    props: {
      text: 'hello'
  .add('disabled', () => ({
    component: ButtonComponent,
    props: {
      text: 'disabled',
      disabled: true

By adding stories for all permutations of the properties of the component we get visual tests for each use-case. We can test and play with our component in an isolated environment. And this also enables designers to work on styling the components that are used in the application.


We’ve seen how and why you should consider using Storybook with Angular. By visualizing your UI component library, Storybook can help both developers and designers become more productive. And by writing stories we can also test all use-cases of the components.

Top Web Application Developer

Top Web Application Developer

You can also contact a web application development company for your business but then why not to contact the best web application development company that can turn up your business and customer satisfaction ratio to sky touching heights.

Not long-ago internet came into existence and the world has never been the same ever since. The Internet made sure that people and business do evolve at a faster rate than ever and was never merciful to the slow ones. Because of this competition and availability of any business with few clicks made India one of the hubs as IT center. This trend of constantly updating has given rise to smartphones, smart machines, wearable gadgets and a lot more is yet to come in the upcoming years. In such time it is always a good idea to hire Web App Developer from India at your service. They are expert in developing not only websites but web applications as well.

We at HireFullStackDeveloperIndia, have a huge team of experienced developers that have grasped over different domains in front and back end development. You can hire web app developers in India from us with many advantages that you won’t get anywhere else in the industry.

Here is why we are the best option if you are looking forward to hiring web app developers in India:

  • Flexible hiring models available, as per your convenience and requirement
  • Maximum ROI, compared to any other company or team of developers.
  • We provide you with Source code Authorization meaning code written for you belong only to you. It cannot be used or copied anywhere else.
  • All of our developers are sound with agile development methodology, so you will be in a constant loop of suggestions, ideas, trends, and updates about your project.
  • Our developers are good with creating custom web applications as well; it guarantees you a better product without any compromise of non-existing functionalities.
  • You can save huge costing on infrastructure by utilizing our hire web app developer in India program.
  • Your hired developer or team will be easily accessible to your preferred mode of communication.
  • You get to exercise complete control over your team or individual that you hire.
  • We believe in Integrity and Transparency.
  • Our developers are highly creative and motivated to deliver excellence.

HireFullStackDeveloperIndia is a Web Application Development Company in India that is known worldwide for our Innovative guaranteed solutions. You can inquire with us about your project and we will be providing you multiple suitable developers that are the best fit for your requirements. You can evaluate them and select one or multiple whosoever deems fit to you. After this, all you have to do is provide your valuable input to the resource through sprint base project development until you get delivery of your project.

Our engagement model will also allow you to get our development team to your site location and proceed with development from your premises.

Web Development Services in USA

Web Development Services in USA

HireFullStackDeveloperIndia goal is to get the app downloaded millions of times, generate revenue and featured on app stores.

HireFullStackDeveloperIndia is a leading Web Application Development Company in USA that mission is simple: To help our clients see what they cannot see themselves. We work alongside elite brands to uncover what we believe to be simple truths: that all roads lead to web app. That they should dream bigger. And most importantly, that they’re underestimating how an amazing mobile experience can revolutionise the way they interact with their customers.

Visit us: What is the best Full Stack Development Company in Nevada, USA?