swt-test-component v0.0.1

1 - We need Stencil Component Starter

2 - Create Github repository

3 - Create NPM account where you will host Stencil - WebComponent

4 Adding Stencil - WebComponent to project

1. Stencil Component Starter

This is a starter project for building a standalone Web Component using Stencil.

Stencil is also great for building entire apps. For that, use the stencil-app-starter instead.

Stencil

Stencil is a compiler for building fast web apps using Web Components.

Stencil combines the best concepts of the most popular frontend frameworks into a compile-time rather than run-time tool. Stencil takes TypeScript, JSX, a tiny virtual DOM layer, efficient one-way data binding, an asynchronous rendering pipeline (similar to React Fiber), and lazy-loading out of the box, and generates 100% standards-based Web Components that run in any browser supporting the Custom Elements v1 spec.

Stencil components are just Web Components, so they work in any major framework or with no framework at all.

Getting Started

To start building a new web component using Stencil, clone this repo to a new directory:

git clone https://github.com/ionic-team/stencil-component-starter.git first-component
cd first-component
git remote rm origin

and run:

npm install
npm start

To build the component for production, run:

npm run build

To run the unit tests for the components, run:

npm test

Need help? Check out our docs here.

Naming Components

When creating new component tags, we recommend not using stencil in the component name (ex: <stencil-datepicker>). This is because the generated component has little to nothing to do with Stencil; it's just a web component!

Instead, use a prefix that fits your company or any name for a group of related components. For example, all of the Ionic generated web components use the prefix ion.

Using this component

There are three strategies we recommend for using web components built with Stencil.

The first step for all three of these strategies is to publish to NPM.

Script tag

• Put a script tag similar to this <script src='https://unpkg.com/first-component@0.0.1/dist/mycomponent.js'></script> in the head of your index.html
• Then you can use the element anywhere in your template, JSX, html etc

Node Modules

• Run npm install first-component --save
• Put a script tag similar to this <script src='node_modules/first-component/dist/mycomponent.js'></script> in the head of your index.html
• Then you can use the element anywhere in your template, JSX, html etc

In a stencil-starter app

• Run npm install first-component --save
• Add an import to the npm packages import first-component;
• Then you can use the element anywhere in your template, JSX, html etc

test-stencils

4. Adding Stencil - WebComponent to project

• Angular project:

• Include the CUSTOM_ELEMENTS_SCHEMA in the modules that use the components.

import { BrowserModule } from '@angular/platform-browser';
import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';

import { AppComponent } from './app.component';

@NgModule({
  declarations: [AppComponent],
  imports: [BrowserModule, FormsModule],
  bootstrap: [AppComponent],
  schemas: [CUSTOM_ELEMENTS_SCHEMA],
})
export class AppModule {}

• Call defineCustomElements() from main.ts (or some other appropriate place).

Calling defineCustomElements:

import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

import { AppModule } from './app/app.module';
import { environment } from './environments/environment';

// Note: loader import location set using "esmLoaderPath" within the output target config
import { defineCustomElements } from 'test-components/loader';

if (environment.production) {
  enableProdMode();
}

platformBrowserDynamic().bootstrapModule(AppModule)
  .catch(err => console.log(err));
defineCustomElements();

Edge and IE11 polyfills If you want your custom elements to be able to work on older browsers, you should add the applyPolyfills() that surround the defineCustomElements() function.

import { applyPolyfills, defineCustomElements } from 'test-components/loader';
...
applyPolyfills().then(() => {
  defineCustomElements()
})

• Accessing components