diff --git a/layout/_partial/scripts.ejs b/layout/_partial/scripts.ejs
index cc5b018..05e24ef 100755
--- a/layout/_partial/scripts.ejs
+++ b/layout/_partial/scripts.ejs
@@ -23,7 +23,7 @@
 <script src="//instant.page/1.2.2" type="module" integrity="sha384-2xV8M5griQmzyiY3CDqh1dn4z3llDVqZDqzjzcY+jCBCk/a5fXJmuZ/40JJAPeoU"></script>
 
 <% if (theme.scrollreveal == true) { %>
-  <script async src="https://cdn.jsdelivr.net/npm/scrollreveal@4.0.5/dist/scrollreveal.min.js"></script>
+  <script src="https://cdn.jsdelivr.net/npm/scrollreveal@4.0.5/dist/scrollreveal.min.js"></script>
   <script type="text/javascript">
     $(function() {
       const $reveal = $('.reveal');
diff --git a/source/js/app.js b/source/js/app.js
index 499c7ae..92bb42a 100755
--- a/source/js/app.js
+++ b/source/js/app.js
@@ -12,10 +12,12 @@ var customSearch;
 	function scrolltoElement(elem, correction) {
 		correction = correction || scrollCorrection;
 		const $elem = elem.href ? $(elem.getAttribute('href')) : $(elem);
-		$('html, body').animate({ 'scrollTop': $elem.offset().top - correction }, 400);
-	};
+		$('html, body').animate({
+			'scrollTop': $elem.offset().top - correction
+		}, 400);
+	}
 
-  function setScrollAnchor(){
+	function setScrollAnchor() {
 		// button
 		const $postsBtn = $('.menu .active');
 		const $topBtn = $('.s-top');
@@ -24,13 +26,25 @@ var customSearch;
 		const $bodyAnchor = $('.l_body');
 		// action
 		if ($postsBtn.length && $bodyAnchor) {
-			$postsBtn.click(e => { e.preventDefault(); e.stopPropagation(); scrolltoElement($bodyAnchor); });
+			$postsBtn.click(e => {
+				e.preventDefault();
+				e.stopPropagation();
+				scrolltoElement($bodyAnchor);
+			});
 		}
 		if ($titleBtn.length && $bodyAnchor) {
-			$titleBtn.click(e => { e.preventDefault(); e.stopPropagation(); scrolltoElement($bodyAnchor); });
+			$titleBtn.click(e => {
+				e.preventDefault();
+				e.stopPropagation();
+				scrolltoElement($bodyAnchor);
+			});
 		}
 		if ($topBtn.length && $bodyAnchor) {
-			$topBtn.click(e => { e.preventDefault(); e.stopPropagation(); scrolltoElement($bodyAnchor); });
+			$topBtn.click(e => {
+				e.preventDefault();
+				e.stopPropagation();
+				scrolltoElement($bodyAnchor);
+			});
 		}
 
 		const $coverAnchor = $('.cover-wrapper');
@@ -45,11 +59,11 @@ var customSearch;
 			pos = scrollTop;
 			if (scrollTop > 150) {
 				$topBtn.addClass('show');
-        if (del > 0) {
-          $topBtn.removeClass('hl');
-        } else {
-          $topBtn.addClass('hl');
-        }
+				if (del > 0) {
+					$topBtn.removeClass('hl');
+				} else {
+					$topBtn.addClass('hl');
+				}
 			} else {
 				$topBtn.removeClass('show').removeClass('hl');
 			}
@@ -59,7 +73,7 @@ var customSearch;
 				$headerAnchor.removeClass('show');
 			}
 		});
-  }
+	}
 
 	function setHeader() {
 		if (!window.subData) return;
@@ -84,12 +98,19 @@ var customSearch;
 		// bind events to every btn
 		const $commentTarget = $('#comments');
 		if ($commentTarget.length) {
-			$comment.click(e => { e.preventDefault(); e.stopPropagation(); scrolltoElement($commentTarget); });
+			$comment.click(e => {
+				e.preventDefault();
+				e.stopPropagation();
+				scrolltoElement($commentTarget);
+			});
 		} else $comment.remove();
 
 		const $tocTarget = $('.toc-wrapper');
 		if ($tocTarget.length && $tocTarget.children().length) {
-			$toc.click((e) => { e.stopPropagation(); $tocTarget.toggleClass('active'); });
+			$toc.click((e) => {
+				e.stopPropagation();
+				$tocTarget.toggleClass('active');
+			});
 		} else $toc.remove();
 
 
@@ -97,9 +118,9 @@ var customSearch;
 	}
 
 	function setHeaderMenuSelection() {
-    var $headerMenu = $('body .navgation');
-    // 先把已经激活的取消激活
-    $headerMenu.find('li a.active').removeClass('active');
+		var $headerMenu = $('body .navgation');
+		// 先把已经激活的取消激活
+		$headerMenu.find('li a.active').removeClass('active');
 		// var $underline = $headerMenu.find('.underline');
 		function setUnderline($item) {
 			// if (!transition) $underline.addClass('disable-trans');
@@ -109,20 +130,20 @@ var customSearch;
 		}
 		//set current active nav
 		var $active_link = null;
-    var idname = location.pathname.replace(/\/|%/g, "");
-    if (idname.length == 0) {
-      idname = "home";
-    }
+		var idname = location.pathname.replace(/\/|%/g, "");
+		if (idname.length == 0) {
+			idname = "home";
+		}
 		var page = idname.match(/page\d{0,}$/g);
 		if (page) {
 			page = page[0];
 			idname = idname.split(page)[0];
 		}
-    var index = idname.match(/index.html/);
-    if (index) {
-      index = index[0];
-      idname = idname.split(index)[0];
-    }
+		var index = idname.match(/index.html/);
+		if (index) {
+			index = index[0];
+			idname = idname.split(index)[0];
+		}
 		if (idname && $headerMenu) {
 			$active_link = $('#' + idname, $headerMenu);
 			setUnderline($active_link);
@@ -158,53 +179,53 @@ var customSearch;
 		$search.click(function (e) {
 			e.stopPropagation();
 		});
-    $header.ready(function () {
-      $header.bind('keydown', function (event) {
-        if (event.keyCode == 9) {
-          return false;
-        } else {
-          var isie = (document.all) ? true: false;
-          var key;
-          var ev;
-          if (isie) { //IE浏览器
-            key = window.event.keyCode;
-            ev = window.event;
-          } else { //火狐浏览器
-            key = event.which;
-            ev = event;
-          }
-          if (key == 9) { //IE浏览器
-            if (isie) {
-              ev.keyCode = 0;
-              ev.returnValue = false;
-            } else { //火狐浏览器
-              ev.which = 0;
-              ev.preventDefault();
-            }
-          }
-        }
-      });
-    });
+		$header.ready(function () {
+			$header.bind('keydown', function (event) {
+				if (event.keyCode == 9) {
+					return false;
+				} else {
+					var isie = (document.all) ? true : false;
+					var key;
+					var ev;
+					if (isie) { //IE浏览器
+						key = window.event.keyCode;
+						ev = window.event;
+					} else { //火狐浏览器
+						key = event.which;
+						ev = event;
+					}
+					if (key == 9) { //IE浏览器
+						if (isie) {
+							ev.keyCode = 0;
+							ev.returnValue = false;
+						} else { //火狐浏览器
+							ev.which = 0;
+							ev.preventDefault();
+						}
+					}
+				}
+			});
+		});
 	}
 
 	function setTocToggle() {
 		const $toc = $('.toc-wrapper');
 		if ($toc.length === 0) return;
 		// $toc.click((e) => {
-        //     e.stopPropagation();
-        //     $toc.addClass('active');
-        // });
+		//     e.stopPropagation();
+		//     $toc.addClass('active');
+		// });
 		$(document).click(() => $toc.removeClass('active'));
 
 		$toc.on('click', 'a', (e) => {
 			e.preventDefault();
 			e.stopPropagation();
 			if (e.target.tagName === 'A') {
-        scrolltoElement(e.target);
-      } else if (e.target.tagName === 'SPAN') {
-        scrolltoElement(e.target.parentElement);
-      }
-      $toc.removeClass('active');
+				scrolltoElement(e.target);
+			} else if (e.target.tagName === 'SPAN') {
+				scrolltoElement(e.target.parentElement);
+			}
+			$toc.removeClass('active');
 		});
 
 		const liElements = Array.from($toc.find('li a'));
@@ -216,7 +237,9 @@ var customSearch;
 			const scrollTop = $('html').scrollTop() || $('body').scrollTop();
 			if (!anchor) return;
 			//binary search.
-			let l = 0, r = anchor.length - 1, mid;
+			let l = 0,
+				r = anchor.length - 1,
+				mid;
 			while (l < r) {
 				mid = (l + r + 1) >> 1;
 				if (anchor[mid] === scrollTop) l = r = mid;
@@ -236,57 +259,52 @@ var customSearch;
 		scrollListener();
 	}
 
-
-	$(function () {
-		//set header
-		setHeader();
-		setHeaderMenuSelection();
-		setHeaderMenuPhone();
-		setHeaderSearch();
-
-		setTocToggle();
-    setScrollAnchor();
-		// $(".article .video-container").fitVids();
-
-		setTimeout(function () {
-			$('#loading-bar-wrapper').fadeOut(500);
-		}, 300);
-
+	function setSearchService() {
 		if (SEARCH_SERVICE === 'google') {
 			customSearch = new GoogleCustomSearch({
 				apiKey: GOOGLE_CUSTOM_SEARCH_API_KEY,
 				engineId: GOOGLE_CUSTOM_SEARCH_ENGINE_ID,
 				imagePath: "/img/"
 			});
-		}
-		else if (SEARCH_SERVICE === 'algolia') {
+		} else if (SEARCH_SERVICE === 'algolia') {
 			customSearch = new AlgoliaSearch({
 				apiKey: ALGOLIA_API_KEY,
 				appId: ALGOLIA_APP_ID,
 				indexName: ALGOLIA_INDEX_NAME,
 				imagePath: "/img/"
 			});
-		}
-		else if (SEARCH_SERVICE === 'hexo') {
+		} else if (SEARCH_SERVICE === 'hexo') {
 			customSearch = new HexoSearch({
 				imagePath: "/img/"
 			});
-		}
-		else if (SEARCH_SERVICE === 'azure') {
+		} else if (SEARCH_SERVICE === 'azure') {
 			customSearch = new AzureSearch({
 				serviceName: AZURE_SERVICE_NAME,
 				indexName: AZURE_INDEX_NAME,
 				queryKey: AZURE_QUERY_KEY,
 				imagePath: "/img/"
 			});
-		}
-		else if (SEARCH_SERVICE === 'baidu') {
+		} else if (SEARCH_SERVICE === 'baidu') {
 			customSearch = new BaiduSearch({
 				apiId: BAIDU_API_ID,
 				imagePath: "/img/"
 			});
 		}
+	}
 
+	$(function () {
+		setHeader();
+		setHeaderMenuSelection();
+		setHeaderMenuPhone();
+		setHeaderSearch();
+		setTocToggle();
+		setScrollAnchor();
+		setSearchService();
+		// $(".article .video-container").fitVids();
+
+		setTimeout(function () {
+			$('#loading-bar-wrapper').fadeOut(500);
+		}, 300);
 	});
 
-})(jQuery);
+})(jQuery);
\ No newline at end of file