```ts
// Button.stories.ts

import type { Meta, Story } from '@storybook/angular';

import { Button } from './button.component';

export default {
  /* 👇 The title prop is optional.
   * See https://storybook.js.org/docs/7.0/angular/configure/overview#configure-story-loading
   * to learn how to generate automatic titles
   */
  title: 'Button',
  component: Button,
} as Meta;

/*
 *👇 Render functions are a framework specific feature to allow you control on how the component renders.
 * See https://storybook.js.org/docs/7.0/angular/api/csf
 * to learn how to use render functions.
 */
export const Primary: Story = {
  args: {
    label: 'Button',
    backgroundColor: '#ff0',
  },
};

export const Secondary: Story = {
  args: {
    ...Primary.args,
    label: '😄👍😍💯',
  },
};

export const Tertiary: Story = {
  args: {
    ...Primary.args,
    label: '📚📕📈🤓',
  },
};
```