Stencil components in Angular

Stencil is not a JS framework. It is a compiler that produces a reusable web component that can be embedded anywhere else.

This is a step by step guide to consume a non-trivial stencil component in an Angular app.

The starter Angular app was created with Angular CLI.

Similar guides

• Stencil components in React
• Stencil components in Vue

Table of contents

• Add the component(s) to the dependencies
• Import the component
• Consume the component

0: Build a stenciljs component and publish it to npm

Creating your first stencil component is very easy and it is well documented here.

This example will consume two components:

• @openchemistry/molecule-vtkjs : To display molecular structures
• split-me : To create resizable split layouts

1: Add the component(s) to the dependencies

Add the component to the app dependencies in package.json

// package.json

"dependencies": {
  ...
  "@openchemistry/molecule-vtkjs": "^0.1.9",
  "split-me": "^0.3.1"
}

2: Import the component(s)

Import the component in the main.js of the app:

import { defineCustomElements as defineMolecule } from '@openchemistry/molecule-vtkjs';
import { defineCustomElements as defineSplitMe } from 'split-me';

defineMolecule(window);
defineSplitMe(window);

3: Consume the component

To prevent Angular from complaining that there is an unrecognized component tag, add CUSTOM_ELEMENTS_SCHEMA to the schemas array in app.module.ts.

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

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

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

It is now possible to use the tag provided by the stencil component in any template of the app.

<split-me n="2">
  <oc-molecule-vtkjs slot="0" [cjson]="molecule0"></oc-molecule-vtkjs>
  <oc-molecule-vtkjs slot="1" [cjson]="molecule1"></oc-molecule-vtkjs>
</split-me>