storybook/examples/angular-cli/.storybook/config.ts

import { configure, addDecorator } from '@storybook/angular';
import { withOptions } from '@storybook/addon-options';
import addCssWarning from '../src/cssWarning';

addCssWarning();

addDecorator(
  withOptions({
    hierarchyRootSeparator: /\|/,
  })
);

function loadStories() {
  // put welcome screen at the top of the list so it's the first one displayed
  require('../src/stories');

  // automatically import all story ts files that end with *.stories.ts
  const req = require.context('../src/stories', true, /\.stories\.ts$/);
  req.keys().forEach(filename => req(filename));
}

configure(loadStories, module);