diff --git a/package.json b/package.json
index 0a26ee2..417a7c9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hexo-theme-butterfly",
-  "version": "3.4.0-b6",
+  "version": "3.4.0",
   "description": "A Simple and Card UI Design theme for Hexo",
   "main": "package.json",
   "scripts": {
diff --git a/source/img/icp.png b/source/img/icp.png
deleted file mode 100644
index 3b5539d..0000000
Binary files a/source/img/icp.png and /dev/null differ
diff --git a/source/js/main.js b/source/js/main.js
index ccac18a..565749c 100644
--- a/source/js/main.js
+++ b/source/js/main.js
@@ -383,9 +383,7 @@ document.addEventListener('DOMContentLoaded', function () {
       const contentMath = (docHeight > winHeight) ? (docHeight - winHeight) : (document.documentElement.scrollHeight - winHeight)
       const scrollPercent = (currentTop - headerHeight) / (contentMath)
       const scrollPercentRounded = Math.round(scrollPercent * 100)
-      const percentage = (scrollPercentRounded > 100) ? 100
-        : (scrollPercentRounded <= 0) ? 0
-          : scrollPercentRounded
+      const percentage = (scrollPercentRounded > 100) ? 100 : (scrollPercentRounded <= 0) ? 0 : scrollPercentRounded
       $cardToc.setAttribute('progress-percentage', percentage)
     }
 
@@ -687,7 +685,7 @@ document.addEventListener('DOMContentLoaded', function () {
 
           if (!$tabItem.classList.contains('active')) {
             const $tabContent = $tabItem.parentNode.nextElementSibling
-            btf.siblings($tabItem, 'active')[0].classList.remove('active')
+            btf.siblings($tabItem, '.active')[0].classList.remove('active')
             $tabItem.classList.add('active')
             const tabId = $this.getAttribute('data-href').replace('#', '')
             const childList = [...$tabContent.children]
@@ -753,7 +751,7 @@ document.addEventListener('DOMContentLoaded', function () {
 
   const addPostOutdateNotice = function () {
     const data = GLOBAL_CONFIG.noticeOutdate
-    var diffDay = btf.diffDate(GLOBAL_CONFIG_SITE.postUpdate)
+    const diffDay = btf.diffDate(GLOBAL_CONFIG_SITE.postUpdate)
     if (diffDay >= data.limitDay) {
       const ele = document.createElement('div')
       ele.className = 'post-outdate-notice'
diff --git a/source/js/utils.js b/source/js/utils.js
index a1cdf4c..b53e48a 100644
--- a/source/js/utils.js
+++ b/source/js/utils.js
@@ -1,4 +1,4 @@
-var btf = {
+const btf = {
   debounce: function (func, wait, immediate) {
     let timeout
     return function () {
@@ -140,7 +140,7 @@ var btf = {
       return
     }
 
-    var currentPos = window.scrollY || window.screenTop
+    const currentPos = window.scrollY || window.screenTop
     if (currentPos > pos) pos = pos - 70
 
     if ('CSS' in window && CSS.supports('scroll-behavior', 'smooth')) {
@@ -151,7 +151,7 @@ var btf = {
       return
     }
 
-    var start = null
+    let start = null
     time = time || 500
     window.requestAnimationFrame(function step (currentTime) {
       start = !start ? currentTime : start
@@ -188,38 +188,18 @@ var btf = {
   },
 
   getParents: (elem, selector) => {
-    // polyfill
-    if (!Element.prototype.matches) {
-      Element.prototype.matches =
-          Element.prototype.matchesSelector ||
-          Element.prototype.mozMatchesSelector ||
-          Element.prototype.msMatchesSelector ||
-          Element.prototype.oMatchesSelector ||
-          Element.prototype.webkitMatchesSelector ||
-          function (s) {
-            const matches = (this.document || this.ownerDocument).querySelectorAll(s)
-            let i = matches.length
-            while (--i >= 0 && matches.item(i) !== this) {}
-            return i > -1
-          }
-    }
-
     for (; elem && elem !== document; elem = elem.parentNode) {
       if (elem.matches(selector)) return elem
     }
     return null
   },
 
-  /**
-   *
-   * @param {*} ele
-   * @param {*} selector class name
-   */
   siblings: (ele, selector) => {
     return [...ele.parentNode.children].filter((child) => {
       if (selector) {
-        return child !== ele && child.classList.contains(selector)
+        return child !== ele && child.matches(selector)
       }
+      return child !== ele
     })
   },
 
@@ -230,7 +210,7 @@ var btf = {
    * @param {*} id id
    * @param {*} cn class name
    */
-  wrap: function (selector, eleType, id = null, cn = null) {
+  wrap: function (selector, eleType, id = '', cn = '') {
     const creatEle = document.createElement(eleType)
     if (id) creatEle.id = id
     if (cn) creatEle.className = cn