diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 000000000..80f989d97
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,11 @@
+# http://EditorConfig.org
+
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
diff --git a/build/build.js b/build/build.js
index 6fa2b123b..7dfa6b536 100644
--- a/build/build.js
+++ b/build/build.js
@@ -9,8 +9,16 @@ const version = process.env.VERSION || require('../package.json').version
 const chokidar = require('chokidar')
 const path = require('path')
 
-const build = function (opts) {
-  rollup
+/**
+ * @param {{
+ *   input: string,
+ *   output?: string,
+ *   globalName?: string,
+ *   plugins?: Array<import('rollup').Plugin>
+ * }} opts
+ */
+async function build(opts) {
+  await rollup
     .rollup({
       input: opts.input,
       plugins: (opts.plugins || []).concat([
@@ -27,31 +35,35 @@ const build = function (opts) {
       var dest = 'lib/' + (opts.output || opts.input)
 
       console.log(dest)
-      bundle.write({
+      return bundle.write({
         format: 'iife',
+        output: opts.globalName ? {name: opts.globalName} : {},
         file: dest,
         strict: false
       })
     })
-    .catch(function (err) {
-      console.error(err)
-    })
 }
-const buildCore = function () {
-  build({
+
+async function buildCore() {
+  const promises = []
+
+  promises.push(build({
     input: 'src/core/index.js',
-    output: 'docsify.js'
-  })
+    output: 'docsify.js',
+  }))
 
   if (isProd) {
-    build({
+    promises.push(build({
       input: 'src/core/index.js',
       output: 'docsify.min.js',
       plugins: [uglify()]
-    })
+    }))
   }
+
+  await Promise.all(promises)
 }
-const buildAllPlugin = function () {
+
+async function buildAllPlugin() {
   var plugins = [
     {name: 'search', input: 'search/index.js'},
     {name: 'ga', input: 'ga.js'},
@@ -64,8 +76,8 @@ const buildAllPlugin = function () {
     {name: 'gitalk', input: 'gitalk.js'}
   ]
 
-  plugins.forEach(item => {
-    build({
+  const promises = plugins.map(item => {
+    return build({
       input: 'src/plugins/' + item.input,
       output: 'plugins/' + item.name + '.js'
     })
@@ -73,47 +85,59 @@ const buildAllPlugin = function () {
 
   if (isProd) {
     plugins.forEach(item => {
-      build({
+      promises.push(build({
         input: 'src/plugins/' + item.input,
         output: 'plugins/' + item.name + '.min.js',
         plugins: [uglify()]
-      })
+      }))
     })
   }
+
+  await Promise.all(promises)
 }
 
-if (!isProd) {
-  chokidar
-    .watch(['src/core', 'src/plugins'], {
-      atomic: true,
-      awaitWriteFinish: {
-        stabilityThreshold: 1000,
-        pollInterval: 100
-      }
-    })
-    .on('change', p => {
-      console.log('[watch] ', p)
-      const dirs = p.split(path.sep)
-      if (dirs[1] === 'core') {
-        buildCore()
-      } else if (dirs[2]) {
-        const name = path.basename(dirs[2], '.js')
-        const input = `src/plugins/${name}${
-          /\.js/.test(dirs[2]) ? '' : '/index'
-        }.js`
+async function main() {
+  if (!isProd) {
+    chokidar
+      .watch(['src/core', 'src/plugins'], {
+        atomic: true,
+        awaitWriteFinish: {
+          stabilityThreshold: 1000,
+          pollInterval: 100
+        }
+      })
+      .on('change', p => {
+        console.log('[watch] ', p)
+        const dirs = p.split(path.sep)
+        if (dirs[1] === 'core') {
+          buildCore()
+        } else if (dirs[2]) {
+          const name = path.basename(dirs[2], '.js')
+          const input = `src/plugins/${name}${
+            /\.js/.test(dirs[2]) ? '' : '/index'
+          }.js`
 
-        build({
-          input,
-          output: 'plugins/' + name + '.js'
-        })
-      }
-    })
-    .on('ready', () => {
-      console.log('[start]')
-      buildCore()
+          build({
+            input,
+            output: 'plugins/' + name + '.js'
+          })
+        }
+      })
+      .on('ready', () => {
+        console.log('[start]')
+        buildCore()
+        buildAllPlugin()
+      })
+  } else {
+    await Promise.all([
+      buildCore(),
       buildAllPlugin()
-    })
-} else {
-  buildCore()
-  buildAllPlugin()
+    ])
+  }
 }
+
+main().catch((e) => {
+  console.error(e)
+  process.exit(1)
+})
+
diff --git a/build/css.js b/build/css.js
index 060506421..2214f3fe4 100644
--- a/build/css.js
+++ b/build/css.js
@@ -5,8 +5,8 @@ const {spawn} = require('child_process')
 const args = process.argv.slice(2)
 fs.readdir(path.join(__dirname, '../src/themes'), (err, files) => {
     if (err) {
-        console.log('err', err)
-        return
+        console.error('err', err)
+        process.exit(1)
     }
     files.map(async (file) => {
         if (/\.styl/g.test(file)) {
@@ -31,11 +31,17 @@ fs.readdir(path.join(__dirname, '../src/themes'), (err, files) => {
             });
 
             stylusCMD.on('close', (code) => {
-                console.log(`[Stylus Build ] child process exited with code ${code}`);
+                const message = `[Stylus Build ] child process exited with code ${code}`
+
+                if (code !== 0) {
+                  console.error(message);
+                  process.exit(code)
+                }
+                console.log(message);
             });
         } else {
             return
         }
 
     })
-})
\ No newline at end of file
+})
diff --git a/build/mincss.js b/build/mincss.js
index f6c5ec215..0c9c72280 100644
--- a/build/mincss.js
+++ b/build/mincss.js
@@ -8,5 +8,8 @@ files.forEach(file => {
   file = path.resolve('lib/themes', file)
   cssnano(fs.readFileSync(file)).then(result => {
     fs.writeFileSync(file, result.css)
+  }).catch(e => {
+    console.error(e)
+    process.exit(1)
   })
 })
diff --git a/build/ssr.js b/build/ssr.js
index 16b93cac4..01fdd0518 100644
--- a/build/ssr.js
+++ b/build/ssr.js
@@ -24,11 +24,12 @@ rollup
     var dest = 'packages/docsify-server-renderer/build.js'
 
     console.log(dest)
-    bundle.write({
+    return bundle.write({
       format: 'cjs',
       file: dest
     })
   })
   .catch(function (err) {
     console.error(err)
+    process.exit(1)
   })
diff --git a/docs/configuration.md b/docs/configuration.md
index 69735ae1b..371ed35f6 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -1,6 +1,6 @@
 # Configuration
 
-You can configure the `window.$docsify`.
+You can configure Docsify by defining `window.$docsify` as an object:
 
 ```html
 <script>
@@ -12,6 +12,24 @@ You can configure the `window.$docsify`.
 </script>
 ```
 
+The config can also be defined as a function, in which case the first arg is the Docsify `vm` instance. The function should return a config object. This can be useful for referencing `vm` in places like the markdown configuration:
+
+```html
+<script>
+  window.$docsify = function(vm) {
+    return {
+      markdown: {
+        renderer: {
+          code(code, lang) {
+            // ... use `vm` ...
+          },
+        },
+      },
+    };
+  };
+</script>
+```
+
 ## el
 
 - Type: `String`
diff --git a/package-lock.json b/package-lock.json
index e598bcd34..6d5b0cc0c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -85,15 +85,6 @@
       "integrity": "sha512-0fKu/QqildpXmPVaRBoXOlyBb3MC+J0A66x97qEfLOMkn3u6nfY5esWogQwi/K0BjASYy4DbnsEWnpNL6qT5Mw==",
       "dev": true
     },
-    "@babel/runtime": {
-      "version": "7.9.2",
-      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.9.2.tgz",
-      "integrity": "sha512-NE2DtOdufG7R5vnfQUTehdTfNycfUANEtCa9PssN9O/xmTzP4E08UI797ixaei6hBEVL9BI/PsdJS5x7mWoB9Q==",
-      "dev": true,
-      "requires": {
-        "regenerator-runtime": "^0.13.4"
-      }
-    },
     "@babel/template": {
       "version": "7.8.3",
       "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.8.3.tgz",
@@ -1627,15 +1618,6 @@
         "universal-user-agent": "^4.0.0"
       }
     },
-    "@samverschueren/stream-to-observable": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/@samverschueren/stream-to-observable/-/stream-to-observable-0.3.0.tgz",
-      "integrity": "sha512-MI4Xx6LHs4Webyvi6EbspgyAb4D2Q2VtnCQ1blOJcoLS6mVa8lNN2rkIy1CVxfTUpoyIbCTkXES1rLXztFD1lg==",
-      "dev": true,
-      "requires": {
-        "any-observable": "^0.3.0"
-      }
-    },
     "@types/color-name": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
@@ -1732,9 +1714,9 @@
       }
     },
     "abab": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.2.tgz",
-      "integrity": "sha512-2scffjvioEmNz0OyDSLGWDfKCVwaKc6l9Pm9kOIREU13ClXZvHpg/nRL5xyjSSSLhOnXqft2HpsAzNEEA8cFFg==",
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.3.tgz",
+      "integrity": "sha512-tsFzPpcttalNjFBCFMqsKYQcWxxen1pgJR56by//QwvJc4/OUS3kPOOttx2tSIfjsylB0pYu7f5D3K1RCxUnUg==",
       "dev": true
     },
     "abbrev": {
@@ -1766,13 +1748,21 @@
       "dev": true
     },
     "acorn-globals": {
-      "version": "4.3.4",
-      "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-4.3.4.tgz",
-      "integrity": "sha512-clfQEh21R+D0leSbUdWf3OcfqyaCSAQ8Ryq00bofSekfr9W8u1jyYZo6ir0xu9Gtcf7BjcHJpnbZH7JOCpP60A==",
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-6.0.0.tgz",
+      "integrity": "sha512-ZQl7LOWaF5ePqqcX4hLuv/bLXYQNfNWw2c0/yX/TsPRKamzHcTGQnlCjHT3TsmkOUVEPS3crCxiPfdzE/Trlhg==",
       "dev": true,
       "requires": {
-        "acorn": "^6.0.1",
-        "acorn-walk": "^6.0.1"
+        "acorn": "^7.1.1",
+        "acorn-walk": "^7.1.1"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "7.2.0",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.2.0.tgz",
+          "integrity": "sha512-apwXVmYVpQ34m/i71vrApRrRKCWQnZZF1+npOD0WV5xZFfwWOmKGQ2RWlfdy9vWITsenisM8M0Qeq8agcFHNiQ==",
+          "dev": true
+        }
       }
     },
     "acorn-jsx": {
@@ -1782,9 +1772,9 @@
       "dev": true
     },
     "acorn-walk": {
-      "version": "6.2.0",
-      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-6.2.0.tgz",
-      "integrity": "sha512-7evsyfH1cLOCdAzZAd43Cic04yKydNx0cF+7tiA19p1XnLLPU4dpCQOqpjqwokFe//vS0QqfqqjCS2JkiIs0cA==",
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-7.1.1.tgz",
+      "integrity": "sha512-wdlPY2tm/9XBr7QkKlq0WQVgiuGTX6YWPyRyBviSoScBuLfTVQhvwg6wJ369GJ/1nPfTLMfnrFIfjqVg6d+jQQ==",
       "dev": true
     },
     "add-stream": {
@@ -1811,6 +1801,24 @@
         "humanize-ms": "^1.2.1"
       }
     },
+    "aggregate-error": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/aggregate-error/-/aggregate-error-3.0.1.tgz",
+      "integrity": "sha512-quoaXsZ9/BLNae5yiNoUz+Nhkwz83GhWwtYFglcjEQB2NDHCIpApbqXxIFnm4Pq/Nvhrsq5sYJFyohrrxnTGAA==",
+      "dev": true,
+      "requires": {
+        "clean-stack": "^2.0.0",
+        "indent-string": "^4.0.0"
+      },
+      "dependencies": {
+        "indent-string": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/indent-string/-/indent-string-4.0.0.tgz",
+          "integrity": "sha512-EdDDZu4A2OyIK7Lr/2zG+w5jmbuk1DVBnEwREQvBzspBJkCEbRa8GxU1lghYcaGJCnRWibjDXlq779X1/y5xwg==",
+          "dev": true
+        }
+      }
+    },
     "ajv": {
       "version": "6.10.2",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
@@ -1835,6 +1843,12 @@
       "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
       "dev": true
     },
+    "ansi-colors": {
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.2.4.tgz",
+      "integrity": "sha512-hHUXGagefjN2iRrID63xckIvotOXOojhQKWIPUZ4mNUZ9nLZW+7FMNoE1lOkEhNWYsx/7ysGIuJYCiMAA9FnrA==",
+      "dev": true
+    },
     "ansi-escapes": {
       "version": "3.2.0",
       "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-3.2.0.tgz",
@@ -1856,12 +1870,6 @@
         "color-convert": "^1.9.0"
       }
     },
-    "any-observable": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/any-observable/-/any-observable-0.3.0.tgz",
-      "integrity": "sha512-/FQM1EDkTsf63Ub2C6O7GuYFDsSXUwsaZDurV0np41ocwq0jthUAYCmhBX9f+KwlaCgIuWyr/4WlUQUBfKfZog==",
-      "dev": true
-    },
     "any-promise": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
@@ -1989,12 +1997,6 @@
       "integrity": "sha512-KbUpJgx909ZscOc/7CLATBFam7P1Z1QRQInvgT0UztM9Q72aGKCunKASAl7WNW0tnPmPyEMeMhdsfWhfmW037w==",
       "dev": true
     },
-    "array-equal": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/array-equal/-/array-equal-1.0.0.tgz",
-      "integrity": "sha1-jCpe8kcv2ep0KwTHenUJO6J1fJM=",
-      "dev": true
-    },
     "array-find-index": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/array-find-index/-/array-find-index-1.0.2.tgz",
@@ -2267,12 +2269,6 @@
       "integrity": "sha512-z/WhQ5FPySLdvREByI2vZiTWwCnF0moMJ1hK9YQwDTHKh6I7/uSckMetoRGb5UBZPC1z0jlw+n/XCgjeH7y1AQ==",
       "dev": true
     },
-    "async-limiter": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.1.tgz",
-      "integrity": "sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ==",
-      "dev": true
-    },
     "async-to-gen": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/async-to-gen/-/async-to-gen-1.4.0.tgz",
@@ -2509,9 +2505,9 @@
       }
     },
     "browser-process-hrtime": {
-      "version": "0.1.3",
-      "resolved": "https://registry.npmjs.org/browser-process-hrtime/-/browser-process-hrtime-0.1.3.tgz",
-      "integrity": "sha512-bRFnI4NnjO6cnyLmOV/7PVoDEMJChlcfN0z4s1YMBY989/SvlfMI1lgCnkFUs53e9gQF+w7qu7XdllSTiSl8Aw==",
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/browser-process-hrtime/-/browser-process-hrtime-1.0.0.tgz",
+      "integrity": "sha512-9o5UecI3GhkpM6DrXr69PblIuWxPKk9Y0jHBRhdocZ2y7YECBFCsHm79Pr3OyR2AvjhDkabFJaDJMYRazHgsow==",
       "dev": true
     },
     "browser-stdout": {
@@ -2612,6 +2608,12 @@
       "integrity": "sha512-/XuKeqWocKsYa/cBY1YbSJSWWqTi4cFgr9S6OyM7PBaPbr9zvNGwWP33vt0uqGhwDdN+y3yhbXVILEUpnwEWGw==",
       "dev": true
     },
+    "bytes": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.0.0.tgz",
+      "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg=",
+      "dev": true
+    },
     "cacache": {
       "version": "12.0.3",
       "resolved": "https://registry.npmjs.org/cacache/-/cacache-12.0.3.tgz",
@@ -2837,6 +2839,12 @@
         }
       }
     },
+    "clean-stack": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/clean-stack/-/clean-stack-2.2.0.tgz",
+      "integrity": "sha512-4diC9HaTE+KRAMWhDhrGOECgWZxoevMc5TlkObMqNSsVU62PYzXZ/SMTjzyGAFF1YusgxGcSWTEXBhp0CPwQ1A==",
+      "dev": true
+    },
     "cli-cursor": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-2.1.0.tgz",
@@ -3001,12 +3009,6 @@
         "simple-swizzle": "^0.2.2"
       }
     },
-    "colors": {
-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/colors/-/colors-1.4.0.tgz",
-      "integrity": "sha512-a+UqTh4kgZg/SlGvfbzDHpgRu7AAQOmmqRHJnxhRZICKFUT91brVhNNt58CMWU9PsBbv3PDCZUHbVxuDiH2mtA==",
-      "dev": true
-    },
     "columnify": {
       "version": "1.5.4",
       "resolved": "https://registry.npmjs.org/columnify/-/columnify-1.5.4.tgz",
@@ -3172,6 +3174,12 @@
       "integrity": "sha1-/ozxhP9mcLa67wGp1IYaXL7EEgo=",
       "dev": true
     },
+    "content-disposition": {
+      "version": "0.5.2",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.2.tgz",
+      "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ=",
+      "dev": true
+    },
     "conventional-changelog": {
       "version": "3.1.12",
       "resolved": "https://registry.npmjs.org/conventional-changelog/-/conventional-changelog-3.1.12.tgz",
@@ -3448,16 +3456,6 @@
       "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
       "dev": true
     },
-    "cors": {
-      "version": "2.8.5",
-      "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.5.tgz",
-      "integrity": "sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==",
-      "dev": true,
-      "requires": {
-        "object-assign": "^4",
-        "vary": "^1"
-      }
-    },
     "cosmiconfig": {
       "version": "5.2.1",
       "resolved": "https://registry.npmjs.org/cosmiconfig/-/cosmiconfig-5.2.1.tgz",
@@ -3692,18 +3690,26 @@
       }
     },
     "cssom": {
-      "version": "0.3.8",
-      "resolved": "https://registry.npmjs.org/cssom/-/cssom-0.3.8.tgz",
-      "integrity": "sha512-b0tGHbfegbhPJpxpiBPU2sCkigAqtM9O121le6bbOlgyV+NyGyCmVfJ6QW9eRjz8CpNfWEOYBIMIGRYkLwsIYg==",
+      "version": "0.4.4",
+      "resolved": "https://registry.npmjs.org/cssom/-/cssom-0.4.4.tgz",
+      "integrity": "sha512-p3pvU7r1MyyqbTk+WbNJIgJjG2VmTIaB10rI93LzVPrmDJKkzKYMtxxyAvQXR/NS6otuzveI7+7BBq3SjBS2mw==",
       "dev": true
     },
     "cssstyle": {
-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/cssstyle/-/cssstyle-1.4.0.tgz",
-      "integrity": "sha512-GBrLZYZ4X4x6/QEoBnIrqb8B/f5l4+8me2dkom/j1Gtbxy0kBv6OGzKuAsGM75bkGwGAFkt56Iwg28S3XTZgSA==",
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/cssstyle/-/cssstyle-2.3.0.tgz",
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+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-2.1.2.tgz",
+      "integrity": "sha512-rs9OggEUF0V4jUSecXazOYsLfu7OGK2qIn3c7IPBiffz32XniEp/TX9Xmc9LQfK2nQ2QKHvZ2oygKUGU0lG4jQ==",
+      "dev": true
+    },
+    "serve-handler": {
+      "version": "6.1.2",
+      "resolved": "https://registry.npmjs.org/serve-handler/-/serve-handler-6.1.2.tgz",
+      "integrity": "sha512-RFh49wX7zJmmOVDcIjiDSJnMH+ItQEvyuYLYuDBVoA/xmQSCuj+uRmk1cmBB5QQlI3qOiWKp6p4DUGY+Z5AB2A==",
       "dev": true,
       "requires": {
-        "debug": "2.6.9",
-        "depd": "~1.1.2",
-        "destroy": "~1.0.4",
-        "encodeurl": "~1.0.2",
-        "escape-html": "~1.0.3",
-        "etag": "~1.8.1",
-        "fresh": "0.5.2",
-        "http-errors": "~1.7.2",
-        "mime": "1.6.0",
-        "ms": "2.1.1",
-        "on-finished": "~2.3.0",
-        "range-parser": "~1.2.1",
-        "statuses": "~1.5.0"
+        "bytes": "3.0.0",
+        "content-disposition": "0.5.2",
+        "fast-url-parser": "1.1.3",
+        "mime-types": "2.1.18",
+        "minimatch": "3.0.4",
+        "path-is-inside": "1.0.2",
+        "path-to-regexp": "2.2.1",
+        "range-parser": "1.2.0"
       },
       "dependencies": {
-        "debug": {
-          "version": "2.6.9",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
-          "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+        "mime-db": {
+          "version": "1.33.0",
+          "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.33.0.tgz",
+          "integrity": "sha512-BHJ/EKruNIqJf/QahvxwQZXKygOQ256myeN/Ew+THcAa5q+PjyTTMMeNQC4DZw5AwfvelsUrA6B67NKMqXDbzQ==",
+          "dev": true
+        },
+        "mime-types": {
+          "version": "2.1.18",
+          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.18.tgz",
+          "integrity": "sha512-lc/aahn+t4/SWV/qcmumYjymLsWfN3ELhpmVuUFjgsORruuZPVSwAQryq+HHGvO/SI2KVX26bx+En+zhM8g8hQ==",
           "dev": true,
           "requires": {
-            "ms": "2.0.0"
-          },
-          "dependencies": {
-            "ms": {
-              "version": "2.0.0",
-              "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-              "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
-              "dev": true
-            }
+            "mime-db": "~1.33.0"
           }
         },
-        "ms": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
-          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==",
+        "range-parser": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.0.tgz",
+          "integrity": "sha1-9JvmtIeJTdxA3MlKMi9hEJLgDV4=",
           "dev": true
         }
       }
     },
-    "serialize-javascript": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-2.1.2.tgz",
-      "integrity": "sha512-rs9OggEUF0V4jUSecXazOYsLfu7OGK2qIn3c7IPBiffz32XniEp/TX9Xmc9LQfK2nQ2QKHvZ2oygKUGU0lG4jQ==",
-      "dev": true
-    },
     "serve-index": {
       "version": "1.9.1",
       "resolved": "https://registry.npmjs.org/serve-index/-/serve-index-1.9.1.tgz",
@@ -12909,12 +12856,6 @@
         "util.promisify": "~1.0.0"
       }
     },
-    "symbol-observable": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/symbol-observable/-/symbol-observable-1.2.0.tgz",
-      "integrity": "sha512-e900nM8RRtGhlV36KGEU9k65K3mPb1WV70OdjfxlG2EAuM1noi/E/BaW/uMhL7bPEssK8QV57vN3esixjUvcXQ==",
-      "dev": true
-    },
     "symbol-tree": {
       "version": "3.2.4",
       "resolved": "https://registry.npmjs.org/symbol-tree/-/symbol-tree-3.2.4.tgz",
@@ -13558,22 +13499,20 @@
       "dev": true
     },
     "w3c-hr-time": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/w3c-hr-time/-/w3c-hr-time-1.0.1.tgz",
-      "integrity": "sha1-gqwr/2PZUOqeMYmlimViX+3xkEU=",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/w3c-hr-time/-/w3c-hr-time-1.0.2.tgz",
+      "integrity": "sha512-z8P5DvDNjKDoFIHK7q8r8lackT6l+jo/Ye3HOle7l9nICP9lf1Ci25fy9vHd0JOWewkIFzXIEig3TdKT7JQ5fQ==",
       "dev": true,
       "requires": {
-        "browser-process-hrtime": "^0.1.2"
+        "browser-process-hrtime": "^1.0.0"
       }
     },
     "w3c-xmlserializer": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-1.1.2.tgz",
-      "integrity": "sha512-p10l/ayESzrBMYWRID6xbuCKh2Fp77+sA0doRuGn4tTIMrrZVeqfpKjXHY+oDh3K4nLdPgNwMTVP6Vp4pvqbNg==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-2.0.0.tgz",
+      "integrity": "sha512-4tzD0mF8iSiMiNs30BiLO3EpfGLZUT2MSX/G+o7ZywDzliWQ3OPtTZ0PTC3B3ca1UAf4cJMHB+2Bf56EriJuRA==",
       "dev": true,
       "requires": {
-        "domexception": "^1.0.1",
-        "webidl-conversions": "^4.0.2",
         "xml-name-validator": "^3.0.0"
       }
     },
@@ -13908,13 +13847,10 @@
       }
     },
     "ws": {
-      "version": "7.1.2",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-7.1.2.tgz",
-      "integrity": "sha512-gftXq3XI81cJCgkUiAVixA0raD9IVmXqsylCrjRygw4+UOOGzPoxnQ6r/CnVL9i+mDncJo94tSkyrtuuQVBmrg==",
-      "dev": true,
-      "requires": {
-        "async-limiter": "^1.0.0"
-      }
+      "version": "7.3.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.3.0.tgz",
+      "integrity": "sha512-iFtXzngZVXPGgpTlP1rBqsUK82p9tKqsWRPg5L56egiljujJT3vGAYnHANvFxBieXrTFavhzhxW52jnaWV+w2w==",
+      "dev": true
     },
     "xml-name-validator": {
       "version": "3.0.0",
@@ -13959,13 +13895,10 @@
       "dev": true
     },
     "yaml": {
-      "version": "1.8.3",
-      "resolved": "https://registry.npmjs.org/yaml/-/yaml-1.8.3.tgz",
-      "integrity": "sha512-X/v7VDnK+sxbQ2Imq4Jt2PRUsRsP7UcpSl3Llg6+NRRqWLIvxkMFYtH1FmvwNGYRKKPa+EPA4qDBlI9WVG1UKw==",
-      "dev": true,
-      "requires": {
-        "@babel/runtime": "^7.8.7"
-      }
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-1.10.0.tgz",
+      "integrity": "sha512-yr2icI4glYaNG+KWONODapy2/jDdMSDnrONSjblABjD9B4Z5LgiircSt8m8sRZFNi08kG9Sm0uSHtEmP3zaEGg==",
+      "dev": true
     },
     "yargs": {
       "version": "12.0.5",
diff --git a/package.json b/package.json
index 9e0b0a115..d908b27eb 100644
--- a/package.json
+++ b/package.json
@@ -81,7 +81,7 @@
     "eslint-plugin-prettier": "^3.1.2",
     "esm": "^3.1.4",
     "husky": "^3.1.0",
-    "jsdom": "^15.1.1",
+    "jsdom": "^16.2.2",
     "lerna": "^3.17.0",
     "lint-staged": "^10.1.2",
     "live-server": "^1.2.1",
@@ -97,6 +97,7 @@
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-replace": "^2.2.0",
     "rollup-plugin-uglify": "^6.0.4",
+    "serve-handler": "^6.1.2",
     "start-server-and-test": "^1.10.6",
     "stylus": "^0.54.5"
   },
diff --git a/src/core/Docsify.js b/src/core/Docsify.js
new file mode 100644
index 000000000..fcb40336b
--- /dev/null
+++ b/src/core/Docsify.js
@@ -0,0 +1,23 @@
+import { initMixin } from './init';
+import { routerMixin } from './router';
+import { renderMixin } from './render';
+import { fetchMixin } from './fetch';
+import { eventMixin } from './event';
+import initGlobalAPI from './global-api';
+
+export function Docsify() {
+  this._init();
+}
+
+const proto = Docsify.prototype;
+
+initMixin(proto);
+routerMixin(proto);
+renderMixin(proto);
+fetchMixin(proto);
+eventMixin(proto);
+
+/**
+ * Global API
+ */
+initGlobalAPI();
diff --git a/src/core/config.js b/src/core/config.js
index f3413a778..2d23f5db2 100644
--- a/src/core/config.js
+++ b/src/core/config.js
@@ -2,7 +2,7 @@ import { merge, hyphenate, isPrimitive, hasOwn } from './util/core';
 
 const currentScript = document.currentScript;
 
-export default function() {
+export default function(vm) {
   const config = merge(
     {
       el: '#app',
@@ -36,7 +36,9 @@ export default function() {
       relativePath: false,
       topMargin: 0,
     },
-    window.$docsify
+    typeof window.$docsify === 'function'
+      ? window.$docsify(vm)
+      : window.$docsify
   );
 
   const script =
diff --git a/src/core/global-api.js b/src/core/global-api.js
index 189309af0..a5f69f6f8 100644
--- a/src/core/global-api.js
+++ b/src/core/global-api.js
@@ -6,6 +6,10 @@ import { Compiler } from './render/compiler';
 import { slugify } from './render/slugify';
 import { get } from './fetch/ajax';
 
+// TODO This is deprecated, kept for backwards compatibility. Remove in next
+// major release. We'll tell people to get everything from the DOCSIFY global
+// when using the global build, but we'll highly recommend for them to import
+// from the ESM build (f.e. lib/docsify.esm.js and lib/docsify.min.esm.js).
 export default function() {
   window.Docsify = {
     util,
diff --git a/src/core/index.js b/src/core/index.js
index 14f5d9422..6e6164186 100644
--- a/src/core/index.js
+++ b/src/core/index.js
@@ -1,45 +1,8 @@
-import { initMixin } from './init';
-import { routerMixin } from './router';
-import { renderMixin } from './render';
-import { fetchMixin } from './fetch';
-import { eventMixin } from './event';
-import initGlobalAPI from './global-api';
-
-/**
- * Fork https://github.com/bendrucker/document-ready/blob/master/index.js
- * @param {Function} callback The callbacack to be called when the page is loaded
- * @returns {Number|void} If the page is already laoded returns the result of the setTimeout callback,
- *  otherwise it only attaches the callback to the DOMContentLoaded event
- */
-function ready(callback) {
-  const state = document.readyState;
-
-  if (state === 'complete' || state === 'interactive') {
-    return setTimeout(callback, 0);
-  }
-
-  document.addEventListener('DOMContentLoaded', callback);
-}
-
-function Docsify() {
-  this._init();
-}
-
-const proto = Docsify.prototype;
-
-initMixin(proto);
-routerMixin(proto);
-renderMixin(proto);
-fetchMixin(proto);
-eventMixin(proto);
-
-/**
- * Global API
- */
-initGlobalAPI();
+import { documentReady } from './util/dom';
+import { Docsify } from './Docsify';
 
 /**
  * Run Docsify
  */
 // eslint-disable-next-line no-unused-vars
-ready(_ => new Docsify());
+documentReady(_ => new Docsify());
diff --git a/src/core/init/index.js b/src/core/init/index.js
index 9231acc1d..255aad06c 100644
--- a/src/core/init/index.js
+++ b/src/core/init/index.js
@@ -9,7 +9,7 @@ import { initLifecycle, callHook } from './lifecycle';
 export function initMixin(proto) {
   proto._init = function() {
     const vm = this;
-    vm.config = config();
+    vm.config = config(vm);
 
     initLifecycle(vm); // Init hooks
     initPlugin(vm); // Install plugins
diff --git a/src/core/util/dom.js b/src/core/util/dom.js
index b17628636..c0eb9831e 100644
--- a/src/core/util/dom.js
+++ b/src/core/util/dom.js
@@ -101,3 +101,19 @@ export function toggleClass(el, type, val) {
 export function style(content) {
   appendTo(head, create('style', content));
 }
+
+/**
+ * Fork https://github.com/bendrucker/document-ready/blob/master/index.js
+ * @param {Function} callback The callbacack to be called when the page is loaded
+ * @returns {Number|void} If the page is already laoded returns the result of the setTimeout callback,
+ *  otherwise it only attaches the callback to the DOMContentLoaded event
+ */
+export function documentReady(callback, doc = document) {
+  const state = doc.readyState;
+
+  if (state === 'complete' || state === 'interactive') {
+    return setTimeout(callback, 0);
+  }
+
+  doc.addEventListener('DOMContentLoaded', callback);
+}
diff --git a/test/_helper.js b/test/_helper.js
index afd0c07fd..39ee5bdb1 100644
--- a/test/_helper.js
+++ b/test/_helper.js
@@ -19,6 +19,21 @@ function ready(callback) {
   document.addEventListener('DOMContentLoaded', callback);
 }
 
+module.exports.initJSDOM = initJSDOM;
+
+/** @param {string} markup - The HTML document to initialize JSDOM with. */
+function initJSDOM(markup, options = {}) {
+  const dom = new JSDOM(markup, options);
+
+  global.window = dom.window;
+  global.document = dom.window.document;
+  global.navigator = dom.window.navigator;
+  global.location = dom.window.location;
+  global.XMLHttpRequest = dom.window.XMLHttpRequest;
+
+  return dom;
+}
+
 module.exports.init = function(
   fixture = 'default',
   config = {},
@@ -39,15 +54,9 @@ module.exports.init = function(
 
   const rootPath = path.join(__dirname, 'fixtures', fixture);
 
-  const dom = new JSDOM(markup);
+  const dom = initJSDOM(markup);
   dom.reconfigure({ url: 'file:///' + rootPath });
 
-  global.window = dom.window;
-  global.document = dom.window.document;
-  global.navigator = dom.window.navigator;
-  global.location = dom.window.location;
-  global.XMLHttpRequest = dom.window.XMLHttpRequest;
-
   // Mimic src/core/index.js but for Node.js
   function Docsify() {
     this._init();
diff --git a/test/unit/docsify.test.js b/test/unit/docsify.test.js
new file mode 100644
index 000000000..8f095c849
--- /dev/null
+++ b/test/unit/docsify.test.js
@@ -0,0 +1,134 @@
+/* global before after */
+/* eslint-disable no-global-assign */
+require = require('esm')(module /* , options */);
+
+const http = require('http');
+const handler = require('serve-handler');
+const { expect } = require('chai');
+const { initJSDOM } = require('../_helper');
+
+const port = 9753;
+const docsifySite = 'http://127.0.0.1:' + port;
+
+const markup = /* html */ `<!DOCTYPE html>
+  <html>
+    <head></head>
+    <body>
+      <div id="app"></div>
+      <script src="/lib/docsify.js"></script>
+    </body>
+  </html>
+`;
+
+/** @type {ReturnType<typeof http.createServer>} */
+let server;
+
+describe('Docsify public API', () => {
+  before(async () => {
+    server = http.createServer((request, response) => {
+      // You pass two more arguments for config and middleware
+      // More details here: https://github.com/zeit/serve-handler#options
+      return handler(request, response);
+    });
+
+    await new Promise(r => server.listen(port, r));
+  });
+
+  after(async () => {
+    server.close(err => {
+      if (err) {
+        console.error(err); // eslint-disable-line
+        process.exit(1);
+      }
+      // eslint-disable-next-line
+      console.log('Server closed.');
+    });
+  });
+
+  it('global APIs are available', async () => {
+    // const DOM = new (require('jsdom').JSDOM)(markup, {
+    const DOM = initJSDOM(markup, {
+      url: docsifySite,
+      runScripts: 'dangerously',
+      resources: 'usable',
+    });
+
+    const { documentReady } = require('../../src/core/util/dom');
+    await new Promise(resolve => documentReady(resolve, DOM.window.document));
+
+    // If the script was built successfully for production, then it should load
+    // and the following APIs should be available:
+    expect(typeof DOM.window.Docsify).to.equal('object');
+    expect(typeof DOM.window.Docsify.util).to.equal('object');
+    expect(typeof DOM.window.Docsify.dom).to.equal('object');
+    expect(typeof DOM.window.Docsify.get).to.equal('function');
+    expect(typeof DOM.window.Docsify.slugify).to.equal('function');
+    expect(typeof DOM.window.Docsify.version).to.equal('string');
+    expect(typeof DOM.window.DocsifyCompiler).to.equal('function');
+    expect(typeof DOM.window.marked).to.equal('function');
+    expect(typeof DOM.window.Prism).to.equal('object');
+  });
+
+  describe('Docsify config function', function() {
+    it('allows $docsify to be a function', async function() {
+      initJSDOM(markup, { url: docsifySite });
+
+      window.configFunctionCalled = false;
+
+      window.$docsify = function(vm) {
+        // Check public API (that which is available at this point)
+        expect(vm).to.be.an.instanceof(Object);
+        expect(vm.constructor.name).to.equal('Docsify');
+        expect(vm.$fetch).to.be.an.instanceof(Function);
+        expect(vm.$resetEvents).to.be.an.instanceof(Function);
+        expect(vm.route).to.be.an.instanceof(Object);
+
+        window.configFunctionCalled = true;
+
+        return {};
+      };
+
+      const { documentReady } = require('../../src/core/util/dom');
+      const { Docsify } = require('../../src/core/Docsify');
+      await new Promise(resolve => documentReady(resolve));
+
+      new Docsify(); // eslint-disable-line
+
+      expect(window.configFunctionCalled).to.equal(true);
+    });
+
+    it('provides the hooks and vm API to plugins', async function() {
+      initJSDOM(markup, { url: docsifySite });
+
+      window.pluginFunctionCalled = false;
+
+      window.$docsify = function(vm) {
+        const vm1 = vm;
+        return {
+          plugins: [
+            function(hook, vm2) {
+              expect(vm1).to.equal(vm2);
+
+              expect(hook.init).to.be.an.instanceof(Function);
+              expect(hook.beforeEach).to.be.an.instanceof(Function);
+              expect(hook.afterEach).to.be.an.instanceof(Function);
+              expect(hook.doneEach).to.be.an.instanceof(Function);
+              expect(hook.mounted).to.be.an.instanceof(Function);
+              expect(hook.ready).to.be.an.instanceof(Function);
+
+              window.pluginFunctionCalled = true;
+            },
+          ],
+        };
+      };
+
+      const { documentReady } = require('../../src/core/util/dom');
+      const { Docsify } = require('../../src/core/Docsify');
+      await new Promise(resolve => documentReady(resolve));
+
+      new Docsify(); // eslint-disable-line
+
+      expect(window.pluginFunctionCalled).to.equal(true);
+    });
+  });
+});