allow the user's $docsify config to be a function that receives as input the Docsify instance

Author: trusktr

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',
@@ -35,7 +35,9 @@ export default function() {
       relativePath: false,
       topMargin: 0,
     },
-    window.$docsify
+    typeof window.$docsify === 'function'
+      ? window.$docsify(vm)
+      : window.$docsify
   );
 
   const script =

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