From eccb17495aeb413c1c19644bbb4a17d294012dfd Mon Sep 17 00:00:00 2001
From: Lucas Azzola <derflatulator@gmail.com>
Date: Sun, 18 Jun 2017 20:25:27 +1000
Subject: [PATCH] Website: speed up load time, enable service worker (#2172)

* feat(website): speed up website load :boom:

* chore(package): fix bad merge
---
 docs/icon.png                    | Bin 0 -> 4581 bytes
 docs/index.html                  |  95 +++++++++++++++++++++++--------
 docs/lib/sw-toolbox-companion.js |  23 ++++++++
 docs/lib/sw-toolbox.js           |  16 ++++++
 docs/manifest.json               |  15 +++++
 docs/playground.js               |  85 +++++++++++++++------------
 docs/prettier.png                | Bin 0 -> 17142 bytes
 docs/service-worker.js           |  36 ++++++++++++
 docs/worker.js                   |  32 +++++++++--
 package.json                     |   1 +
 scripts/build/build.sh           |   4 ++
 yarn.lock                        |  21 +++++++
 12 files changed, 261 insertions(+), 67 deletions(-)
 create mode 100644 docs/icon.png
 create mode 100644 docs/lib/sw-toolbox-companion.js
 create mode 100644 docs/lib/sw-toolbox.js
 create mode 100644 docs/manifest.json
 create mode 100644 docs/prettier.png
 create mode 100644 docs/service-worker.js

diff --git a/docs/icon.png b/docs/icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..47a2f82eb290c702d2948a334c2c43dc01c0b414
GIT binary patch
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diff --git a/docs/index.html b/docs/index.html
index 0b0fbc5ff..062c5a01b 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -2,21 +2,39 @@
 <html>
 <head>
   <meta charset="utf-8">
-  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
   <title>Prettier</title>
 
-  <!-- CodeMirror -->
-  <link rel="stylesheet" href="https://codemirror.net/lib/codemirror.css">
-  <link rel="stylesheet" href="https://codemirror.net/theme/neat.css">
-  <script src="https://codemirror.net/lib/codemirror.js"></script>
-  <script src="https://codemirror.net/mode/javascript/javascript.js"></script>
-  <script src="https://codemirror.net/addon/display/rulers.js"></script>
-  <script src="https://codemirror.net/addon/search/searchcursor.js"></script>
-  <script src="https://codemirror.net/addon/edit/matchbrackets.js"></script>
-  <script src="https://codemirror.net/addon/edit/closebrackets.js"></script>
-  <script src="https://codemirror.net/addon/comment/comment.js"></script>
-  <script src="https://codemirror.net/addon/wrap/hardwrap.js"></script>
-  <script src="https://codemirror.net/keymap/sublime.js"></script>
+  <link rel="manifest" href="manifest.json">
+
+  <meta name="mobile-web-app-capable" content="yes">
+  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="application-name" content="Prettier">
+  <meta name="apple-mobile-web-app-title" content="Prettier">
+  <meta name="theme-color" content="#1A2B34">
+  <meta name="msapplication-navbutton-color" content="#1A2B34">
+  <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
+  <meta name="msapplication-starturl" content="/prettier/">
+  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+
+  <link rel="icon" href="icon.png">
+  <link rel="apple-touch-icon" href="icon.png">
+
+  <link rel="stylesheet" crossorigin  href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/codemirror.css">
+  <link rel="stylesheet" crossorigin  href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/theme/neat.css">
+
+  <script src="lib/prettier-version.js"></script>
+  <script src="playground.js"></script>
+
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/codemirror.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/mode/javascript/javascript.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/addon/display/rulers.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/addon/search/searchcursor.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/addon/edit/matchbrackets.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/addon/edit/closebrackets.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/addon/comment/comment.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/addon/wrap/hardwrap.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/keymap/sublime.js"></script>
 
   <style type="text/css">
     html,
@@ -36,7 +54,7 @@
     }
 
     .options-summary {
-      font-size: 1.2em;
+      font-size: 1.4em;
       margin-top: 8px;
       text-align: center;
     }
@@ -68,7 +86,9 @@
     }
 
     .logo {
-      height: 100px;
+      height: 45px;
+      margin-left: 10px;
+      margin-right: 20px;
     }
 
     .tagline {
@@ -81,6 +101,10 @@
       margin-right: 30px;
     }
 
+    textarea.loading {
+      opacity: 0;
+    }
+
     .editors-container {
       display: flex;
       flex-grow: 1;
@@ -93,13 +117,27 @@
     }
 
     .editor {
-      min-width: 400px;
       display: flex;
       flex: 1;
+      flex-basis: 100%;
       position: relative;
       border-top: 1px solid #1A2B34;
     }
 
+    /* display as 2x2 grid */
+    @media (min-width: 800px) {
+      .editor {
+        flex-basis: 50%;
+      }
+    }
+
+    /* display as four columns */
+    @media (min-width: 1200px) {
+      .editor {
+        flex-basis: 25%;
+      }
+    }
+
     .arrow {
       align-self: center;
       font-size: 1.2em;
@@ -139,10 +177,16 @@
       margin: 0 10px;
     }
 
-    @media (max-width: 400px) {
+    @media (max-width: 408px) {
       label {
         padding: 8px;
       }
+      .options-container {
+        flex-direction: column-reverse;
+      }
+      .options.last {
+        flex-direction: column-reverse;
+      }
     }
 
     input[type="number"] {
@@ -158,7 +202,7 @@
 <body>
   <header>
     <a href=".">
-      <img class="logo" src="https://cloud.githubusercontent.com/assets/311752/24730511/e6690c38-1a18-11e7-95a9-2af91bb60440.png">
+      <img class="logo" src="prettier.png">
     </a>
     <h2 class="tagline"><em>Opinionated</em> code formatter</h2>
     <span class="links">
@@ -175,13 +219,16 @@
   <section class="editors-container">
     <div class="editors">
       <div class="editor input">
-        <textarea id="input-editor"></textarea>
+        <textarea class="loading" id="input-editor"></textarea>
+      </div>
+      <div class="editor ast">
+        <textarea class="loading" id="ast-editor"></textarea>
       </div>
       <div class="editor doc">
-        <textarea id="doc-editor"></textarea>
+        <textarea class="loading" id="doc-editor"></textarea>
       </div>
       <div class="editor output">
-        <textarea id="output-editor"></textarea>
+        <textarea class="loading" id="output-editor"></textarea>
       </div>
     </div>
   </section>
@@ -202,10 +249,11 @@
           <label><input type="checkbox" data-inverted id="bracketSpacing"></input> --no-bracket-spacing</label>
           <label><input type="checkbox" id="jsxBracketSameLine"></input> --jsx-bracket-same-line</label>
         </div>
-        <div class="options">
+        <div class="options last">
           <label>--trailing-comma <select id="trailingComma"><option value="none">none</option><option value="es5">es5</option><option value="all">all</option></select></label>
           <label>--parser <select id="parser"><option value="babylon">babylon</option><option value="flow">flow</option><option value="typescript">typescript</option><option value="postcss">postcss</option></select></label>
           <span style="flex: 0.3"></span>
+          <label><input type="checkbox" id="ast"></input> show AST (debug)</label>
           <label><input type="checkbox" id="doc"></input> show doc (debug)</label>
         </div>
       </div>
@@ -222,8 +270,7 @@
     </p>
   </footer>
 
-  <script src="lib/prettier-version.js"></script>
-  <script src="playground.js"></script>
+  <script src="lib/sw-toolbox-companion.js" data-service-worker="service-worker.js"></script>
 
   <script async defer src="https://buttons.github.io/buttons.js"></script>
 </body>
diff --git a/docs/lib/sw-toolbox-companion.js b/docs/lib/sw-toolbox-companion.js
new file mode 100644
index 000000000..a332ecc3e
--- /dev/null
+++ b/docs/lib/sw-toolbox-companion.js
@@ -0,0 +1,23 @@
+/*
+	Copyright 2016 Google Inc. All Rights Reserved.
+
+	Licensed under the Apache License, Version 2.0 (the "License");
+	you may not use this file except in compliance with the License.
+	You may obtain a copy of the License at
+
+	    http://www.apache.org/licenses/LICENSE-2.0
+
+	Unless required by applicable law or agreed to in writing, software
+	distributed under the License is distributed on an "AS IS" BASIS,
+	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+	See the License for the specific language governing permissions and
+	limitations under the License.
+*/
+(function() {
+  'use strict';
+  var workerScript = document.currentScript && document.currentScript.dataset.serviceWorker;
+
+  if (workerScript && 'serviceWorker' in navigator) {
+    navigator.serviceWorker.register(workerScript);
+  }
+})();
diff --git a/docs/lib/sw-toolbox.js b/docs/lib/sw-toolbox.js
new file mode 100644
index 000000000..08f8d9269
--- /dev/null
+++ b/docs/lib/sw-toolbox.js
@@ -0,0 +1,16 @@
+/* 
+ Copyright 2016 Google Inc. All Rights Reserved.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var t;t="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this,t.toolbox=e()}}(function(){return function e(t,n,r){function o(c,s){if(!n[c]){if(!t[c]){var a="function"==typeof require&&require;if(!s&&a)return a(c,!0);if(i)return i(c,!0);var u=new Error("Cannot find module '"+c+"'");throw u.code="MODULE_NOT_FOUND",u}var f=n[c]={exports:{}};t[c][0].call(f.exports,function(e){var n=t[c][1][e];return o(n?n:e)},f,f.exports,e,t,n,r)}return n[c].exports}for(var i="function"==typeof require&&require,c=0;c<r.length;c++)o(r[c]);return o}({1:[function(e,t,n){"use strict";function r(e,t){t=t||{};var n=t.debug||m.debug;n&&console.log("[sw-toolbox] "+e)}function o(e){var t;return e&&e.cache&&(t=e.cache.name),t=t||m.cache.name,caches.open(t)}function i(e,t){t=t||{};var n=t.successResponses||m.successResponses;return fetch(e.clone()).then(function(r){return"GET"===e.method&&n.test(r.status)&&o(t).then(function(n){n.put(e,r).then(function(){var r=t.cache||m.cache;(r.maxEntries||r.maxAgeSeconds)&&r.name&&c(e,n,r)})}),r.clone()})}function c(e,t,n){var r=s.bind(null,e,t,n);d=d?d.then(r):r()}function s(e,t,n){var o=e.url,i=n.maxAgeSeconds,c=n.maxEntries,s=n.name,a=Date.now();return r("Updating LRU order for "+o+". Max entries is "+c+", max age is "+i),g.getDb(s).then(function(e){return g.setTimestampForUrl(e,o,a)}).then(function(e){return g.expireEntries(e,c,i,a)}).then(function(e){r("Successfully updated IDB.");var n=e.map(function(e){return t.delete(e)});return Promise.all(n).then(function(){r("Done with cache cleanup.")})}).catch(function(e){r(e)})}function a(e,t,n){return r("Renaming cache: ["+e+"] to ["+t+"]",n),caches.delete(t).then(function(){return Promise.all([caches.open(e),caches.open(t)]).then(function(t){var n=t[0],r=t[1];return n.keys().then(function(e){return Promise.all(e.map(function(e){return n.match(e).then(function(t){return r.put(e,t)})}))}).then(function(){return caches.delete(e)})})})}function u(e,t){return o(t).then(function(t){return t.add(e)})}function f(e,t){return o(t).then(function(t){return t.delete(e)})}function h(e){e instanceof Promise||p(e),m.preCacheItems=m.preCacheItems.concat(e)}function p(e){var t=Array.isArray(e);if(t&&e.forEach(function(e){"string"==typeof e||e instanceof Request||(t=!1)}),!t)throw new TypeError("The precache method expects either an array of strings and/or Requests or a Promise that resolves to an array of strings and/or Requests.");return e}function l(e,t,n){if(!e)return!1;if(t){var r=e.headers.get("date");if(r){var o=new Date(r);if(o.getTime()+1e3*t<n)return!1}}return!0}var d,m=e("./options"),g=e("./idb-cache-expiration");t.exports={debug:r,fetchAndCache:i,openCache:o,renameCache:a,cache:u,uncache:f,precache:h,validatePrecacheInput:p,isResponseFresh:l}},{"./idb-cache-expiration":2,"./options":4}],2:[function(e,t,n){"use strict";function r(e){return new Promise(function(t,n){var r=indexedDB.open(u+e,f);r.onupgradeneeded=function(){var e=r.result.createObjectStore(h,{keyPath:p});e.createIndex(l,l,{unique:!1})},r.onsuccess=function(){t(r.result)},r.onerror=function(){n(r.error)}})}function o(e){return e in d||(d[e]=r(e)),d[e]}function i(e,t,n){return new Promise(function(r,o){var i=e.transaction(h,"readwrite"),c=i.objectStore(h);c.put({url:t,timestamp:n}),i.oncomplete=function(){r(e)},i.onabort=function(){o(i.error)}})}function c(e,t,n){return t?new Promise(function(r,o){var i=1e3*t,c=[],s=e.transaction(h,"readwrite"),a=s.objectStore(h),u=a.index(l);u.openCursor().onsuccess=function(e){var t=e.target.result;if(t&&n-i>t.value[l]){var r=t.value[p];c.push(r),a.delete(r),t.continue()}},s.oncomplete=function(){r(c)},s.onabort=o}):Promise.resolve([])}function s(e,t){return t?new Promise(function(n,r){var o=[],i=e.transaction(h,"readwrite"),c=i.objectStore(h),s=c.index(l),a=s.count();s.count().onsuccess=function(){var e=a.result;e>t&&(s.openCursor().onsuccess=function(n){var r=n.target.result;if(r){var i=r.value[p];o.push(i),c.delete(i),e-o.length>t&&r.continue()}})},i.oncomplete=function(){n(o)},i.onabort=r}):Promise.resolve([])}function a(e,t,n,r){return c(e,n,r).then(function(n){return s(e,t).then(function(e){return n.concat(e)})})}var u="sw-toolbox-",f=1,h="store",p="url",l="timestamp",d={};t.exports={getDb:o,setTimestampForUrl:i,expireEntries:a}},{}],3:[function(e,t,n){"use strict";function r(e){var t=a.match(e.request);t?e.respondWith(t(e.request)):a.default&&"GET"===e.request.method&&0===e.request.url.indexOf("http")&&e.respondWith(a.default(e.request))}function o(e){s.debug("activate event fired");var t=u.cache.name+"$$$inactive$$$";e.waitUntil(s.renameCache(t,u.cache.name))}function i(e){return e.reduce(function(e,t){return e.concat(t)},[])}function c(e){var t=u.cache.name+"$$$inactive$$$";s.debug("install event fired"),s.debug("creating cache ["+t+"]"),e.waitUntil(s.openCache({cache:{name:t}}).then(function(e){return Promise.all(u.preCacheItems).then(i).then(s.validatePrecacheInput).then(function(t){return s.debug("preCache list: "+(t.join(", ")||"(none)")),e.addAll(t)})}))}e("serviceworker-cache-polyfill");var s=e("./helpers"),a=e("./router"),u=e("./options");t.exports={fetchListener:r,activateListener:o,installListener:c}},{"./helpers":1,"./options":4,"./router":6,"serviceworker-cache-polyfill":16}],4:[function(e,t,n){"use strict";var r;r=self.registration?self.registration.scope:self.scope||new URL("./",self.location).href,t.exports={cache:{name:"$$$toolbox-cache$$$"+r+"$$$",maxAgeSeconds:null,maxEntries:null},debug:!1,networkTimeoutSeconds:null,preCacheItems:[],successResponses:/^0|([123]\d\d)|(40[14567])|410$/}},{}],5:[function(e,t,n){"use strict";var r=new URL("./",self.location),o=r.pathname,i=e("path-to-regexp"),c=function(e,t,n,r){t instanceof RegExp?this.fullUrlRegExp=t:(0!==t.indexOf("/")&&(t=o+t),this.keys=[],this.regexp=i(t,this.keys)),this.method=e,this.options=r,this.handler=n};c.prototype.makeHandler=function(e){var t;if(this.regexp){var n=this.regexp.exec(e);t={},this.keys.forEach(function(e,r){t[e.name]=n[r+1]})}return function(e){return this.handler(e,t,this.options)}.bind(this)},t.exports=c},{"path-to-regexp":15}],6:[function(e,t,n){"use strict";function r(e){return e.replace(/[-\/\\^$*+?.()|[\]{}]/g,"\\$&")}var o=e("./route"),i=e("./helpers"),c=function(e,t){for(var n=e.entries(),r=n.next(),o=[];!r.done;){var i=new RegExp(r.value[0]);i.test(t)&&o.push(r.value[1]),r=n.next()}return o},s=function(){this.routes=new Map,this.routes.set(RegExp,new Map),this.default=null};["get","post","put","delete","head","any"].forEach(function(e){s.prototype[e]=function(t,n,r){return this.add(e,t,n,r)}}),s.prototype.add=function(e,t,n,c){c=c||{};var s;t instanceof RegExp?s=RegExp:(s=c.origin||self.location.origin,s=s instanceof RegExp?s.source:r(s)),e=e.toLowerCase();var a=new o(e,t,n,c);this.routes.has(s)||this.routes.set(s,new Map);var u=this.routes.get(s);u.has(e)||u.set(e,new Map);var f=u.get(e),h=a.regexp||a.fullUrlRegExp;f.has(h.source)&&i.debug('"'+t+'" resolves to same regex as existing route.'),f.set(h.source,a)},s.prototype.matchMethod=function(e,t){var n=new URL(t),r=n.origin,o=n.pathname;return this._match(e,c(this.routes,r),o)||this._match(e,[this.routes.get(RegExp)],t)},s.prototype._match=function(e,t,n){if(0===t.length)return null;for(var r=0;r<t.length;r++){var o=t[r],i=o&&o.get(e.toLowerCase());if(i){var s=c(i,n);if(s.length>0)return s[0].makeHandler(n)}}return null},s.prototype.match=function(e){return this.matchMethod(e.method,e.url)||this.matchMethod("any",e.url)},t.exports=new s},{"./helpers":1,"./route":5}],7:[function(e,t,n){"use strict";function r(e,t,n){return n=n||{},i.debug("Strategy: cache first ["+e.url+"]",n),i.openCache(n).then(function(t){return t.match(e).then(function(t){var r=n.cache||o.cache,c=Date.now();return i.isResponseFresh(t,r.maxAgeSeconds,c)?t:i.fetchAndCache(e,n)})})}var o=e("../options"),i=e("../helpers");t.exports=r},{"../helpers":1,"../options":4}],8:[function(e,t,n){"use strict";function r(e,t,n){return n=n||{},i.debug("Strategy: cache only ["+e.url+"]",n),i.openCache(n).then(function(t){return t.match(e).then(function(e){var t=n.cache||o.cache,r=Date.now();if(i.isResponseFresh(e,t.maxAgeSeconds,r))return e})})}var o=e("../options"),i=e("../helpers");t.exports=r},{"../helpers":1,"../options":4}],9:[function(e,t,n){"use strict";function r(e,t,n){return o.debug("Strategy: fastest ["+e.url+"]",n),new Promise(function(r,c){var s=!1,a=[],u=function(e){a.push(e.toString()),s?c(new Error('Both cache and network failed: "'+a.join('", "')+'"')):s=!0},f=function(e){e instanceof Response?r(e):u("No result returned")};o.fetchAndCache(e.clone(),n).then(f,u),i(e,t,n).then(f,u)})}var o=e("../helpers"),i=e("./cacheOnly");t.exports=r},{"../helpers":1,"./cacheOnly":8}],10:[function(e,t,n){t.exports={networkOnly:e("./networkOnly"),networkFirst:e("./networkFirst"),cacheOnly:e("./cacheOnly"),cacheFirst:e("./cacheFirst"),fastest:e("./fastest")}},{"./cacheFirst":7,"./cacheOnly":8,"./fastest":9,"./networkFirst":11,"./networkOnly":12}],11:[function(e,t,n){"use strict";function r(e,t,n){n=n||{};var r=n.successResponses||o.successResponses,c=n.networkTimeoutSeconds||o.networkTimeoutSeconds;return i.debug("Strategy: network first ["+e.url+"]",n),i.openCache(n).then(function(t){var s,a,u=[];if(c){var f=new Promise(function(r){s=setTimeout(function(){t.match(e).then(function(e){var t=n.cache||o.cache,c=Date.now(),s=t.maxAgeSeconds;i.isResponseFresh(e,s,c)&&r(e)})},1e3*c)});u.push(f)}var h=i.fetchAndCache(e,n).then(function(e){if(s&&clearTimeout(s),r.test(e.status))return e;throw i.debug("Response was an HTTP error: "+e.statusText,n),a=e,new Error("Bad response")}).catch(function(r){return i.debug("Network or response error, fallback to cache ["+e.url+"]",n),t.match(e).then(function(e){if(e)return e;if(a)return a;throw r})});return u.push(h),Promise.race(u)})}var o=e("../options"),i=e("../helpers");t.exports=r},{"../helpers":1,"../options":4}],12:[function(e,t,n){"use strict";function r(e,t,n){return o.debug("Strategy: network only ["+e.url+"]",n),fetch(e)}var o=e("../helpers");t.exports=r},{"../helpers":1}],13:[function(e,t,n){"use strict";var r=e("./options"),o=e("./router"),i=e("./helpers"),c=e("./strategies"),s=e("./listeners");i.debug("Service Worker Toolbox is loading"),self.addEventListener("install",s.installListener),self.addEventListener("activate",s.activateListener),self.addEventListener("fetch",s.fetchListener),t.exports={networkOnly:c.networkOnly,networkFirst:c.networkFirst,cacheOnly:c.cacheOnly,cacheFirst:c.cacheFirst,fastest:c.fastest,router:o,options:r,cache:i.cache,uncache:i.uncache,precache:i.precache}},{"./helpers":1,"./listeners":3,"./options":4,"./router":6,"./strategies":10}],14:[function(e,t,n){t.exports=Array.isArray||function(e){return"[object Array]"==Object.prototype.toString.call(e)}},{}],15:[function(e,t,n){function r(e,t){for(var n,r=[],o=0,i=0,c="",s=t&&t.delimiter||"/";null!=(n=x.exec(e));){var f=n[0],h=n[1],p=n.index;if(c+=e.slice(i,p),i=p+f.length,h)c+=h[1];else{var l=e[i],d=n[2],m=n[3],g=n[4],v=n[5],w=n[6],y=n[7];c&&(r.push(c),c="");var b=null!=d&&null!=l&&l!==d,E="+"===w||"*"===w,R="?"===w||"*"===w,k=n[2]||s,$=g||v;r.push({name:m||o++,prefix:d||"",delimiter:k,optional:R,repeat:E,partial:b,asterisk:!!y,pattern:$?u($):y?".*":"[^"+a(k)+"]+?"})}}return i<e.length&&(c+=e.substr(i)),c&&r.push(c),r}function o(e,t){return s(r(e,t))}function i(e){return encodeURI(e).replace(/[\/?#]/g,function(e){return"%"+e.charCodeAt(0).toString(16).toUpperCase()})}function c(e){return encodeURI(e).replace(/[?#]/g,function(e){return"%"+e.charCodeAt(0).toString(16).toUpperCase()})}function s(e){for(var t=new Array(e.length),n=0;n<e.length;n++)"object"==typeof e[n]&&(t[n]=new RegExp("^(?:"+e[n].pattern+")$"));return function(n,r){for(var o="",s=n||{},a=r||{},u=a.pretty?i:encodeURIComponent,f=0;f<e.length;f++){var h=e[f];if("string"!=typeof h){var p,l=s[h.name];if(null==l){if(h.optional){h.partial&&(o+=h.prefix);continue}throw new TypeError('Expected "'+h.name+'" to be defined')}if(v(l)){if(!h.repeat)throw new TypeError('Expected "'+h.name+'" to not repeat, but received `'+JSON.stringify(l)+"`");if(0===l.length){if(h.optional)continue;throw new TypeError('Expected "'+h.name+'" to not be empty')}for(var d=0;d<l.length;d++){if(p=u(l[d]),!t[f].test(p))throw new TypeError('Expected all "'+h.name+'" to match "'+h.pattern+'", but received `'+JSON.stringify(p)+"`");o+=(0===d?h.prefix:h.delimiter)+p}}else{if(p=h.asterisk?c(l):u(l),!t[f].test(p))throw new TypeError('Expected "'+h.name+'" to match "'+h.pattern+'", but received "'+p+'"');o+=h.prefix+p}}else o+=h}return o}}function a(e){return e.replace(/([.+*?=^!:${}()[\]|\/\\])/g,"\\$1")}function u(e){return e.replace(/([=!:$\/()])/g,"\\$1")}function f(e,t){return e.keys=t,e}function h(e){return e.sensitive?"":"i"}function p(e,t){var n=e.source.match(/\((?!\?)/g);if(n)for(var r=0;r<n.length;r++)t.push({name:r,prefix:null,delimiter:null,optional:!1,repeat:!1,partial:!1,asterisk:!1,pattern:null});return f(e,t)}function l(e,t,n){for(var r=[],o=0;o<e.length;o++)r.push(g(e[o],t,n).source);var i=new RegExp("(?:"+r.join("|")+")",h(n));return f(i,t)}function d(e,t,n){return m(r(e,n),t,n)}function m(e,t,n){v(t)||(n=t||n,t=[]),n=n||{};for(var r=n.strict,o=n.end!==!1,i="",c=0;c<e.length;c++){var s=e[c];if("string"==typeof s)i+=a(s);else{var u=a(s.prefix),p="(?:"+s.pattern+")";t.push(s),s.repeat&&(p+="(?:"+u+p+")*"),p=s.optional?s.partial?u+"("+p+")?":"(?:"+u+"("+p+"))?":u+"("+p+")",i+=p}}var l=a(n.delimiter||"/"),d=i.slice(-l.length)===l;return r||(i=(d?i.slice(0,-l.length):i)+"(?:"+l+"(?=$))?"),i+=o?"$":r&&d?"":"(?="+l+"|$)",f(new RegExp("^"+i,h(n)),t)}function g(e,t,n){return v(t)||(n=t||n,t=[]),n=n||{},e instanceof RegExp?p(e,t):v(e)?l(e,t,n):d(e,t,n)}var v=e("isarray");t.exports=g,t.exports.parse=r,t.exports.compile=o,t.exports.tokensToFunction=s,t.exports.tokensToRegExp=m;var x=new RegExp(["(\\\\.)","([\\/.])?(?:(?:\\:(\\w+)(?:\\(((?:\\\\.|[^\\\\()])+)\\))?|\\(((?:\\\\.|[^\\\\()])+)\\))([+*?])?|(\\*))"].join("|"),"g")},{isarray:14}],16:[function(e,t,n){!function(){var e=Cache.prototype.addAll,t=navigator.userAgent.match(/(Firefox|Chrome)\/(\d+\.)/);if(t)var n=t[1],r=parseInt(t[2]);e&&(!t||"Firefox"===n&&r>=46||"Chrome"===n&&r>=50)||(Cache.prototype.addAll=function(e){function t(e){this.name="NetworkError",this.code=19,this.message=e}var n=this;return t.prototype=Object.create(Error.prototype),Promise.resolve().then(function(){if(arguments.length<1)throw new TypeError;return e=e.map(function(e){return e instanceof Request?e:String(e)}),Promise.all(e.map(function(e){"string"==typeof e&&(e=new Request(e));var n=new URL(e.url).protocol;if("http:"!==n&&"https:"!==n)throw new t("Invalid scheme");return fetch(e.clone())}))}).then(function(r){if(r.some(function(e){return!e.ok}))throw new t("Incorrect response status");return Promise.all(r.map(function(t,r){return n.put(e[r],t)}))}).then(function(){})},Cache.prototype.add=function(e){return this.addAll([e])})}()},{}]},{},[13])(13)});
+//# sourceMappingURL=sw-toolbox.js.map
diff --git a/docs/manifest.json b/docs/manifest.json
new file mode 100644
index 000000000..99ca46365
--- /dev/null
+++ b/docs/manifest.json
@@ -0,0 +1,15 @@
+{
+  "name": "Prettier",
+  "short_name": "Prettier",
+  "description": "Opinionated code formatter",
+  "lang": "en-US",
+  "start_url": ".",
+  "scope": ".",
+  "display": "browser",
+  "theme_color": "#1A2B34",
+  "icons": [
+    {
+      "src": "icon.png"
+    }
+  ]
+}
diff --git a/docs/playground.js b/docs/playground.js
index f15c639d4..c2dc51708 100644
--- a/docs/playground.js
+++ b/docs/playground.js
@@ -2,7 +2,28 @@
 /* eslint no-var: off, strict: off, prefer-arrow-callback: off */
 /* global CodeMirror prettierVersion */
 
-(function() {
+var state = (function loadState(hash) {
+  try {
+    return JSON.parse(hash);
+  } catch (error) {
+    return {
+      options: undefined,
+      content:
+        'hello ( "world"\n);\n\n' +
+          '[ "lorem", "ipsum", \'dolor\', sit("amet"), consectetur[ \'adipiscing\' ] + "elit" ].reduce(\n  (first, second) => first + second,\n  "")\n\n' +
+          "const Foo = ({ bar, baz, things }) => {\n" +
+          '  return <div style={{\ncolor: "papayawhip"}}>\n' +
+          "    <br/>{things.map(thing => reallyLongPleaseDontPutOnOneLine(thing) ? <p>{ok}</p> : <Quax bar={bar} baz={ baz } {...thing}></Quax>)\n" +
+          "  }</div>}"
+    };
+  }
+})(decodeURIComponent(location.hash.slice(1)));
+
+var worker = new Worker("./worker.js");
+// Warm up the worker (load the current parser while CodeMirror loads)
+worker.postMessage({ text: "", options: state.options });
+
+window.onload = function() {
   var OPTIONS = [
     "printWidth",
     "tabWidth",
@@ -13,8 +34,11 @@
     "parser",
     "semi",
     "useTabs",
-    "doc"
+    "doc",
+    "ast"
   ];
+  state.options && setOptions(state.options);
+
   function setOptions(options) {
     OPTIONS.forEach(function(option) {
       var elem = document.getElementById(option);
@@ -45,12 +69,6 @@
     return options;
   }
 
-  function omitNonFormatterOptions(options) {
-    var optionsClone = Object.assign({}, options);
-    delete optionsClone.doc;
-    return optionsClone;
-  }
-
   function replaceHash(hash) {
     if (
       typeof URL === "function" &&
@@ -68,12 +86,13 @@
   function formatAsync() {
     var options = getOptions();
 
-    [docEditor, outputEditor].forEach(function(editor) {
-      editor.setOption("rulers", [
-        { column: options.printWidth, color: "#444444" }
-      ]);
-    });
-    document.getElementsByClassName("doc")[0].style.display = options.doc
+    outputEditor.setOption("rulers", [
+      { column: options.printWidth, color: "#444444" }
+    ]);
+    document.querySelector(".ast").style.display = options.ast
+      ? "flex"
+      : "none";
+    document.querySelector(".doc").style.display = options.doc
       ? "flex"
       : "none";
 
@@ -83,16 +102,14 @@
       )
     );
     replaceHash(value);
-    var formatterOptions = omitNonFormatterOptions(options);
     worker.postMessage({
       text: inputEditor.getValue(),
-      options: formatterOptions,
+      options: options,
+      ast: options.ast,
       doc: options.doc
     });
   }
 
-  document.querySelector(".options-container").onchange = formatAsync;
-
   var editorOptions = {
     lineNumbers: true,
     keyMap: "sublime",
@@ -112,32 +129,26 @@
     document.getElementById("doc-editor"),
     { readOnly: true, lineNumbers: false, theme: "neat" }
   );
-
+  var astEditor = CodeMirror.fromTextArea(
+    document.getElementById("ast-editor"),
+    { readOnly: true, lineNumbers: false, theme: "neat" }
+  );
   var outputEditor = CodeMirror.fromTextArea(
     document.getElementById("output-editor"),
     { readOnly: true, lineNumbers: true, theme: "neat" }
   );
 
-  var worker = new Worker("./worker.js");
+  Array.from(document.querySelectorAll("textarea")).forEach(function(element) {
+    element.classList.remove("loading");
+  });
+
   worker.onmessage = function(message) {
     outputEditor.setValue(message.data.formatted);
     docEditor.setValue(message.data.doc || "");
+    astEditor.setValue(message.data.ast || "");
   };
 
-  document.getElementsByClassName("version")[0].innerText = prettierVersion;
-
-  try {
-    var json = JSON.parse(decodeURIComponent(location.hash.slice(1)));
-    setOptions(json.options);
-    inputEditor.setValue(json.content);
-  } catch (e) {
-    inputEditor.setValue(
-      'hello ( "world"\n);\n\n' +
-        '[ "lorem", "ipsum", \'dolor\', sit("amet"), consectetur[ \'adipiscing\' ] + "elit" ].reduce(\n  (first, second) => first + second,\n  "")\n\n' +
-        "const Foo = ({ bar, baz, things }) => {\n" +
-        '  return <div style={{\ncolor: "papayawhip"}}>\n' +
-        "    <br/>{things.map(thing => reallyLongPleaseDontPutOnOneLine(thing) ? <p>{ok}</p> : <Quax bar={bar} baz={ baz } {...thing}></Quax>)\n" +
-        "  }</div>}"
-    );
-  }
-})();
+  inputEditor.setValue(state.content);
+  document.querySelector(".options-container").onchange = formatAsync;
+  document.querySelector(".version").innerText = prettierVersion;
+};
diff --git a/docs/prettier.png b/docs/prettier.png
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/docs/service-worker.js b/docs/service-worker.js
new file mode 100644
index 000000000..da15b5579
--- /dev/null
+++ b/docs/service-worker.js
@@ -0,0 +1,36 @@
+/* eslint-env serviceworker */
+/* global toolbox */
+
+"use strict";
+
+importScripts("lib/sw-toolbox.js");
+
+toolbox.precache([
+  // Scripts
+  "lib/prettier-version.js",
+  "lib/index.js",
+  "lib/parser-babylon.js",
+  "lib/parser-typescript.js",
+  "lib/parser-flow.js",
+  "playground.js",
+  "lib/sw-toolbox.js",
+  "lib/sw-toolbox-companion.js",
+
+  // CodeMirror
+  "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/codemirror.css",
+  "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/theme/neat.css",
+  "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/codemirror.js",
+  "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/mode/javascript/javascript.js",
+  "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/addon/display/rulers.js",
+  "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/addon/search/searchcursor.js",
+  "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/addon/edit/matchbrackets.js",
+  "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/addon/edit/closebrackets.js",
+  "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/addon/comment/comment.js",
+  "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/addon/wrap/hardwrap.js",
+  "https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.26.0/keymap/sublime.js",
+
+  // Images
+  "prettier.png"
+]);
+
+toolbox.router.default = toolbox.fastest;
diff --git a/docs/worker.js b/docs/worker.js
index f86bf574b..cc835ebef 100644
--- a/docs/worker.js
+++ b/docs/worker.js
@@ -22,27 +22,47 @@ var prettier = index; // eslint-disable-line
 var parsersLoaded = {};
 
 self.onmessage = function(message) {
-  lazyLoadParser(message.data.options.parser);
+  const options = message.data.options || {
+    parser: "babylon"
+  };
 
-  var formatted, doc;
+  delete options.ast;
+  delete options.doc;
+
+  lazyLoadParser(options.parser);
+
+  var formatted, doc, ast;
   try {
-    formatted = prettier.format(message.data.text, message.data.options);
+    formatted = prettier.format(message.data.text, options);
   } catch (e) {
     formatted = e.toString();
   }
 
+  if (message.data.ast) {
+    try {
+      ast = JSON.stringify(
+        prettier.__debug.parse(message.data.text, options),
+        null,
+        2
+      );
+    } catch (e) {
+      ast = e.toString();
+    }
+  }
+
   if (message.data.doc) {
+    lazyLoadParser("babylon");
     try {
       doc = prettier.__debug.formatDoc(
-        prettier.__debug.printToDoc(message.data.text, message.data.options),
-        {}
+        prettier.__debug.printToDoc(message.data.text, options),
+        { parser: "babylon" }
       );
     } catch (e) {
       doc = e.toString();
     }
   }
 
-  self.postMessage({ formatted: formatted, doc: doc });
+  self.postMessage({ formatted: formatted, doc: doc, ast: ast });
 };
 
 function lazyLoadParser(parser) {
diff --git a/package.json b/package.json
index cd58b43ea..7a60479bd 100644
--- a/package.json
+++ b/package.json
@@ -49,6 +49,7 @@
     "rollup-plugin-node-globals": "1.1.0",
     "rollup-plugin-node-resolve": "2.0.0",
     "rollup-plugin-replace": "1.1.1",
+    "sw-toolbox": "3.6.0",
     "uglify-es": "3.0.15",
     "webpack": "2.6.1"
   },
diff --git a/scripts/build/build.sh b/scripts/build/build.sh
index eab126816..77ea93861 100755
--- a/scripts/build/build.sh
+++ b/scripts/build/build.sh
@@ -55,6 +55,10 @@ sed --in-place='' -e 's/eval("require")/require/g' dist/index.js dist/bin/pretti
 echo 'Create prettier-version.js'
 node -p '`prettierVersion = "${require(".").version}";`' > docs/lib/prettier-version.js
 
+echo 'Copy sw-toolbox.js to docs'
+cp node_modules/sw-toolbox/sw-toolbox.js docs/lib/sw-toolbox.js
+cp node_modules/sw-toolbox/companion.js  docs/lib/sw-toolbox-companion.js
+
 echo 'Copy package.json'
 node -p "pkg = require('./package.json'), delete pkg.dependencies, JSON.stringify(pkg, null, 2)" > dist/package.json
 
diff --git a/yarn.lock b/yarn.lock
index 37fafaf68..ec8fcbd2e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1951,6 +1951,10 @@ is-utf8@^0.2.0:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/is-utf8/-/is-utf8-0.2.1.tgz#4b0da1442104d1b336340e80797e865cf39f7d72"
 
+isarray@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/isarray/-/isarray-0.0.1.tgz#8a18acfca9a8f4177e09abfc6038939b05d1eedf"
+
 isarray@1.0.0, isarray@^1.0.0, isarray@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"
@@ -2792,6 +2796,12 @@ path-parse@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.5.tgz#3c1adf871ea9cd6c9431b6ea2bd74a0ff055c4c1"
 
+path-to-regexp@^1.0.1:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-1.7.0.tgz#59fde0f435badacba103a84e9d3bc64e96b9937d"
+  dependencies:
+    isarray "0.0.1"
+
 path-type@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/path-type/-/path-type-1.1.0.tgz#59c44f7ee491da704da415da5a4070ba4f8fe441"
@@ -3273,6 +3283,10 @@ sax@^1.2.1:
   version "5.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.3.0.tgz#9b2ce5d3de02d17c6012ad326aa6b4d0cf54f94f"
 
+serviceworker-cache-polyfill@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/serviceworker-cache-polyfill/-/serviceworker-cache-polyfill-4.0.0.tgz#de19ee73bef21ab3c0740a37b33db62464babdeb"
+
 set-blocking@^2.0.0, set-blocking@~2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/set-blocking/-/set-blocking-2.0.0.tgz#045f9782d011ae9a6803ddd382b24392b3d890f7"
@@ -3471,6 +3485,13 @@ supports-color@^3.1.0, supports-color@^3.1.2, supports-color@^3.2.3:
   dependencies:
     has-flag "^1.0.0"
 
+sw-toolbox@3.6.0:
+  version "3.6.0"
+  resolved "https://registry.yarnpkg.com/sw-toolbox/-/sw-toolbox-3.6.0.tgz#26df1d1c70348658e4dea2884319149b7b3183b5"
+  dependencies:
+    path-to-regexp "^1.0.1"
+    serviceworker-cache-polyfill "^4.0.0"
+
 symbol-tree@^3.2.1:
   version "3.2.2"
   resolved "https://registry.yarnpkg.com/symbol-tree/-/symbol-tree-3.2.2.tgz#ae27db38f660a7ae2e1c3b7d1bc290819b8519e6"