From 462f6126b422eda9ccc3c612739454aa78b87a9c Mon Sep 17 00:00:00 2001
From: Mark Dalgleish <mark.john.dalgleish@gmail.com>
Date: Wed, 18 Dec 2019 16:26:39 +1100
Subject: [PATCH] feat: Only render visible frames, avoid extra history entries
 (#106)

---
 .babelrc                         |   6 +-
 lib/makeWebpackConfig.js         |   6 +-
 package.json                     |   3 +
 src/Playroom/Preview/Iframe.tsx  |  98 ++++++++++-----
 src/Playroom/Preview/Preview.tsx |  89 +++++++-------
 yarn.lock                        | 205 ++++++++++++++++++++++++++++++-
 6 files changed, 324 insertions(+), 83 deletions(-)

diff --git a/.babelrc b/.babelrc
index 2518f76a..990249e7 100644
--- a/.babelrc
+++ b/.babelrc
@@ -4,5 +4,9 @@
     "@babel/preset-env",
     "@babel/preset-react"
   ],
-  "plugins": ["@babel/plugin-proposal-class-properties"]
+  "plugins": [
+    "@babel/plugin-proposal-class-properties",
+    "@babel/plugin-proposal-optional-chaining",
+    "@babel/plugin-proposal-nullish-coalescing-operator"
+  ]
 }
diff --git a/lib/makeWebpackConfig.js b/lib/makeWebpackConfig.js
index 652fee77..758c2032 100644
--- a/lib/makeWebpackConfig.js
+++ b/lib/makeWebpackConfig.js
@@ -67,7 +67,11 @@ module.exports = async (playroomConfig, options) => {
                 require.resolve('@babel/preset-typescript')
               ],
               plugins: [
-                require.resolve('@babel/plugin-proposal-class-properties')
+                require.resolve('@babel/plugin-proposal-class-properties'),
+                require.resolve('@babel/plugin-proposal-optional-chaining'),
+                require.resolve(
+                  '@babel/plugin-proposal-nullish-coalescing-operator'
+                )
               ]
             }
           }
diff --git a/package.json b/package.json
index 18b070a5..97975a50 100644
--- a/package.json
+++ b/package.json
@@ -58,6 +58,8 @@
     "@babel/cli": "^7.7.5",
     "@babel/core": "^7.7.5",
     "@babel/plugin-proposal-class-properties": "^7.7.4",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "^7.7.4",
+    "@babel/plugin-proposal-optional-chaining": "^7.7.5",
     "@babel/preset-env": "^7.7.6",
     "@babel/preset-react": "^7.7.4",
     "@babel/preset-typescript": "^7.7.4",
@@ -97,6 +99,7 @@
     "re-resizable": "^6.1.1",
     "react-codemirror2": "^6.0.0",
     "react-docgen-typescript": "^1.16.1",
+    "react-use": "^13.12.2",
     "read-pkg-up": "^7.0.1",
     "scope-eval": "^1.0.0",
     "style-loader": "^1.0.1",
diff --git a/src/Playroom/Preview/Iframe.tsx b/src/Playroom/Preview/Iframe.tsx
index 13137dff..ac229c57 100644
--- a/src/Playroom/Preview/Iframe.tsx
+++ b/src/Playroom/Preview/Iframe.tsx
@@ -1,35 +1,69 @@
-import React, { Component, AllHTMLAttributes } from 'react';
+import React, {
+  useState,
+  useEffect,
+  useRef,
+  AllHTMLAttributes,
+  MutableRefObject
+} from 'react';
+import { useIntersection } from 'react-use';
 
-interface State {
-  loaded: boolean;
+interface IframeProps extends AllHTMLAttributes<HTMLIFrameElement> {
+  src: string;
+  intersectionRootRef: MutableRefObject<Element | null>;
 }
-interface Props extends AllHTMLAttributes<HTMLIFrameElement> {}
-
-export default class Iframe extends Component<Props, State> {
-  constructor(props: Props) {
-    super(props);
-
-    this.state = {
-      loaded: false
-    };
-  }
-
-  handleLoad = () => {
-    this.setState({ loaded: true });
-  };
-
-  render() {
-    const { style, ...props } = this.props;
-    const { loaded } = this.state;
-
-    const combinedStyles = {
-      ...style,
-      transition: 'opacity .3s ease',
-      opacity: loaded ? 1 : 0
-    };
-
-    return (
-      <iframe onLoad={this.handleLoad} {...props} style={combinedStyles} />
-    );
-  }
+
+export default function Iframe({
+  intersectionRootRef,
+  style,
+  src,
+  ...restProps
+}: IframeProps) {
+  const [loaded, setLoaded] = useState(false);
+  const [renderedSrc, setRenderedSrc] = useState<string | null>(null);
+  const iframeRef = useRef<HTMLIFrameElement | null>(null);
+  const intersection = useIntersection(iframeRef, {
+    root: intersectionRootRef.current,
+    rootMargin: '800px',
+    threshold: 0
+  });
+
+  const intersectionRatio = intersection?.intersectionRatio ?? null;
+
+  useEffect(() => {
+    if (intersectionRatio === null) {
+      return;
+    }
+
+    if (intersectionRatio > 0 && src !== renderedSrc) {
+      setRenderedSrc(src);
+    }
+  }, [intersectionRatio, src, renderedSrc]);
+
+  useEffect(() => {
+    if (renderedSrc !== null) {
+      const location = iframeRef.current?.contentWindow?.location;
+
+      if (location) {
+        location.replace(renderedSrc);
+      }
+    }
+  }, [renderedSrc]);
+
+  return (
+    <iframe
+      ref={iframeRef}
+      onLoad={() => setLoaded(true)}
+      onMouseEnter={() => {
+        if (src !== renderedSrc) {
+          setRenderedSrc(src);
+        }
+      }}
+      style={{
+        ...style,
+        transition: 'opacity .3s ease',
+        opacity: loaded ? 1 : 0
+      }}
+      {...restProps}
+    />
+  );
 }
diff --git a/src/Playroom/Preview/Preview.tsx b/src/Playroom/Preview/Preview.tsx
index 51d12c56..6884bcaf 100644
--- a/src/Playroom/Preview/Preview.tsx
+++ b/src/Playroom/Preview/Preview.tsx
@@ -1,4 +1,4 @@
-import React, { Component, Fragment } from 'react';
+import React, { Fragment, useRef } from 'react';
 import flatMap from 'lodash/flatMap';
 import Iframe from './Iframe';
 import compileJsx from '../../utils/compileJsx';
@@ -7,58 +7,57 @@ import { PlayroomProps } from '../Playroom';
 // @ts-ignore
 import styles from './Preview.less';
 
-interface Props {
+interface PreviewProps {
   code: string;
   themes: string[];
   widths: PlayroomProps['widths'];
 }
 
-export default class Preview extends Component<Props> {
-  render() {
-    const { code, themes, widths } = this.props;
+export default function Preview({ code, themes, widths }: PreviewProps) {
+  const scrollingPanelRef = useRef<HTMLDivElement | null>(null);
 
-    const frames = flatMap(widths, width =>
-      themes.map(theme => ({ theme, width }))
-    );
+  const frames = flatMap(widths, width =>
+    themes.map(theme => ({ theme, width }))
+  );
 
-    let renderCode = code;
+  let renderCode = code;
 
-    try {
-      renderCode = compileJsx(code);
-    } catch (e) {
-      renderCode = '';
-    }
+  try {
+    renderCode = compileJsx(code);
+  } catch (e) {
+    renderCode = '';
+  }
 
-    return (
-      <div className={styles.root}>
-        {frames.map(frame => (
-          <div
-            key={`${frame.theme}_${frame.width}`}
-            className={styles.frameContainer}
-          >
-            <div className={styles.frameName}>
-              {frame.theme === '__PLAYROOM__NO_THEME__' ? (
-                <strong className={styles.strong}>
-                  {frame.width}
-                  px
-                </strong>
-              ) : (
-                <Fragment>
-                  <strong className={styles.strong}>{frame.theme}</strong>
-                  {` \u2013 ${frame.width}px`}
-                </Fragment>
-              )}
-            </div>
-            <Iframe
-              src={`frame.html#?themeName=${encodeURIComponent(
-                frame.theme
-              )}&code=${encodeURIComponent(renderCode)}`}
-              className={styles.frame}
-              style={{ width: frame.width }}
-            />
+  return (
+    <div ref={scrollingPanelRef} className={styles.root}>
+      {frames.map(frame => (
+        <div
+          key={`${frame.theme}_${frame.width}`}
+          className={styles.frameContainer}
+        >
+          <div className={styles.frameName}>
+            {frame.theme === '__PLAYROOM__NO_THEME__' ? (
+              <strong className={styles.strong}>
+                {frame.width}
+                px
+              </strong>
+            ) : (
+              <Fragment>
+                <strong className={styles.strong}>{frame.theme}</strong>
+                {` \u2013 ${frame.width}px`}
+              </Fragment>
+            )}
           </div>
-        ))}
-      </div>
-    );
-  }
+          <Iframe
+            intersectionRootRef={scrollingPanelRef}
+            src={`frame.html#?themeName=${encodeURIComponent(
+              frame.theme
+            )}&code=${encodeURIComponent(renderCode)}`}
+            className={styles.frame}
+            style={{ width: frame.width }}
+          />
+        </div>
+      ))}
+    </div>
+  );
 }
diff --git a/yarn.lock b/yarn.lock
index 2d435da0..80222e01 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -300,6 +300,14 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     "@babel/plugin-syntax-json-strings" "^7.7.4"
 
+"@babel/plugin-proposal-nullish-coalescing-operator@^7.7.4":
+  version "7.7.4"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-nullish-coalescing-operator/-/plugin-proposal-nullish-coalescing-operator-7.7.4.tgz#7db302c83bc30caa89e38fee935635ef6bd11c28"
+  integrity sha512-TbYHmr1Gl1UC7Vo2HVuj/Naci5BEGNZ0AJhzqD2Vpr6QPFWpUmBRLrIDjedzx7/CShq0bRDS2gI4FIs77VHLVQ==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.0.0"
+    "@babel/plugin-syntax-nullish-coalescing-operator" "^7.7.4"
+
 "@babel/plugin-proposal-object-rest-spread@^7.7.4":
   version "7.7.4"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-object-rest-spread/-/plugin-proposal-object-rest-spread-7.7.4.tgz#cc57849894a5c774214178c8ab64f6334ec8af71"
@@ -316,6 +324,14 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     "@babel/plugin-syntax-optional-catch-binding" "^7.7.4"
 
+"@babel/plugin-proposal-optional-chaining@^7.7.5":
+  version "7.7.5"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-optional-chaining/-/plugin-proposal-optional-chaining-7.7.5.tgz#f0835f044cef85b31071a924010a2a390add11d4"
+  integrity sha512-sOwFqT8JSchtJeDD+CjmWCaiFoLxY4Ps7NjvwHC/U7l4e9i5pTRNt8nDMIFSOUL+ncFbYSwruHM8WknYItWdXw==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.0.0"
+    "@babel/plugin-syntax-optional-chaining" "^7.7.4"
+
 "@babel/plugin-proposal-unicode-property-regex@^7.7.4":
   version "7.7.4"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-unicode-property-regex/-/plugin-proposal-unicode-property-regex-7.7.4.tgz#7c239ccaf09470dbe1d453d50057460e84517ebb"
@@ -352,6 +368,13 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
+"@babel/plugin-syntax-nullish-coalescing-operator@^7.7.4":
+  version "7.7.4"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-nullish-coalescing-operator/-/plugin-syntax-nullish-coalescing-operator-7.7.4.tgz#e53b751d0c3061b1ba3089242524b65a7a9da12b"
+  integrity sha512-XKh/yIRPiQTOeBg0QJjEus5qiSKucKAiApNtO1psqG7D17xmE+X2i5ZqBEuSvo0HRuyPaKaSN/Gy+Ha9KFQolw==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.0.0"
+
 "@babel/plugin-syntax-object-rest-spread@^7.0.0", "@babel/plugin-syntax-object-rest-spread@^7.7.4":
   version "7.7.4"
   resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-object-rest-spread/-/plugin-syntax-object-rest-spread-7.7.4.tgz#47cf220d19d6d0d7b154304701f468fc1cc6ff46"
@@ -366,6 +389,13 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
+"@babel/plugin-syntax-optional-chaining@^7.7.4":
+  version "7.7.4"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-optional-chaining/-/plugin-syntax-optional-chaining-7.7.4.tgz#c91fdde6de85d2eb8906daea7b21944c3610c901"
+  integrity sha512-2MqYD5WjZSbJdUagnJvIdSfkb/ucOC9/1fRJxm7GAxY6YQLWlUvkfxoNbUPcPLHJyetKUDQ4+yyuUyAoc0HriA==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.0.0"
+
 "@babel/plugin-syntax-top-level-await@^7.7.4":
   version "7.7.4"
   resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-top-level-await/-/plugin-syntax-top-level-await-7.7.4.tgz#bd7d8fa7b9fee793a36e4027fd6dd1aa32f946da"
@@ -741,7 +771,7 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     "@babel/plugin-transform-typescript" "^7.7.4"
 
-"@babel/runtime@^7.6.3":
+"@babel/runtime@^7.1.2", "@babel/runtime@^7.6.3":
   version "7.7.6"
   resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.7.6.tgz#d18c511121aff1b4f2cd1d452f1bac9601dd830f"
   integrity sha512-BWAJxpNVa0QlE5gZdWjSxXtemZyZ9RmrmVozxt3NUXeZhVIJ5ANyqmMc0JDrivBZyxUuQvFxlvH4OWWOogGfUw==
@@ -1681,6 +1711,11 @@
     "@webassemblyjs/wast-parser" "1.8.5"
     "@xtuc/long" "4.2.2"
 
+"@xobotyi/scrollbar-width@1.5.0":
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/@xobotyi/scrollbar-width/-/scrollbar-width-1.5.0.tgz#488210bff634548040dc22a72f62722a85b134e1"
+  integrity sha512-BK+HR1D00F2xh7n4+5en8/dMkG13uvIXLmEbsjtc1702b7+VwXkvlBDKoRPJMbkRN5hD7VqWa3nS9fNT8JG3CA==
+
 "@xtuc/ieee754@^1.2.0":
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/@xtuc/ieee754/-/ieee754-1.2.0.tgz#eef014a3145ae477a1cbc00cd1e552336dceb790"
@@ -2388,6 +2423,11 @@ bottleneck@^2.18.1:
   resolved "https://registry.yarnpkg.com/bottleneck/-/bottleneck-2.19.5.tgz#5df0b90f59fd47656ebe63c78a98419205cadd91"
   integrity sha512-VHiNCbI1lKdl44tGrhNfU3lup0Tj/ZBMJB5/2ZbNXRCPuRCO7ed2mgcK4r17y+KB2EfuYuRaVlwNbAeaWGSpbw==
 
+bowser@^1.7.3:
+  version "1.9.4"
+  resolved "https://registry.yarnpkg.com/bowser/-/bowser-1.9.4.tgz#890c58a2813a9d3243704334fa81b96a5c150c9a"
+  integrity sha512-9IdMmj2KjigRq6oWhmwv1W36pDuA4STQZ8q6YO9um+x07xgYNCD3Oou+WP/3L1HNz7iqythGet3/p4wvc8AAwQ==
+
 boxen@1.3.0, boxen@^1.2.1:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/boxen/-/boxen-1.3.0.tgz#55c6c39a8ba58d9c61ad22cd877532deb665a20b"
@@ -3390,6 +3430,13 @@ copy-descriptor@^0.1.0:
   resolved "https://registry.yarnpkg.com/copy-descriptor/-/copy-descriptor-0.1.1.tgz#676f6eb3c39997c2ee1ac3a924fd6124748f578d"
   integrity sha1-Z29us8OZl8LuGsOpJP1hJHSPV40=
 
+copy-to-clipboard@^3.2.0:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/copy-to-clipboard/-/copy-to-clipboard-3.2.0.tgz#d2724a3ccbfed89706fac8a894872c979ac74467"
+  integrity sha512-eOZERzvCmxS8HWzugj4Uxl8OJxa7T2k1Gi0X5qavwydHIfuSHq2dTD09LOg/XyGq4Zpb5IsR/2OJ5lbOegz78w==
+  dependencies:
+    toggle-selection "^1.0.6"
+
 core-js-compat@^3.4.7:
   version "3.4.8"
   resolved "https://registry.yarnpkg.com/core-js-compat/-/core-js-compat-3.4.8.tgz#f72e6a4ed76437ea710928f44615f926a81607d5"
@@ -3522,6 +3569,14 @@ crypto-random-string@^1.0.0:
   resolved "https://registry.yarnpkg.com/crypto-random-string/-/crypto-random-string-1.0.0.tgz#a230f64f568310e1498009940790ec99545bca7e"
   integrity sha1-ojD2T1aDEOFJgAmUB5DsmVRbyn4=
 
+css-in-js-utils@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/css-in-js-utils/-/css-in-js-utils-2.0.1.tgz#3b472b398787291b47cfe3e44fecfdd9e914ba99"
+  integrity sha512-PJF0SpJT+WdbVVt0AOYp9C8GnuruRlL/UFW7932nLWmFLQTaWEzTBQEx7/hn4BuV+WON75iAViSUJLiU3PKbpA==
+  dependencies:
+    hyphenate-style-name "^1.0.2"
+    isobject "^3.0.1"
+
 css-loader@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/css-loader/-/css-loader-1.0.1.tgz#6885bb5233b35ec47b006057da01cc640b6b79fe"
@@ -3559,6 +3614,14 @@ css-selector-tokenizer@^0.7.0:
     fastparse "^1.1.1"
     regexpu-core "^1.0.0"
 
+css-tree@^1.0.0-alpha.28:
+  version "1.0.0-alpha.39"
+  resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-1.0.0-alpha.39.tgz#2bff3ffe1bb3f776cf7eefd91ee5cba77a149eeb"
+  integrity sha512-7UvkEYgBAHRG9Nt980lYxjsTrCyHFN53ky3wVsDkiMdVqylqRt+Zc+jm5qw7/qyOvN2dHSYtX0e4MbCCExSvnA==
+  dependencies:
+    mdn-data "2.0.6"
+    source-map "^0.6.1"
+
 css-what@2.1:
   version "2.1.3"
   resolved "https://registry.yarnpkg.com/css-what/-/css-what-2.1.3.tgz#a6d7604573365fe74686c3f311c56513d88285f2"
@@ -3586,6 +3649,11 @@ csstype@^2.2.0:
   resolved "https://registry.yarnpkg.com/csstype/-/csstype-2.6.7.tgz#20b0024c20b6718f4eda3853a1f5a1cce7f5e4a5"
   integrity sha512-9Mcn9sFbGBAdmimWb2gLVDtFJzeKtDGIr76TUqmjZrw9LFXBMSU70lcs+C0/7fyCd6iBDqmksUcCOUIkisPHsQ==
 
+csstype@^2.5.5:
+  version "2.6.8"
+  resolved "https://registry.yarnpkg.com/csstype/-/csstype-2.6.8.tgz#0fb6fc2417ffd2816a418c9336da74d7f07db431"
+  integrity sha512-msVS9qTuMT5zwAGCVm4mxfrZ18BNc6Csd0oJAtiFMZ1FAx1CCvy2+5MDmYoix63LM/6NDbNtodCiGYGmFgO0dA==
+
 current-git-branch@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/current-git-branch/-/current-git-branch-1.1.0.tgz#3730e71ee024ed27dab16d740e5b1ea4774fa49f"
@@ -4227,7 +4295,7 @@ error-ex@^1.2.0, error-ex@^1.3.1:
   dependencies:
     is-arrayish "^0.2.1"
 
-error-stack-parser@^2.0.0:
+error-stack-parser@^2.0.0, error-stack-parser@^2.0.4:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/error-stack-parser/-/error-stack-parser-2.0.4.tgz#a757397dc5d9de973ac9a5d7d4e8ade7cfae9101"
   integrity sha512-fZ0KkoxSjLFmhW5lHbUT3tLwy3nX1qEzMYo8koY1vrsAco53CMT1djnBSeC/wUjTEZRhZl9iRw7PaMaxfJ4wzQ==
@@ -4852,6 +4920,11 @@ fast-url-parser@1.1.3:
   dependencies:
     punycode "^1.3.2"
 
+fastest-stable-stringify@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/fastest-stable-stringify/-/fastest-stable-stringify-1.0.1.tgz#9122d406d4c9d98bea644a6b6853d5874b87b028"
+  integrity sha1-kSLUBtTJ2YvqZEpraFPVh0uHsCg=
+
 fastparse@^1.1.1:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/fastparse/-/fastparse-1.1.2.tgz#91728c5a5942eced8531283c79441ee4122c35a9"
@@ -5817,6 +5890,11 @@ husky@^3.1.0:
     run-node "^1.0.0"
     slash "^3.0.0"
 
+hyphenate-style-name@^1.0.2:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/hyphenate-style-name/-/hyphenate-style-name-1.0.3.tgz#097bb7fa0b8f1a9cf0bd5c734cf95899981a9b48"
+  integrity sha512-EcuixamT82oplpoJ2XU4pDtKGWQ7b00CD9f1ug9IaQ3p1bkHMiKCZ9ut9QDI6qsa6cpUuB+A/I+zLtdNK4n2DQ==
+
 iconv-lite@0.4.24, iconv-lite@^0.4.24, iconv-lite@^0.4.4, iconv-lite@~0.4.13:
   version "0.4.24"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.24.tgz#2022b4b25fbddc21d2f524974a474aafe733908b"
@@ -5982,6 +6060,14 @@ init-package-json@^1.10.3:
     validate-npm-package-license "^3.0.1"
     validate-npm-package-name "^3.0.0"
 
+inline-style-prefixer@^4.0.0:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/inline-style-prefixer/-/inline-style-prefixer-4.0.2.tgz#d390957d26f281255fe101da863158ac6eb60911"
+  integrity sha512-N8nVhwfYga9MiV9jWlwfdj1UDIaZlBFu4cJSJkIr7tZX7sHpHhGR5su1qdpW+7KPL8ISTvCIkcaFi/JdBknvPg==
+  dependencies:
+    bowser "^1.7.3"
+    css-in-js-utils "^2.0.0"
+
 inquirer@6.5.0:
   version "6.5.0"
   resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-6.5.0.tgz#2303317efc9a4ea7ec2e2df6f86569b734accf42"
@@ -7794,6 +7880,11 @@ md5.js@^1.3.4:
     inherits "^2.0.1"
     safe-buffer "^5.1.2"
 
+mdn-data@2.0.6:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/mdn-data/-/mdn-data-2.0.6.tgz#852dc60fcaa5daa2e8cf6c9189c440ed3e042978"
+  integrity sha512-rQvjv71olwNHgiTbfPZFkJtjNMciWgswYeciZhtvWLO8bmX3TnhyA62I6sTWOyZssWHJJjY6/KiWwqQsWWsqOA==
+
 meant@~1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/meant/-/meant-1.0.1.tgz#66044fea2f23230ec806fb515efea29c44d2115d"
@@ -8129,6 +8220,20 @@ nan@^2.12.1:
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.14.0.tgz#7818f722027b2459a86f0295d434d1fc2336c52c"
   integrity sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg==
 
+nano-css@^5.2.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/nano-css/-/nano-css-5.2.1.tgz#73b8470fa40b028a134d3393ae36bbb34b9fa332"
+  integrity sha512-T54okxMAha0+de+W8o3qFtuWhTxYvqQh2ku1cYEqTTP9mR62nWV2lLK9qRuAGWmoaYWhU7K4evT9Lc1iF65wuw==
+  dependencies:
+    css-tree "^1.0.0-alpha.28"
+    csstype "^2.5.5"
+    fastest-stable-stringify "^1.0.1"
+    inline-style-prefixer "^4.0.0"
+    rtl-css-js "^1.9.0"
+    sourcemap-codec "^1.4.1"
+    stacktrace-js "^2.0.0"
+    stylis "3.5.0"
+
 nanomatch@^1.2.9:
   version "1.2.13"
   resolved "https://registry.yarnpkg.com/nanomatch/-/nanomatch-1.2.13.tgz#b87a8aa4fc0de8fe6be88895b38983ff265bd119"
@@ -9719,11 +9824,32 @@ react-dom@^16.12.0:
     prop-types "^15.6.2"
     scheduler "^0.18.0"
 
+react-fast-compare@^2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/react-fast-compare/-/react-fast-compare-2.0.4.tgz#e84b4d455b0fec113e0402c329352715196f81f9"
+  integrity sha512-suNP+J1VU1MWFKcyt7RtjiSWUjvidmQSlqu+eHslq+342xCbGTYmC0mEhPCOHxlW0CywylOC1u2DFAT+bv4dBw==
+
 react-is@^16.8.1, react-is@^16.8.4:
   version "16.12.0"
   resolved "https://registry.yarnpkg.com/react-is/-/react-is-16.12.0.tgz#2cc0fe0fba742d97fd527c42a13bec4eeb06241c"
   integrity sha512-rPCkf/mWBtKc97aLL9/txD8DZdemK0vkA3JMLShjlJB3Pj3s+lpf1KaBzMfQrAmhMQB0n1cU/SUGgKKBCe837Q==
 
+react-use@^13.12.2:
+  version "13.12.2"
+  resolved "https://registry.yarnpkg.com/react-use/-/react-use-13.12.2.tgz#89343a7769ed4b84f102bb371146a13ba2caae07"
+  integrity sha512-+I5kYjfsU7jel64wYa0nC7w/evhjL9fzmhEwOInB3HtrMt4Wt3jr6UYSVJExUTWEBUKSbmhyFAsR6jHvVj3vUw==
+  dependencies:
+    "@xobotyi/scrollbar-width" "1.5.0"
+    copy-to-clipboard "^3.2.0"
+    nano-css "^5.2.1"
+    react-fast-compare "^2.0.4"
+    resize-observer-polyfill "^1.5.1"
+    screenfull "^5.0.0"
+    set-harmonic-interval "^1.0.1"
+    throttle-debounce "^2.1.0"
+    ts-easing "^0.2.0"
+    tslib "^1.10.0"
+
 react@^16.12.0:
   version "16.12.0"
   resolved "https://registry.yarnpkg.com/react/-/react-16.12.0.tgz#0c0a9c6a142429e3614834d5a778e18aa78a0b83"
@@ -10169,6 +10295,11 @@ requires-port@^1.0.0:
   resolved "https://registry.yarnpkg.com/requires-port/-/requires-port-1.0.0.tgz#925d2601d39ac485e091cf0da5c6e694dc3dcaff"
   integrity sha1-kl0mAdOaxIXgkc8NpcbmlNw9yv8=
 
+resize-observer-polyfill@^1.5.1:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/resize-observer-polyfill/-/resize-observer-polyfill-1.5.1.tgz#0e9020dd3d21024458d4ebd27e23e40269810464"
+  integrity sha512-LwZrotdHOo12nQuZlHEmtuXdqGoOD0OhaxopaNFxWzInpEgaLWoVuAMbTzixuosCx2nEG58ngzW3vxdWoxIgdg==
+
 resolve-cwd@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/resolve-cwd/-/resolve-cwd-2.0.0.tgz#00a9f7387556e27038eae232caa372a6a59b665a"
@@ -10324,6 +10455,13 @@ rsvp@^4.8.4:
   resolved "https://registry.yarnpkg.com/rsvp/-/rsvp-4.8.5.tgz#c8f155311d167f68f21e168df71ec5b083113734"
   integrity sha512-nfMOlASu9OnRJo1mbEk2cz0D56a1MBNrJ7orjRZQG10XDyuvwksKbuXNp6qa+kbn839HwjwhBzhFmdsaEAfauA==
 
+rtl-css-js@^1.9.0:
+  version "1.14.0"
+  resolved "https://registry.yarnpkg.com/rtl-css-js/-/rtl-css-js-1.14.0.tgz#daa4f192a92509e292a0519f4b255e6e3c076b7d"
+  integrity sha512-Dl5xDTeN3e7scU1cWX8c9b6/Nqz3u/HgR4gePc1kWXYiQWVQbKCEyK6+Hxve9LbcJ5EieHy1J9nJCN3grTtGwg==
+  dependencies:
+    "@babel/runtime" "^7.1.2"
+
 run-async@^2.2.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/run-async/-/run-async-2.3.0.tgz#0371ab4ae0bdd720d4166d7dfda64ff7a445a6c0"
@@ -10445,6 +10583,11 @@ scope-eval@^1.0.0:
   resolved "https://registry.yarnpkg.com/scope-eval/-/scope-eval-1.0.0.tgz#e182db1a1ef26f3e79d4bf48423b25e22839f0ff"
   integrity sha1-4YLbGh7ybz551L9IQjsl4ig58P8=
 
+screenfull@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/screenfull/-/screenfull-5.0.0.tgz#5c2010c0e84fd4157bf852877698f90b8cbe96f6"
+  integrity sha512-yShzhaIoE9OtOhWVyBBffA6V98CDCoyHTsp8228blmqYy1Z5bddzE/4FPiJKlr8DVR4VBiiUyfPzIQPIYDkeMA==
+
 select-hose@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/select-hose/-/select-hose-2.0.0.tgz#625d8658f865af43ec962bfc376a37359a4994ca"
@@ -10611,6 +10754,11 @@ set-blocking@^2.0.0, set-blocking@~2.0.0:
   resolved "https://registry.yarnpkg.com/set-blocking/-/set-blocking-2.0.0.tgz#045f9782d011ae9a6803ddd382b24392b3d890f7"
   integrity sha1-BF+XgtARrppoA93TgrJDkrPYkPc=
 
+set-harmonic-interval@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/set-harmonic-interval/-/set-harmonic-interval-1.0.1.tgz#e1773705539cdfb80ce1c3d99e7f298bb3995249"
+  integrity sha512-AhICkFV84tBP1aWqPwLZqFvAwqEoVA9kxNMniGEUvzOlm4vLmOFLiTT3UZ6bziJTy4bOVpzWGTfSCbmaayGx8g==
+
 set-value@^2.0.0, set-value@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/set-value/-/set-value-2.0.1.tgz#a18d40530e6f07de4228c7defe4227af8cad005b"
@@ -10865,6 +11013,11 @@ source-map-url@^0.4.0:
   resolved "https://registry.yarnpkg.com/source-map-url/-/source-map-url-0.4.0.tgz#3e935d7ddd73631b97659956d55128e87b5084a3"
   integrity sha1-PpNdfd1zYxuXZZlW1VEo6HtQhKM=
 
+source-map@0.5.6:
+  version "0.5.6"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.6.tgz#75ce38f52bf0733c5a7f0c118d81334a2bb5f412"
+  integrity sha1-dc449SvwczxafwwRjYEzSiu19BI=
+
 source-map@^0.5.0, source-map@^0.5.6:
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
@@ -10875,7 +11028,7 @@ source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.0, source-map@~0.6.1:
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
   integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
 
-sourcemap-codec@^1.4.4:
+sourcemap-codec@^1.4.1, sourcemap-codec@^1.4.4:
   version "1.4.6"
   resolved "https://registry.yarnpkg.com/sourcemap-codec/-/sourcemap-codec-1.4.6.tgz#e30a74f0402bad09807640d39e971090a08ce1e9"
   integrity sha512-1ZooVLYFxC448piVLBbtOxFcXwnymH9oUF8nRd3CuYDVvkRBxRl6pB4Mtas5a4drtL+E8LDgFkQNcgIw6tc8Hg==
@@ -11001,6 +11154,13 @@ ssri@^6.0.0, ssri@^6.0.1:
   dependencies:
     figgy-pudding "^3.5.1"
 
+stack-generator@^2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/stack-generator/-/stack-generator-2.0.4.tgz#027513eab2b195bbb43b9c8360ba2dd0ab54de09"
+  integrity sha512-ha1gosTNcgxwzo9uKTQ8zZ49aUp5FIUW58YHFxCqaAHtE0XqBg0chGFYA1MfmW//x1KWq3F4G7Ug7bJh4RiRtg==
+  dependencies:
+    stackframe "^1.1.0"
+
 stack-utils@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/stack-utils/-/stack-utils-1.0.2.tgz#33eba3897788558bebfc2db059dc158ec36cebb8"
@@ -11011,6 +11171,23 @@ stackframe@^1.1.0:
   resolved "https://registry.yarnpkg.com/stackframe/-/stackframe-1.1.0.tgz#e3fc2eb912259479c9822f7d1f1ff365bd5cbc83"
   integrity sha512-Vx6W1Yvy+AM1R/ckVwcHQHV147pTPBKWCRLrXMuPrFVfvBUc3os7PR1QLIWCMhPpRg5eX9ojzbQIMLGBwyLjqg==
 
+stacktrace-gps@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/stacktrace-gps/-/stacktrace-gps-3.0.3.tgz#b89f84cc13bb925b96607e737b617c8715facf57"
+  integrity sha512-51Rr7dXkyFUKNmhY/vqZWK+EvdsfFSRiQVtgHTFlAdNIYaDD7bVh21yBHXaNWAvTD+w+QSjxHg7/v6Tz4veExA==
+  dependencies:
+    source-map "0.5.6"
+    stackframe "^1.1.0"
+
+stacktrace-js@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/stacktrace-js/-/stacktrace-js-2.0.1.tgz#ebdb0e9a16e6f171f96ca7878404e7f15c3d42ba"
+  integrity sha512-13oDNgBSeWtdGa4/2BycNyKqe+VktCoJ8VLx4pDoJkwGGJVtiHdfMOAj3aW9xTi8oR2v34z9IcvfCvT6XNdNAw==
+  dependencies:
+    error-stack-parser "^2.0.4"
+    stack-generator "^2.0.4"
+    stacktrace-gps "^3.0.3"
+
 start-server-and-test@^1.10.6:
   version "1.10.6"
   resolved "https://registry.yarnpkg.com/start-server-and-test/-/start-server-and-test-1.10.6.tgz#43355173e49a165b0ce9e928733b574bb877379c"
@@ -11278,6 +11455,11 @@ style-loader@^1.0.1:
     loader-utils "^1.2.3"
     schema-utils "^2.0.1"
 
+stylis@3.5.0:
+  version "3.5.0"
+  resolved "https://registry.yarnpkg.com/stylis/-/stylis-3.5.0.tgz#016fa239663d77f868fef5b67cf201c4b7c701e1"
+  integrity sha512-pP7yXN6dwMzAR29Q0mBrabPCe0/mNO1MSr93bhay+hcZondvMMTpeGyd8nbhYJdyperNT2DRxONQuUGcJr5iPw==
+
 supports-color@5.5.0, supports-color@^5.0.0, supports-color@^5.3.0, supports-color@^5.4.0:
   version "5.5.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.5.0.tgz#e2e69a44ac8772f78a1ec0b35b689df6530efc8f"
@@ -11432,6 +11614,11 @@ throat@^4.0.0:
   resolved "https://registry.yarnpkg.com/throat/-/throat-4.1.0.tgz#89037cbc92c56ab18926e6ba4cbb200e15672a6a"
   integrity sha1-iQN8vJLFarGJJua6TLsgDhVnKmo=
 
+throttle-debounce@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/throttle-debounce/-/throttle-debounce-2.1.0.tgz#257e648f0a56bd9e54fe0f132c4ab8611df4e1d5"
+  integrity sha512-AOvyNahXQuU7NN+VVvOOX+uW6FPaWdAOdRP5HfwYxAfCzXTFKRMoIMk+n+po318+ktcChx+F1Dd91G3YHeMKyg==
+
 throttleit@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/throttleit/-/throttleit-1.0.0.tgz#9e785836daf46743145a5984b6268d828528ac6c"
@@ -11539,6 +11726,11 @@ to-regex@^3.0.1, to-regex@^3.0.2:
     regex-not "^1.0.2"
     safe-regex "^1.1.0"
 
+toggle-selection@^1.0.6:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/toggle-selection/-/toggle-selection-1.0.6.tgz#6e45b1263f2017fa0acc7d89d78b15b8bf77da32"
+  integrity sha1-bkWxJj8gF/oKzH2J14sVuL932jI=
+
 toidentifier@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/toidentifier/-/toidentifier-1.0.0.tgz#7e1be3470f1e77948bc43d94a3c8f4d7752ba553"
@@ -11582,7 +11774,12 @@ trim-off-newlines@^1.0.0:
   resolved "https://registry.yarnpkg.com/trim-off-newlines/-/trim-off-newlines-1.0.1.tgz#9f9ba9d9efa8764c387698bcbfeb2c848f11adb3"
   integrity sha1-n5up2e+odkw4dpi8v+sshI8RrbM=
 
-tslib@^1.8.1, tslib@^1.9.0:
+ts-easing@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/ts-easing/-/ts-easing-0.2.0.tgz#c8a8a35025105566588d87dbda05dd7fbfa5a4ec"
+  integrity sha512-Z86EW+fFFh/IFB1fqQ3/+7Zpf9t2ebOAxNI/V6Wo7r5gqiqtxmgTlQ1qbqQcjLKYeSHPTsEmvlJUDg/EuL0uHQ==
+
+tslib@^1.10.0, tslib@^1.8.1, tslib@^1.9.0:
   version "1.10.0"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.10.0.tgz#c3c19f95973fb0a62973fb09d90d961ee43e5c8a"
   integrity sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==