refactor support tab

src/app/tabs/styles/support-tab-styles.js

-var csjs = require('csjs-inject')
-var styleGuide = require('../../ui/styles-guide/theme-chooser')
-var styles = styleGuide.chooser()
-
-var css = csjs`
-  .supportTabView {
-    height: 100vh;
-    padding: 2%;
-    padding-bottom: 3em;
-    display: flex;
-    flex-direction: column;
-    overflow: hidden;
-  }
-  .chat {
-    ${styles.rightPanel.supportTab.box_IframeContainer}
-    display: flex;
-    flex-direction: column;
-    align-items: center;
-    height: 85%;
-    padding: 0;
-  }
-  .chatTitle {
-    height: 40px;
-    width: 90%;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    margin-top: 15px;
-  }
-  .chatTitle:hover {
-    cursor: pointer;
-  }
-  .icon {
-    height: 70%;
-    margin-right: 2%;
-  }
-  .chatTitleText {
-    font-size: 17px;
-    font-weight: bold;
-  }
-  .chatTitleText {
-    opacity: 0.8;
-  }
-  .chatIframe {
-    width: 100%;
-    height: 100%;
-    transform: scale(0.9);
-    padding: 0;
-    border: none;
-  }
-  .infoBox {
-    ${styles.rightPanel.supportTab.box_SupportInfo}
-  }
-`
-
-module.exports = css

src/app/tabs/support-tab.js

-var yo = require('yo-yo')
+const yo = require('yo-yo')
+const csjs = require('csjs-inject')
+const remixLib = require('remix-lib')
 
-var css = require('./styles/support-tab-styles')
+const styles = require('../ui/styles-guide/theme-chooser').chooser()
 
-var infoText = yo`
-  <div>
-    Have a question, found a bug or want to propose a feature? Have a look at the
-    <a target="_blank" href='https://github.com/ethereum/remix-ide/issues'> issues</a> or check out
-    <a target="_blank" href='https://remix.readthedocs.io/en/latest/'> the documentation page on Remix</a> or
-    <a target="_blank" href='https://solidity.readthedocs.io/en/latest/'> Solidity</a>.
-  </div>
-`
-
-let gitterIframe = yo`
-  <iframe class="${css.chatIframe}" src='https://gitter.im/ethereum/remix/~embed'>
-`
+const EventManager = remixLib.EventManager
 
-function supportTabView (gitterIframe) {
-  return yo`
-    <div class="${css.supportTabView} "id="supportView">
-      <div>
+module.exports = class SupportTab {
+  constructor (api = {}, events = {}, opts = {}) {
+    const self = this
+    self.event = new EventManager()
+    self._api = api
+    self._events = events
+    self._opts = opts
+    self._view = { el: null, gitterIframe: '' }
+    self.data = { gitterIsLoaded: false }
+    self._components = {}
+    self._events.app.register('tabChanged', (tabName) => {
+      if (tabName !== 'Support' || self.data.gitterIsLoaded) return
+      if (!self._view.gitterIframe) self._view.gitterIframe = yo`<iframe class="${css.chatIframe}" src='https://gitter.im/ethereum/remix/~embed'>`
+      yo.update(self._view.el, self.render())
+      self._view.el.style.display = 'block'
+      self.data.gitterIsLoaded = true
+    })
+  }
+  render () {
+    const self = this
+    self._view.el = yo`
+      <div class="${css.supportTabView} "id="supportView">
         <div class="${css.infoBox}">
-          ${infoText}
+          Have a question, found a bug or want to propose a feature? Have a look at the
+          <a target="_blank" href='https://github.com/ethereum/browser-solidity/issues'> issues</a> or check out
+          <a target="_blank" href='https://remix.readthedocs.io/en/latest/'> the documentation page on Remix</a> or
+          <a target="_blank" href='https://solidity.readthedocs.io/en/latest/'> Solidity</a>.
         </div>
-      </div>
-      <div class="${css.chat}">
-        <div class="${css.chatTitle}" onclick=${openLink} title='Click to open chat in Gitter'>
-          <div class="${css.chatTitleText}">ethereum/remix community chat</div>
+        <div class="${css.chat}">
+          <div class="${css.chatTitle}" onclick=${openLink} title='Click to open chat in Gitter'>
+            <div class="${css.chatTitleText}">ethereum/remix community chat</div>
+          </div>
+          ${self._view.gitterIframe}
         </div>
-        ${gitterIframe}
-      </div>
-    </div>
-  `
+      </div>`
+    return self._view.el
+    function openLink () { window.open('https://gitter.im/ethereum/remix') }
+  }
 }
 
-function supportTab (api = {}, events = {}, opts = {}) {
-  let el = supportTabView('')
-  let gitterIsLoaded = false
-
-  events.app.register('tabChanged', (tabName) => {
-    if (tabName !== 'Support' || gitterIsLoaded) {
-      return
-    }
-
-    yo.update(el, supportTabView(gitterIframe))
-    el.style.display = 'block'
-    gitterIsLoaded = true
-  })
-
-  return { render () { return el } }
-}
-
-function openLink () {
-  window.open('https://gitter.im/ethereum/remix')
-}
-
-module.exports = supportTab
+const css = csjs`
+  .supportTabView {
+    height: 100vh;
+    padding: 2%;
+    padding-bottom: 3em;
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+  }
+  .chat {
+    ${styles.rightPanel.supportTab.box_IframeContainer}
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    height: 85%;
+    padding: 0;
+  }
+  .chatTitle {
+    height: 40px;
+    width: 90%;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    margin-top: 15px;
+  }
+  .chatTitle:hover {
+    cursor: pointer;
+  }
+  .icon {
+    height: 70%;
+    margin-right: 2%;
+  }
+  .chatTitleText {
+    font-size: 17px;
+    font-weight: bold;
+  }
+  .chatTitleText {
+    opacity: 0.8;
+  }
+  .chatIframe {
+    width: 100%;
+    height: 100%;
+    transform: scale(0.9);
+    padding: 0;
+    border: none;
+  }
+  .infoBox {
+    ${styles.rightPanel.supportTab.box_SupportInfo}
+  }
+`