diff --git a/app.js b/app.js
index f0fbb32..4de2874 100644
--- a/app.js
+++ b/app.js
@@ -12,8 +12,9 @@ customElements.define('m-page-menu', PageMenu)
 
 class Setup {
   async run() {
-    navigator.serviceWorker
-    .addEventListener('controllerchange', () => {
+    const sw = navigator.serviceWorker
+    
+    sw.addEventListener('controllerchange', () => {
       if (this.registration.active) {
         window.location.reload(true)
       }
diff --git a/components/header.js b/components/header.js
index 06f9be1..306a064 100644
--- a/components/header.js
+++ b/components/header.js
@@ -5,11 +5,19 @@ export class Header extends HTMLElement {
     </svg>`,
     dot: `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-three-dots" viewBox="0 0 16 16">
   <path d="M3 9.5a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3zm5 0a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3zm5 0a1.5 1.5 0 1 1 0-3 1.5 1.5 0 0 1 0 3z"/>
+</svg>`,
+    edit: `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-pencil-square" viewBox="0 0 16 16">
+      <path d="M15.502 1.94a.5.5 0 0 1 0 .706L14.459 3.69l-2-2L13.502.646a.5.5 0 0 1 .707 0l1.293 1.293zm-1.75 2.456-2-2L4.939 9.21a.5.5 0 0 0-.121.196l-.805 2.414a.25.25 0 0 0 .316.316l2.414-.805a.5.5 0 0 0 .196-.12l6.813-6.814z"/>
+      <path fill-rule="evenodd" d="M1 13.5A1.5 1.5 0 0 0 2.5 15h11a1.5 1.5 0 0 0 1.5-1.5v-6a.5.5 0 0 0-1 0v6a.5.5 0 0 1-.5.5h-11a.5.5 0 0 1-.5-.5v-11a.5.5 0 0 1 .5-.5H9a.5.5 0 0 0 0-1H2.5A1.5 1.5 0 0 0 1 2.5v11z"/>
+</svg>`,
+    check: `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-check-lg" viewBox="0 0 16 16">
+      <path d="M12.736 3.97a.733.733 0 0 1 1.047 0c.286.289.29.756.01 1.05L7.88 12.01a.733.733 0 0 1-1.065.02L3.217 8.384a.757.757 0 0 1 0-1.06.733.733 0 0 1 1.047 0l3.052 3.093 5.4-6.425a.247.247 0 0 1 .02-.022Z"/>
 </svg>`,
   }
 
   constructor() {
     super()
+    this.editing = false
     this.attachShadow({mode: 'open'})
     this.addButton(this.icons.menu, 'nav', () => {
       this.menu.pages = this.getPages()
@@ -17,6 +25,11 @@ export class Header extends HTMLElement {
       this.overlay.classList.add('open')
     })
     this.addDivider()
+    this.editBtn = this.addButton(this.editIcon, 'edit', () => {
+      this.dispatchEvent(new CustomEvent(
+        'click-edit', {bubbles: true}
+      ))
+    })
     this.addButton(this.icons.dot, 'page', () => {
       this.pageMenuPanel.classList.add('open')
       this.overlay.classList.add('open')
@@ -33,6 +46,7 @@ export class Header extends HTMLElement {
     if (onClick) {
       b.addEventListener('click', onClick)
     }
+    return b
   }
 
   addDivider() {
@@ -53,7 +67,7 @@ export class Header extends HTMLElement {
     this.overlay.addEventListener('click', () => {
       this.close()
     })
-    this.menu.addEventListener('close', () => {
+    this.menu.addEventListener('close-menu', () => {
       this.close()
     })
   }
@@ -76,7 +90,7 @@ export class Header extends HTMLElement {
       el.click()
       this.shadowRoot.removeChild(el)
     })
-    this.pageMenu.addEventListener('close', () => {
+    this.pageMenu.addEventListener('close-menu', () => {
       this.close()
     })
     this.pageMenuPanel = document.createElement('div')
@@ -166,4 +180,19 @@ export class Header extends HTMLElement {
   getPages() {
     return Object.keys(localStorage).slice().sort()
   }
+
+  set editing(value) {
+    this._editing = value
+    if (this.editBtn) {
+      this.editBtn.innerHTML = this.editIcon
+    }
+  }
+
+  get editing() {
+    return this._editing
+  }
+
+  get editIcon() {
+    return this.editing ? this.icons.check : this.icons.edit
+  }
 }
\ No newline at end of file
diff --git a/components/layout.js b/components/layout.js
index 4665841..bd22996 100644
--- a/components/layout.js
+++ b/components/layout.js
@@ -2,12 +2,9 @@ export class Layout extends HTMLElement {
   constructor() {
     super()
     this.attachShadow({mode: 'open'})
+    this.csp = "default-src 'self' 'unsafe-inline' 'unsafe-eval'"
     this.header = document.createElement('m-header')
-    this.shadowRoot.appendChild(this.header)
-    this.load()
-    addEventListener('hashchange', () => {
-      this.load()
-    })
+    this.editing = false
   }
 
   connectedCallback() {
@@ -24,13 +21,24 @@ export class Layout extends HTMLElement {
       }
     `
     this.shadowRoot.appendChild(style)
+    this.header.editing = this.editing
+    this.header.addEventListener('click-edit', () => {
+      this.editing = !this.editing
+    })
+    this.shadowRoot.appendChild(this.header)
+    this.load()
+    addEventListener('hashchange', () => {
+      this.load()
+    })
   }
 
   load() {
     const path = this.path
     const prevPage = this.page
     this.page = document.createElement('m-page')
+    this.page.csp = this.csp
     this.page.path = path
+    this.editing = this.editing
     if (prevPage !== undefined) {
       prevPage.remove()
     }
@@ -39,9 +47,18 @@ export class Layout extends HTMLElement {
   }
 
   get path() {
-    return new URL(
-      window.location.hash.slice(1) || '/',
-      window.location
-    ).pathname
+    return '/hello'
+  }
+
+  set editing(value) {
+    this._editing = value
+    this.header.editing = this.editing
+    if (this.page) {
+      this.page.editing = this.editing
+    }
+  }
+
+  get editing() {
+    return this._editing
   }
 }
\ No newline at end of file
diff --git a/components/nav-menu.js b/components/nav-menu.js
index 53919e6..f260642 100644
--- a/components/nav-menu.js
+++ b/components/nav-menu.js
@@ -35,7 +35,7 @@ export class NavMenu extends HTMLElement {
     this.shadowRoot.addEventListener('click', e => {
       if (e.target.classList.contains('page')) {
         this.dispatchEvent(new CustomEvent(
-          'close', {bubbles: true}
+          'close-menu', {bubbles: true}
         ))
       }
     })
diff --git a/components/page-menu.js b/components/page-menu.js
index 61fd0da..a433bda 100644
--- a/components/page-menu.js
+++ b/components/page-menu.js
@@ -45,7 +45,7 @@ export class PageMenu extends HTMLElement {
     this.shadowRoot.appendChild(btn)
     btn.addEventListener('click', () => {
       this.dispatchEvent(new CustomEvent(
-        'close', {bubbles: true}
+        'close-menu', {bubbles: true}
       ))
       handler()
     })
diff --git a/components/page.js b/components/page.js
index d5d429a..a9bac7a 100644
--- a/components/page.js
+++ b/components/page.js
@@ -17,7 +17,7 @@ const frameHtml = `<!doctype html>
   </head>
   <body>
     <iframe srcdoc="" sandbox="allow-scripts"></iframe>
-    <script type="module">
+    ${'<'}script type="module">
 const frame = document.getElementsByTagName('iframe')[0]
 addEventListener('message', event => {
   const d = event.data
@@ -27,7 +27,7 @@ addEventListener('message', event => {
     frame.postMessage(event.data)
   }
 })
-    </script>
+    ${'</'}script>
   </body>
 </html>`
 
@@ -35,12 +35,11 @@ export class Page extends HTMLElement {
   constructor() {
     super()
     const shadow = this.attachShadow({mode: 'open'})
+    this.csp = "default-src 'self' 'unsafe-inline' 'unsafe-eval'"
+    //this.editing = false
     this.textArea = document.createElement('textarea')
     this.textArea.addEventListener('input', e => {
-      localStorage.setItem(
-        this.path,
-        e.target.value
-      )
+      this.body = e.target.value
     })
     const div = document.createElement('div')
     div.classList.add('twrap')
@@ -49,9 +48,7 @@ export class Page extends HTMLElement {
   }
 
   connectedCallback() {
-    this.textArea.value = localStorage.getItem(
-      this.path
-    ) ?? ''
+    this.textArea.value = this.body
     const style = document.createElement('style')
     style.textContent = `
       :host {
@@ -76,35 +73,90 @@ export class Page extends HTMLElement {
         width: 100%;
         height: 90vh;
       }
+      :host(.editing) iframe {
+        display: none;
+      }
+      :host(.viewing) textarea {
+        display: none;
+      }
     `
     this.shadowRoot.append(style)
-    if (this.path.startsWith('/sandbox/')) {
-      this.initFrame()
-    }
+    this.initFrame()
+    this.editing = this.editing
   }
 
   initFrame() {
     const wrap = document.createElement('div')
     this.shadowRoot.appendChild(wrap)
     const tmp = document.createElement('iframe')
-    tmp.sandbox = "allow-same-origin allow-scripts"
-    const url = new URL(
-      '/-/frame', location.href
-    )
-    url.searchParams.set(
-      'csp',
-      "default-src 'self' 'unsafe-inline' 'unsafe-eval'"
-    )
-    url.searchParams.set('html', frameHtml)
-    tmp.src = url.href
+    if (this.csp !== undefined) {
+      tmp.sandbox = "allow-same-origin allow-scripts"
+      const url = new URL(
+        '/-/frame', location.href
+      )
+      url.searchParams.set('csp', this.csp)
+      url.searchParams.set('html', frameHtml)
+      tmp.src = url.href
+    } else {
+      tmp.sandbox = "allow-scripts"
+      tmp.srcdoc = frameHtml
+    }
     wrap.insertAdjacentHTML(
       'beforeend', tmp.outerHTML
     )
     const frames = wrap.getElementsByTagName('iframe')
     this.frame = frames[frames.length - 1]
     this.textArea.addEventListener('blur', e => {
-      const msg = ['srcdoc', e.target.value]
-this.frame.contentWindow.postMessage(msg)
+      this.display(e.target.value)
+    })
+    this.frame.addEventListener('load', () => {
+      this.display(this.body)
     })
   }
+
+  display(value) {
+    let doc = value
+    if (!(/<\w/).test(doc.substring(0, 30))) {
+      doc = `<pre style="white-space: pre-wrap; margin: 8px 12px; font-family: monospace;">` +
+        doc.replace("<", "&lt;").replace(">", "&gt;") +
+      `</pre>`
+    }
+    const msg = ['srcdoc', doc]
+    this.frame.contentWindow.postMessage(msg, '*')
+  }
+
+  set body(value) {
+    try {
+      localStorage.setItem(this.path, value)
+    } catch (err) {
+      console.error(err)
+    }
+  }
+
+  get body() {
+    try {
+      return localStorage.getItem(this.path)
+    } catch (err) {
+      console.error(err)
+      return ''
+    }
+  }
+
+  set editing(value) {
+    this._editing = value
+    if (this.shadowRoot.host) {
+      const classes = this.shadowRoot.host.classList
+      if (this.editing) {
+        classes.add('editing')
+        classes.remove('viewing')
+      } else {
+        classes.add('viewing')
+        classes.remove('editing')
+      }
+    }
+  }
+
+  get editing() {
+    return this._editing
+  }
 }
\ No newline at end of file
diff --git a/sw.js b/sw.js
index b8de43e..6c8bede 100644
--- a/sw.js
+++ b/sw.js
@@ -13,6 +13,7 @@ async function initCache() {
 }
 
 self.addEventListener("install", event => {
+  self.skipWaiting()
   event.waitUntil(initCache())
 })