diff --git a/src/plugins/search/component.js b/src/plugins/search/component.js
index 3b349919e..94b7ecce5 100644
--- a/src/plugins/search/component.js
+++ b/src/plugins/search/component.js
@@ -91,6 +91,7 @@ function bindEvents () {
     if (!value) {
       $panel.classList.remove('show')
       $panel.innerHTML = ''
+      return
     }
     const matchs = search(value)
 
diff --git a/src/plugins/search/index.js b/src/plugins/search/index.js
index ea95fdc3b..e1962793f 100644
--- a/src/plugins/search/index.js
+++ b/src/plugins/search/index.js
@@ -9,7 +9,7 @@ const CONFIG = {
 
 const install = function (hook, vm) {
   const util = Docsify.util
-  const opts = vm.config.search
+  const opts = vm.config.search || CONFIG
 
   if (Array.isArray(opts)) {
     CONFIG.paths = opts
@@ -23,11 +23,11 @@ const install = function (hook, vm) {
 
   hook.mounted(_ => {
     initComponet(CONFIG)
-    isAuto && initSearch(CONFIG, vm)
+    !isAuto && initSearch(CONFIG, vm)
   })
   hook.doneEach(_ => {
     updateComponent(CONFIG, vm)
-    !isAuto && initSearch(CONFIG, vm)
+    isAuto && initSearch(CONFIG, vm)
   })
 }
 
diff --git a/src/plugins/search/search.js b/src/plugins/search/search.js
index 627f043c2..1b18f44d3 100644
--- a/src/plugins/search/search.js
+++ b/src/plugins/search/search.js
@@ -52,7 +52,7 @@ export function genIndex (path, content = '') {
         INDEXS[slug] = { slug, title: '', body: '' }
       } else {
         if (INDEXS[slug].body) {
-          INDEXS[slug].body += ('\n' + token.text)
+          INDEXS[slug].body += '\n' + (token.text || '')
         } else {
           INDEXS[slug].body = token.text
         }