storybook/examples/official-storybook/stories/addon-knobs.stories.js

import React from 'react';
import PropTypes from 'prop-types';
import { storiesOf } from '@storybook/react';

import {
  withKnobs,
  withKnobsOptions,
  text,
  number,
  boolean,
  color,
  select,
  radios,
  array,
  date,
  button,
  object,
  files,
} from '@storybook/addon-knobs';

const ItemLoader = ({ isLoading, items }) => {
  if (isLoading) {
    return <p>Loading data</p>;
  }
  if (!items.length) {
    return <p>No items loaded</p>;
  }
  return (
    <ul>
      {items.map(i => (
        <li key={i}>{i}</li>
      ))}
    </ul>
  );
};

ItemLoader.propTypes = {
  isLoading: PropTypes.bool.isRequired,
  items: PropTypes.arrayOf(PropTypes.string).isRequired,
};
let injectedItems = [];
let injectedIsLoading = false;

storiesOf('Addons|Knobs.withKnobs', module)
  .addDecorator(withKnobs)
  .add('tweaks static values', () => {
    const name = text('Name', 'Storyteller');
    const age = number('Age', 70, { range: true, min: 0, max: 90, step: 5 });
    const fruits = {
      Apple: 'apple',
      Banana: 'banana',
      Cherry: 'cherry',
    };
    const fruit = select('Fruit', fruits, 'apple');

    const otherFruits = {
      Kiwi: 'kiwi',
      Guava: 'guava',
      Watermelon: 'watermelon',
    };
    const otherFruit = radios('Other Fruit', otherFruits, 'watermelon');
    const dollars = number('Dollars', 12.5, { min: 0, max: 100, step: 0.01 });
    const years = number('Years in NY', 9);

    const backgroundColor = color('background', '#dedede');
    const items = array('Items', ['Laptop', 'Book', 'Whiskey']);
    const otherStyles = object('Styles', {
      border: '2px dashed silver',
      borderRadius: 10,
      padding: '10px',
    });
    const nice = boolean('Nice', true);
    const images = files('Happy Picture', 'image/*', [
      'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAQAAAC1+jfqAAAABGdBTUEAALGPC/xhBQAAACBjSFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAAAmJLR0QA/4ePzL8AAAAHdElNRQfiARwMCyEWcOFPAAAAP0lEQVQoz8WQMQoAIAwDL/7/z3GwghSp4KDZyiUpBMCYUgd8rehtH16/l3XewgU2KAzapjXBbNFaPS6lDMlKB6OiDv3iAH1OAAAAJXRFWHRkYXRlOmNyZWF0ZQAyMDE4LTAxLTI4VDEyOjExOjMzLTA3OjAwlAHQBgAAACV0RVh0ZGF0ZTptb2RpZnkAMjAxOC0wMS0yOFQxMjoxMTozMy0wNzowMOVcaLoAAAAASUVORK5CYII=',
    ]);

    // NOTE: the default value must not change - e.g., do not do date('Label', new Date()) or date('Label')
    const defaultBirthday = new Date('Jan 20 2017 GMT+0');
    const birthday = date('Birthday', defaultBirthday);

    const intro = `My name is ${name}, I'm ${age} years old, and my favorite fruit is ${fruit}. I also enjoy ${otherFruit}.`;
    const style = { backgroundColor, ...otherStyles };
    const salutation = nice ? 'Nice to meet you!' : 'Leave me alone!';
    const dateOptions = { year: 'numeric', month: 'long', day: 'numeric', timeZone: 'UTC' };

    return (
      <div style={style}>
        <p>{intro}</p>
        <p>My birthday is: {new Date(birthday).toLocaleDateString('en-US', dateOptions)}</p>
        <p>I live in NY for {years} years.</p>
        <p>My wallet contains: ${dollars.toFixed(2)}</p>
        <p>In my backpack, I have:</p>
        <ul>
          {items.map(item => (
            <li key={item}>{item}</li>
          ))}
        </ul>
        <p>{salutation}</p>
        <p>
          When I am happy I look like this: <img src={images[0]} alt="happy" />
        </p>
      </div>
    );
  })
  .add('tweaks static values organized in groups', () => {
    const GROUP_IDS = {
      DISPLAY: 'DISPLAY',
      GENERAL: 'GENERAL',
      FAVORITES: 'FAVORITES',
    };

    const fruits = {
      Apple: 'apple',
      Banana: 'banana',
      Cherry: 'cherry',
    };

    const otherFruits = {
      Kiwi: 'kiwi',
      Guava: 'guava',
      Watermelon: 'watermelon',
    };

    // NOTE: the default value must not change - e.g., do not do date('Label', new Date()) or date('Label')
    const defaultBirthday = new Date('Jan 20 2017 GMT+0');

    // General
    const name = text('Name', 'Storyteller', GROUP_IDS.GENERAL);
    const age = number('Age', 70, { range: true, min: 0, max: 90, step: 5 }, GROUP_IDS.GENERAL);
    const birthday = date('Birthday', defaultBirthday, GROUP_IDS.GENERAL);
    const dollars = number(
      'Account Balance',
      12.5,
      { min: 0, max: 100, step: 0.01 },
      GROUP_IDS.GENERAL
    );
    const years = number('Years in NY', 9, {}, GROUP_IDS.GENERAL);

    // Favorites
    const nice = boolean('Nice', true, GROUP_IDS.FAVORITES);
    const fruit = select('Fruit', fruits, 'apple', GROUP_IDS.FAVORITES);
    const otherFruit = radios('Other Fruit', otherFruits, 'watermelon', GROUP_IDS.FAVORITES);
    const items = array('Items', ['Laptop', 'Book', 'Whiskey'], ',', GROUP_IDS.FAVORITES);

    // Display
    const backgroundColor = color('Color', 'rgba(126, 211, 33, 0.22)', GROUP_IDS.DISPLAY);
    const otherStyles = object(
      'Styles',
      {
        border: '2px dashed silver',
        borderRadius: 10,
        padding: '10px',
      },
      GROUP_IDS.DISPLAY
    );

    const style = { backgroundColor, ...otherStyles };

    const salutation = nice ? 'Nice to meet you!' : 'Leave me alone!';
    const dateOptions = { year: 'numeric', month: 'long', day: 'numeric', timeZone: 'UTC' };

    return (
      <div style={style}>
        <h1>General Information</h1>
        <p>Name: {name}</p>
        <p>Age: {age}</p>
        <p>Birthday: {new Date(birthday).toLocaleDateString('en-US', dateOptions)}</p>
        <p>Account Balance: {dollars}</p>
        <p>Years in NY: {years}</p>
        <hr />
        <h1>Favorites</h1>
        <p>Catchphrase: {salutation}</p>
        <p>Fruit: {fruit}</p>
        <p>Other Fruit: {otherFruit}</p>
        <p>Items:</p>
        <ul>
          {items.map(item => (
            <li key={`${item}`}>{item}</li>
          ))}
        </ul>
      </div>
    );
  })
  .add('dynamic knobs', () => {
    const showOptional = select('Show optional', ['yes', 'no'], 'yes');
    return (
      <div>
        <div>{text('compulsary', 'I must be here')}</div>
        {showOptional === 'yes' ? <div>{text('optional', 'I can disapear')}</div> : null}
      </div>
    );
  })
  .add('triggers actions via button', () => {
    button('Toggle item list state', () => {
      if (!injectedIsLoading && injectedItems.length === 0) {
        injectedIsLoading = true;
      } else if (injectedIsLoading && injectedItems.length === 0) {
        injectedIsLoading = false;
        injectedItems = ['pencil', 'pen', 'eraser'];
      } else if (injectedItems.length > 0) {
        injectedItems = [];
      }
    });
    return (
      <div>
        <p>Hit the knob button and it will toggle the items list into multiple states.</p>
        <ItemLoader isLoading={injectedIsLoading} items={injectedItems} />
      </div>
    );
  })
  .add('XSS safety', () => (
    <div
      // eslint-disable-next-line react/no-danger
      dangerouslySetInnerHTML={{
        __html: text('Rendered string', '<img src="x" onerror="alert(\'XSS Attack\')" >'),
      }}
    />
  ))
  .add('accepts story parameters', () => <div>{text('Rendered string', '<h1>Hello</h1>')}</div>, {
    knobs: { escapeHTML: false },
  });

storiesOf('Addons|Knobs.withKnobs using options', module)
  .addDecorator(
    withKnobs({
      escapeHTML: false,
    })
  )
  .add('accepts options', () => <div>{text('Rendered string', '<h1>Hello</h1>')}</div>);

storiesOf('Addons|Knobs.withKnobsOptions', module)
  .addDecorator(
    withKnobsOptions({
      escapeHTML: false,
    })
  )
  .add('displays HTML code', () => <div>{text('Rendered string', '<h1>Hello</h1>')}</div>);