diff --git a/src/core/config.js b/src/core/config.js
new file mode 100644
index 00000000..d344aae9
--- /dev/null
+++ b/src/core/config.js
@@ -0,0 +1,38 @@
+import { merge, camelize, isPrimitive } from './util/core'
+
+const config = merge({
+  el: '#app',
+  repo: '',
+  maxLevel: 6,
+  subMaxLevel: 0,
+  loadSidebar: null,
+  loadNavbar: null,
+  homepage: 'README.md',
+  coverpage: '',
+  basePath: '',
+  auto2top: false,
+  name: '',
+  themeColor: '',
+  nameLink: window.location.pathname,
+  ga: ''
+}, window.$docsify)
+
+const script = document.currentScript || [].slice.call(document.getElementsByTagName('script')).pop()
+
+if (script) {
+  for (const prop in config) {
+    const val = script.getAttribute('data-' + camelize(prop))
+
+    if (isPrimitive(val)) {
+      config[prop] = val === '' ? true : val
+    }
+  }
+
+  if (config.loadSidebar === true) config.loadSidebar = '_sidebar.md'
+  if (config.loadNavbar === true) config.loadNavbar = '_navbar.md'
+  if (config.coverpage === true) config.coverpage = '_coverpage.md'
+  if (config.repo === true) config.repo = ''
+  if (config.name === true) config.name = ''
+}
+
+export default config
diff --git a/src/core/event/index.js b/src/core/event/index.js
new file mode 100644
index 00000000..46d9d284
--- /dev/null
+++ b/src/core/event/index.js
@@ -0,0 +1,11 @@
+export function eventMixin (Docsify) {
+  Docsify.prototype.$bindEvents = function () {
+  }
+
+  Docsify.prototype.$resetEvents = function () {
+  }
+}
+
+export function initEvent (vm) {
+  vm.$bindEvents()
+}
diff --git a/src/core/fetch/ajax.js b/src/core/fetch/ajax.js
new file mode 100644
index 00000000..ba79b766
--- /dev/null
+++ b/src/core/fetch/ajax.js
@@ -0,0 +1,37 @@
+import progressbar from '../render/progressbar'
+import { noop } from '../util/core'
+
+/**
+ * Simple ajax get
+ * @param  {String} url
+ * @param {Boolean} [loading=false] has loading bar
+ * @return { then(resolve, reject), abort }
+ */
+export function get (url, hasLoading = false) {
+  const xhr = new XMLHttpRequest()
+
+  xhr.open('GET', url)
+  xhr.send()
+
+  return {
+    then: function (success, error = noop) {
+      const on = xhr.addEventListener
+
+      if (hasLoading) {
+        const id = setInterval(_ => progressbar({}), 500)
+
+        on('progress', progressbar)
+        on('loadend', evt => {
+          progressbar(evt)
+          clearInterval(id)
+        })
+      }
+
+      on('error', error)
+      on('load', ({ target }) => {
+        target.status >= 400 ? error(target) : success(target.response)
+      })
+    },
+    abort: () => xhr.readyState !== 4 && xhr.abort()
+  }
+}
diff --git a/src/core/fetch/index.js b/src/core/fetch/index.js
new file mode 100644
index 00000000..7771e898
--- /dev/null
+++ b/src/core/fetch/index.js
@@ -0,0 +1,13 @@
+import { callHook } from '../init/lifecycle'
+
+export function fetchMixin (Docsify) {
+  Docsify.prototype.$fetch = function () {
+  }
+}
+
+export function initFetch (vm) {
+  vm.$fetch(result => {
+    vm.$resetEvents()
+    callHook(vm, 'doneEach')
+  })
+}
diff --git a/src/core/index.js b/src/core/index.js
new file mode 100644
index 00000000..96cab23a
--- /dev/null
+++ b/src/core/index.js
@@ -0,0 +1,30 @@
+import { initMixin } from './init'
+import { routeMixin } from './route'
+import { renderMixin } from './render'
+import { fetchMixin } from './fetch'
+import { eventMixin } from './event'
+import * as util from './util'
+import { get as load } from './fetch/ajax'
+import * as routeUtil from './route/util'
+
+function Docsify () {
+  this._init()
+}
+
+initMixin(Docsify)
+routeMixin(Docsify)
+renderMixin(Docsify)
+fetchMixin(Docsify)
+eventMixin(Docsify)
+
+/**
+ * Global API
+ */
+window.Docsify = {
+  util: util.merge({ load }, util, routeUtil)
+}
+
+/**
+ * Run Docsify
+ */
+setTimeout(() => new Docsify(), 0)
diff --git a/src/core/init/index.js b/src/core/init/index.js
new file mode 100644
index 00000000..8a6c2a3e
--- /dev/null
+++ b/src/core/init/index.js
@@ -0,0 +1,27 @@
+import config from '../config'
+import { initLifecycle, callHook } from './lifecycle'
+import { initRender } from '../render'
+import { initRoute } from '../route'
+import { initEvent } from '../event'
+import { initFetch } from '../fetch'
+import { isFn } from '../util/core'
+
+export function initMixin (Docsify) {
+  Docsify.prototype._init = function () {
+    const vm = this
+    vm._config = config || {}
+
+    initLifecycle(vm) // Init hooks
+    initPlugin(vm) // Install plugins
+    callHook(vm, 'init')
+    initRender(vm) // Render base DOM
+    initEvent(vm) // Bind events
+    initRoute(vm) // Add hashchange eventListener
+    initFetch(vm) // Fetch data
+    callHook(vm, 'ready')
+  }
+}
+
+function initPlugin (vm) {
+  [].concat(vm.config.plugins).forEach(fn => isFn(fn) && fn(vm.bindHook))
+}
diff --git a/src/core/init/lifecycle.js b/src/core/init/lifecycle.js
new file mode 100644
index 00000000..e4a48a84
--- /dev/null
+++ b/src/core/init/lifecycle.js
@@ -0,0 +1,41 @@
+import { noop } from '../util/core'
+
+export function initLifecycle (vm) {
+  const hooks = ['init', 'beforeEach', 'afterEach', 'doneEach', 'ready']
+
+  vm._hooks = {}
+  vm.bindHook = {}
+  hooks.forEach(hook => {
+    const arr = vm._hooks[hook] = []
+    vm._bindHook[hook] = fn => arr.push(fn)
+  })
+}
+
+export function callHook (vm, hook, data, next = noop) {
+  let newData = data
+  const queue = vm._hooks[hook]
+
+  const step = function (index) {
+    const hook = queue[index]
+    if (index >= queue.length) {
+      next(newData)
+    } else {
+      if (typeof hook === 'function') {
+        if (hook.length === 2) {
+          hook(data, result => {
+            newData = result
+            step(index + 1)
+          })
+        } else {
+          const result = hook(data)
+          newData = result !== undefined ? result : newData
+          step(index + 1)
+        }
+      } else {
+        step(index + 1)
+      }
+    }
+  }
+
+  step(0)
+}
diff --git a/src/core/render/dom.js b/src/core/render/dom.js
new file mode 100644
index 00000000..8277095c
--- /dev/null
+++ b/src/core/render/dom.js
@@ -0,0 +1,12 @@
+const cacheNode = {}
+
+export function getCacheNode (el) {
+  if (typeof el === 'string') {
+    const selector = el
+
+    el = cacheNode[el] || document.querySelector(el)
+    if (!el) console.error('Cannot find element:', selector)
+  }
+
+  return el
+}
diff --git a/src/core/render/index.js b/src/core/render/index.js
new file mode 100644
index 00000000..03ef3f0c
--- /dev/null
+++ b/src/core/render/index.js
@@ -0,0 +1,9 @@
+export function renderMixin (Docsify) {
+  Docsify.prototype._renderTo = function (dom, content) {
+
+  }
+}
+
+export function initRender (vm) {
+  // init
+}
diff --git a/src/core/render/progressbar.js b/src/core/render/progressbar.js
new file mode 100644
index 00000000..1da5b225
--- /dev/null
+++ b/src/core/render/progressbar.js
@@ -0,0 +1,45 @@
+import { isPrimitive } from '../util/core'
+
+let loadingEl
+let timeId
+
+/**
+ * Init progress component
+ */
+function init () {
+  if (loadingEl) return
+  const div = document.createElement('div')
+
+  div.classList.add('progress')
+  document.body.appendChild(div)
+  loadingEl = div
+}
+/**
+ * Render progress bar
+ */
+export default function ({ loaded, total, step }) {
+  let num
+
+  loadingEl = init()
+
+  if (!isPrimitive(step)) {
+    step = Math.floor(Math.random() * 5 + 1)
+  }
+  if (step) {
+    num = parseInt(loadingEl.style.width, 10) + step
+    num = num > 80 ? 80 : num
+  } else {
+    num = Math.floor(loaded / total * 100)
+  }
+
+  loadingEl.style.opacity = 1
+  loadingEl.style.width = num >= 95 ? '100%' : num + '%'
+
+  if (num >= 95) {
+    clearTimeout(timeId)
+    timeId = setTimeout(_ => {
+      loadingEl.style.opacity = 0
+      loadingEl.style.width = '0%'
+    }, 200)
+  }
+}
diff --git a/src/tpl.js b/src/core/render/tpl.js
similarity index 98%
rename from src/tpl.js
rename to src/core/render/tpl.js
index 66551296..df589791 100644
--- a/src/tpl.js
+++ b/src/core/render/tpl.js
@@ -1,4 +1,4 @@
-import { isMobile } from './util'
+import { isMobile } from '../util/core'
 /**
  * Render github corner
  * @param  {Object} data
diff --git a/src/core/route/hash.js b/src/core/route/hash.js
new file mode 100644
index 00000000..90d180c6
--- /dev/null
+++ b/src/core/route/hash.js
@@ -0,0 +1,24 @@
+import { cleanPath, getLocation } from './util'
+
+export function ensureSlash () {
+  const path = getHash()
+  if (path.charAt(0) === '/') return
+  replaceHash('/' + path)
+}
+
+export function getHash () {
+  // We can't use window.location.hash here because it's not
+  // consistent across browsers - Firefox will pre-decode it!
+  const href = window.location.href
+  const index = href.indexOf('#')
+  return index === -1 ? '' : href.slice(index + 1)
+}
+
+function replaceHash (path) {
+  const i = window.location.href.indexOf('#')
+  window.location.replace(
+    window.location.href.slice(0, i >= 0 ? i : 0) + '#' + path
+  )
+}
+
+// TODO 把第二个 hash 转成 ?id=
diff --git a/src/core/route/index.js b/src/core/route/index.js
new file mode 100644
index 00000000..011db741
--- /dev/null
+++ b/src/core/route/index.js
@@ -0,0 +1,17 @@
+import { ensureSlash } from './hash'
+
+export function routeMixin (Docsify) {
+  Docsify.prototype.$route = {
+    query: location.query || {},
+    path: location.path || '/',
+    base: ''
+  }
+}
+
+export function initRoute (vm) {
+  ensureSlash()
+  window.addEventListener('hashchange', () => {
+    ensureSlash()
+    vm.$fetch()
+  })
+}
diff --git a/src/core/route/util.js b/src/core/route/util.js
new file mode 100644
index 00000000..4cbf898b
--- /dev/null
+++ b/src/core/route/util.js
@@ -0,0 +1,11 @@
+export function cleanPath (path) {
+  return path.replace(/\/+/g, '/')
+}
+
+export function getLocation (base) {
+  let path = window.location.pathname
+  if (base && path.indexOf(base) === 0) {
+    path = path.slice(base.length)
+  }
+  return (path || '/') + window.location.search + window.location.hash
+}
diff --git a/src/core/util/core.js b/src/core/util/core.js
new file mode 100644
index 00000000..96889839
--- /dev/null
+++ b/src/core/util/core.js
@@ -0,0 +1,56 @@
+/**
+ * Create a cached version of a pure function.
+ */
+function cached (fn) {
+  const cache = Object.create(null)
+  return function cachedFn (str) {
+    const hit = cache[str]
+    return hit || (cache[str] = fn(str))
+  }
+}
+
+/**
+ * Camelize a hyphen-delimited string.
+ */
+const camelizeRE = /-(\w)/g
+export const camelize = cached((str) => {
+  return str.replace(camelizeRE, (_, c) => c ? c.toUpperCase() : '')
+})
+
+/**
+ * Simple Object.assign polyfill
+ */
+export const merge = Object.assign || function (to) {
+  const hasOwn = Object.prototype.hasOwnProperty
+
+  for (let i = 1; i < arguments.length; i++) {
+    const from = Object(arguments[i])
+
+    for (const key in from) {
+      if (hasOwn.call(from, key)) {
+        to[key] = from[key]
+      }
+    }
+  }
+
+  return to
+}
+
+/**
+ * Check if value is primitive
+ */
+export function isPrimitive (value) {
+  return typeof value === 'string' || typeof value === 'number'
+}
+
+/**
+ * Perform no operation.
+ */
+export function noop () {}
+
+/**
+ * Check if value is function
+ */
+export function isFn (obj) {
+  return typeof obj === 'function'
+}
diff --git a/src/core/util/env.js b/src/core/util/env.js
new file mode 100644
index 00000000..1e79cfe0
--- /dev/null
+++ b/src/core/util/env.js
@@ -0,0 +1,5 @@
+export const UA = window.navigator.userAgent.toLowerCase()
+
+export const isIE = UA && /msie|trident/.test(UA)
+
+export const isMobile = document.body.clientWidth <= 600
diff --git a/src/core/util/index.js b/src/core/util/index.js
new file mode 100644
index 00000000..bfcc8b27
--- /dev/null
+++ b/src/core/util/index.js
@@ -0,0 +1,2 @@
+export * from './core'
+export * from './env'
diff --git a/src/polyfill.js b/src/core/util/polyfill/css-vars.js
similarity index 91%
rename from src/polyfill.js
rename to src/core/util/polyfill/css-vars.js
index f3a032b7..f0200e6f 100644
--- a/src/polyfill.js
+++ b/src/core/util/polyfill/css-vars.js
@@ -1,4 +1,4 @@
-import { load } from './util'
+import { get } from '../fetch/ajax'
 
 function replaceVar (block) {
   block.innerHTML = block.innerHTML.replace(/var\(\s*--theme-color.*?\)/g, $docsify.themeColor)
@@ -18,7 +18,7 @@ export function cssVars () {
 
       if (!/\.css$/.test(href)) return
 
-      load(href).then(res => {
+      get(href).then(res => {
         const style = document.createElement('style')
 
         style.innerHTML = res
diff --git a/src/hook.js b/src/hook.js
deleted file mode 100644
index 401765ae..00000000
--- a/src/hook.js
+++ /dev/null
@@ -1,57 +0,0 @@
-export default class Hook {
-  constructor () {
-    this.beforeHooks = []
-    this.afterHooks = []
-    this.initHooks = []
-    this.readyHooks = []
-    this.doneEachHooks = []
-  }
-
-  beforeEach (fn) {
-    this.beforeHooks.push(fn)
-  }
-
-  afterEach (fn) {
-    this.afterHooks.push(fn)
-  }
-
-  doneEach (fn) {
-    this.doneEachHooks.push(fn)
-  }
-
-  init (fn) {
-    this.initHooks.push(fn)
-  }
-
-  ready (fn) {
-    this.readyHooks.push(fn)
-  }
-
-  emit (name, data, next) {
-    let newData = data
-    const queue = this[name + 'Hooks']
-    const step = function (index) {
-      const hook = queue[index]
-      if (index >= queue.length) {
-        next && next(newData)
-      } else {
-        if (typeof hook === 'function') {
-          if (hook.length === 2) {
-            hook(data, result => {
-              newData = result
-              step(index + 1)
-            })
-          } else {
-            const result = hook(data)
-            newData = result !== undefined ? result : newData
-            step(index + 1)
-          }
-        } else {
-          step(index + 1)
-        }
-      }
-    }
-
-    step(0)
-  }
-}
diff --git a/src/render.js b/src/render.js
index 26a5d538..41250887 100644
--- a/src/render.js
+++ b/src/render.js
@@ -235,36 +235,3 @@ export function renderCover (content) {
 
   event.sticky()
 }
-
-/**
- * render loading bar
- * @return {[type]} [description]
- */
-export function renderLoading ({ loaded, total, step }) {
-  let num
-
-  if (!CACHE.loading) {
-    const div = document.createElement('div')
-
-    div.classList.add('progress')
-    document.body.appendChild(div)
-    CACHE.loading = div
-  }
-  if (step) {
-    num = parseInt(CACHE.loading.style.width, 10) + step
-    num = num > 80 ? 80 : num
-  } else {
-    num = Math.floor(loaded / total * 100)
-  }
-
-  CACHE.loading.style.opacity = 1
-  CACHE.loading.style.width = num >= 95 ? '100%' : num + '%'
-
-  if (num >= 95) {
-    clearTimeout(renderLoading.cacheTimeout)
-    renderLoading.cacheTimeout = setTimeout(_ => {
-      CACHE.loading.style.opacity = 0
-      CACHE.loading.style.width = '0%'
-    }, 200)
-  }
-}