Resources addon to dynamically add/remove css

ADDONS_SUPPORT.md

@@ -15,6 +15,7 @@
 |[links](addons/links)                       |+|+|+|+|+|+|+| |+|+|+|
 |[notes](addons/notes)                       |+|+*|+|+|+|+|+| |+|+|+|
 |[options](addons/options)                   |+|+|+|+|+|+|+| |+|+|+|
+|[cssresources](addons/cssresources)         |+| |+|+|+|+|+|+|+|+|+|
 |[storyshots](addons/storyshots)             |+|+|+|+| | |+| |+|+| |
 |[storysource](addons/storysource)           |+| |+|+|+|+|+|+|+|+|+|
 |[viewport](addons/viewport)                 |+| |+|+|+|+|+|+|+|+|+|

README.md

@@ -110,6 +110,7 @@ For additional help, join us [in our Discord](https://discord.gg/sMFvFsG) or [Sl
 | [actions](addons/actions/)                  | Log actions as users interact with components in the Storybook UI          |
 | [backgrounds](addons/backgrounds/)          | Let users choose backgrounds in the Storybook UI                           |
 | [centered](addons/centered/)                | Center the alignment of your components within the Storybook UI            |
+| [cssresources](addons/cssresources/)        | Dynamically add/remove css resources to the component iframe               |
 | [events](addons/events/)                    | Interactively fire events to components that respond to EventEmitter       |
 | [graphql](addons/graphql/)                  | Query a GraphQL server within Storybook stories                            |
 | [google-analytics](addons/google-analytics) | Reports google analytics on stories                                        |

addons/cssresources/README.md

@@ -0,0 +1,63 @@
+# Storybook Addon Cssresources
+
+Storybook Addon Cssresources to switch between css resources at runtime for your story [Storybook](https://storybook.js.org).
+
+[Framework Support](https://github.com/storybooks/storybook/blob/master/ADDONS_SUPPORT.md)
+
+![Storybook Addon Cssresources Demo](docs/demo.gif)
+
+## Installation
+
+```sh
+yarn add -D @storybook/addon-cssresources
+```
+
+## Configuration
+
+Then create a file called `addons.js` in your storybook config.
+
+Add following content to it:
+
+```js
+import '@storybook/addon-cssresources/register';
+```
+
+## Usage
+
+You need add the all the css resources at compile time using the `withCssResources` decorator. They can be added globally or per story. You can then choose which ones to load from the cssresources addon ui:
+
+```js
+// Import from @storybook/X where X is your framework
+import { configure, addDecorator, storiesOf } from '@storybook/react';
+import { withCssResources } from '@storybook/addon-cssresources';
+
+// global
+addDecorator(
+  withCssResources({
+    cssresources: [{
+        name: `bluetheme`,
+        code: `<style>body { background-color: lightblue; }</style>`,
+        picked: false,
+      },
+    ],
+  })
+);
+
+// per story
+storiesOf('Addons|Cssresources', module)
+  .addDecorator(
+    withCssResources({
+      cssresources: [{
+          name: `fontawesome`,
+          code: `<link rel="stylesheet" type="text/css" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css"></link>`,
+          picked: true,
+        }, {
+          name: `whitetheme`,
+          code: `<style>.fa { color: #fff }</style>`,
+          picked: true,
+        },
+      ],
+    })
+  )
+  .add('Camera Icon', () => <i className="fa fa-camera-retro"> Camera Icon</i>);
+```

addons/cssresources/package.json

@@ -0,0 +1,39 @@
+{
+  "name": "@storybook/addon-cssresources",
+  "version": "4.1.0-alpha.8",
+  "description": "A storybook addon to switch between css resources at runtime for your story",
+  "keywords": [
+    "addon",
+    "cssresources",
+    "react",
+    "storybook"
+  ],
+  "homepage": "https://storybook.js.org",
+  "bugs": {
+    "url": "https://github.com/storybooks/storybook/issues"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/storybooks/storybook.git"
+  },
+  "license": "MIT",
+  "author": "nm123github",
+  "main": "dist/index.js",
+  "jsnext:main": "src/index.js",
+  "scripts": {
+    "prepare": "node ../../scripts/prepare.js"
+  },
+  "dependencies": {
+    "@emotion/styled": "0.10.6",
+    "@storybook/addons": "4.1.0-alpha.8",
+    "@storybook/components": "4.1.0-alpha.8",
+    "@storybook/core-events": "4.1.0-alpha.8",
+    "global": "^4.3.2",
+    "prop-types": "^15.6.2",
+    "react-syntax-highlighter": "^10.0.0",
+    "util-deprecate": "^1.0.2"
+  },
+  "peerDependencies": {
+    "react": "*"
+  }
+}

addons/cssresources/register.js

@@ -0,0 +1 @@
+require('./dist/register.js');

addons/cssresources/src/CssResourcePanel.js

@@ -0,0 +1,147 @@
+import { document, DOMParser } from 'global';
+import React, { Component } from 'react';
+import PropTypes from 'prop-types';
+import { monoFonts } from '@storybook/components';
+import styled from '@emotion/styled';
+
+import css from 'react-syntax-highlighter/dist/esm/languages/prism/css';
+import { darcula } from 'react-syntax-highlighter/dist/esm/styles/prism';
+import SyntaxHighlighter from 'react-syntax-highlighter/dist/esm/prism-light';
+
+SyntaxHighlighter.registerLanguage('css', css);
+
+const storybookIframe = 'storybook-preview-iframe';
+const addedElAttr = 'addedbycssresourcesaddon';
+
+// Taken from StoryPanel.js
+const highlighterTheme = {
+  ...darcula,
+  'pre[class*="language-"]': {
+    ...darcula['pre[class*="language-"]'],
+    margin: 'auto',
+    width: 'auto',
+    height: 'auto',
+    minHeight: '100%',
+    overflow: 'hidden',
+    boxSizing: 'border-box',
+    display: 'flex',
+    fontFamily: monoFonts.fontFamily,
+    fontSize: 'inherit',
+  },
+  'code[class*="language-"]': {
+    ...darcula['code[class*="language-"]'],
+    margin: 0,
+    fontFamily: 'inherit',
+  },
+};
+
+const PanelWrapper = styled.div({
+  position: 'absolute',
+  top: '10px',
+  left: '10px',
+  fontFamily: monoFonts.fontFamily,
+});
+
+export default class CssResourcePanel extends Component {
+  constructor(props) {
+    super(props);
+    this.state = { cssresources: `` };
+    this.onAddCssresources = this.onAddCssresources.bind(this);
+    this.parser = new DOMParser();
+  }
+
+  componentDidMount() {
+    const { channel } = this.props;
+    this.iframe = document.getElementById(storybookIframe);
+    if (!this.iframe) {
+      throw new Error('Cannot find Storybook iframe');
+    }
+    channel.on('storybook/resources/add_cssresources', this.onAddCssresources);
+  }
+
+  componentWillUnmount() {
+    const { channel } = this.props;
+    channel.removeListener('storybook/resources/add_cssresources', this.onAddCssresources);
+  }
+
+  onAddCssresources(cssresources) {
+    this.loadCssresources(cssresources.filter(res => res.picked));
+    this.setState(prevState => ({ ...prevState, cssresources }));
+  }
+
+  handleChange(i, { target }) {
+    const { channel } = this.props;
+    const { cssresources = [] } = this.state;
+    cssresources[i].picked = target.checked;
+    channel.emit('storybook/resources/add_cssresources', cssresources);
+  }
+
+  loadCssresources(cssresources) {
+    // remove previously added elements!
+    this.iframe.contentDocument.head.querySelectorAll(`[${addedElAttr}]`).forEach(eL => {
+      if (eL) {
+        eL.parentNode.removeChild(eL);
+      }
+    });
+
+    // add new elements!
+    const str = cssresources.map(res => res.code).join('');
+    const parsedHtml = this.parser.parseFromString(str, 'text/html');
+    const elements = parsedHtml.querySelectorAll('head > *');
+    elements.forEach(eL => {
+      // add addedElAttr to css elements
+      eL.setAttribute(addedElAttr, '');
+      this.iframe.contentDocument.head.appendChild(eL);
+    });
+  }
+
+  render() {
+    const { cssresources = [] } = this.state;
+    const { active } = this.props;
+
+    if (!active) {
+      return null;
+    }
+
+    return (
+      <PanelWrapper className="addon-cssresources-container">
+        {cssresources &&
+          cssresources.map(({ name, code, picked }, i) => (
+            <div key={name} style={{ padding: 10 }}>
+              <div style={{ fontSize: '1.1em', marginBottom: 10 }}>
+                <input
+                  id={`cssresource${i}`}
+                  style={{ fontSize: '1.5em' }}
+                  type="checkbox"
+                  checked={picked}
+                  onChange={this.handleChange.bind(this, i)}
+                />
+                <label htmlFor={`cssresource${i}`}>#{name}</label>
+              </div>
+              <SyntaxHighlighter
+                language="css"
+                style={highlighterTheme}
+                customStyle={{ opacity: picked ? 1 : 0.5 }}
+              >
+                {code}
+              </SyntaxHighlighter>
+            </div>
+          ))}
+      </PanelWrapper>
+    );
+  }
+}
+
+CssResourcePanel.propTypes = {
+  active: PropTypes.bool.isRequired,
+  channel: PropTypes.shape({
+    on: PropTypes.func,
+    emit: PropTypes.func,
+    removeListener: PropTypes.func,
+  }).isRequired,
+  api: PropTypes.shape({
+    onStory: PropTypes.func,
+    getQueryParam: PropTypes.func,
+    setQueryParams: PropTypes.func,
+  }).isRequired,
+};

addons/cssresources/src/index.js

@@ -0,0 +1,23 @@
+import addons, { makeDecorator } from '@storybook/addons';
+
+export const withCssResources = makeDecorator({
+  name: 'withCssResources',
+  parameterName: 'cssresources',
+  skipIfNoParametersOrOptions: true,
+  allowDeprecatedUsage: false,
+  wrapper: (getStory, context, { options, parameters }) => {
+    const channel = addons.getChannel();
+    const storyOptions = parameters || options;
+
+    if (!Array.isArray(storyOptions) && !Array.isArray(storyOptions.cssresources)) {
+      throw new Error('The `cssresources` parameter needs to be an Array');
+    }
+
+    channel.emit(
+      'storybook/resources/add_cssresources',
+      Array.isArray(storyOptions) ? storyOptions : storyOptions.cssresources
+    );
+
+    return getStory(context);
+  },
+});

addons/cssresources/src/register.js

@@ -0,0 +1,12 @@
+import React from 'react';
+import addons from '@storybook/addons';
+import CssResourcePanel from './CssResourcePanel';
+
+addons.register('storybook/cssresources', api => {
+  const channel = addons.getChannel();
+  addons.addPanel('storybook/cssresources/panel', {
+    title: 'Cssresources',
+    // eslint-disable-next-line react/prop-types
+    render: ({ active }) => <CssResourcePanel channel={channel} api={api} active={active} />,
+  });
+});

addons/info/src/__snapshots__/index.test.js.snap

@@ -2880,6 +2880,7 @@ exports[`addon Info should render component description 1`] = `
         </div>
       </div>
       <div
+        id="story-root"
         style={Object {}}
       >
         <div>

examples/official-storybook/addons.js

@@ -5,6 +5,7 @@ import '@storybook/addon-events/register';
 import '@storybook/addon-notes/register';
 import '@storybook/addon-options/register';
 import '@storybook/addon-knobs/register';
+import '@storybook/addon-cssresources/register';
 import '@storybook/addon-backgrounds/register';
 import '@storybook/addon-a11y/register';
 import '@storybook/addon-jest/register';

examples/official-storybook/config.js

@@ -4,6 +4,7 @@ import { configure, addDecorator } from '@storybook/react';
 import { themes } from '@storybook/components';
 import { withOptions } from '@storybook/addon-options';
 import { configureViewport, INITIAL_VIEWPORTS } from '@storybook/addon-viewport';
+import { withCssResources } from '@storybook/addon-cssresources';
 
 import 'react-chromatic/storybook-addon';
 import addHeadWarning from './head-warning';
@@ -34,6 +35,20 @@ addDecorator(
   })
 );
 
+addDecorator(
+  withCssResources({
+    cssresources: [
+      {
+        name: `bluetheme`,
+        code: `<style>body {
+  background-color: lightblue;
+}</style>`,
+        picked: false,
+      },
+    ],
+  })
+);
+
 addDecorator(
   (story, { kind }) =>
     kind === 'Core|Errors' ? (

examples/official-storybook/package.json

@@ -20,6 +20,7 @@
     "@storybook/addon-actions": "4.1.0-alpha.8",
     "@storybook/addon-backgrounds": "4.1.0-alpha.8",
     "@storybook/addon-centered": "4.1.0-alpha.8",
+    "@storybook/addon-cssresources": "4.1.0-alpha.8",
     "@storybook/addon-events": "4.1.0-alpha.8",
     "@storybook/addon-graphql": "4.1.0-alpha.8",
     "@storybook/addon-info": "4.1.0-alpha.8",

examples/official-storybook/stories/__snapshots__/addon-cssresources.stories.storyshot

@@ -0,0 +1,18 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Storyshots Addons|Cssresources Camera Icon 1`] = `
+<i
+  class="fa fa-camera-retro"
+>
+   Camera Icon
+</i>
+`;
+
+exports[`Storyshots Addons|Cssresources Primary Large Button 1`] = `
+<button
+  class="btn btn-lg btn-primary"
+  type="button"
+>
+  Primary Large Button
+</button>
+`;