diff --git a/_javascript/utils/smooth-scroll.js b/_javascript/utils/smooth-scroll.js
index 2d41988..45e84b0 100644
--- a/_javascript/utils/smooth-scroll.js
+++ b/_javascript/utils/smooth-scroll.js
@@ -55,7 +55,6 @@ $(function() {
 
               if ((isAnchor || toFootnoteRef) && isMobileViews) {
                 destOffset -= topbarHeight;
-                console.log(`[smooth] mobile -= topbar height`);
               }
             }
 
diff --git a/assets/js/dist/post.min.js b/assets/js/dist/post.min.js
index 8bf906c..dc25c7c 100644
--- a/assets/js/dist/post.min.js
+++ b/assets/js/dist/post.min.js
@@ -3,4 +3,4 @@
  * © 2019 Cotes Chung
  * MIT Licensed
  */
-$(function(){$(window).scroll(()=>{50<$(this).scrollTop()&&"none"===$("#sidebar-trigger").css("display")?$("#back-to-top").fadeIn():$("#back-to-top").fadeOut()}),$("#back-to-top").click(()=>($("body,html").animate({scrollTop:0},800),!1))}),$(function(){$(".mode-toggle").click(t=>{const e=$(t.target);let o=e.prop("tagName")==="button".toUpperCase()?e:e.parent();o.blur(),flipMode()})}),$(function(){const t=$("#sidebar-trigger"),e=$("#search-trigger"),o=$("#search-cancel"),a=$("#search-cleaner"),n=$("#main"),l=$("#topbar-title"),r=$("#search-wrapper"),s=$("#search-result-wrapper"),i=$("#search-results"),c=$("#search-input"),d=$("#search-hints"),u=function(){let t=0;return{block(){t=window.scrollY,$("html,body").scrollTop(0)},release(){$("html,body").scrollTop(t)},getOffset(){return t}}}(),p={on(){t.addClass("unloaded"),l.addClass("unloaded"),e.addClass("unloaded"),r.addClass("d-flex"),o.addClass("loaded")},off(){o.removeClass("loaded"),r.removeClass("d-flex"),t.removeClass("unloaded"),l.removeClass("unloaded"),e.removeClass("unloaded")}},h=function(){let t=!1;return{on(){t||(u.block(),s.removeClass("unloaded"),n.addClass("unloaded"),t=!0)},off(){t&&(i.empty(),d.hasClass("unloaded")&&d.removeClass("unloaded"),s.addClass("unloaded"),a.removeClass("visible"),n.removeClass("unloaded"),u.release(),c.val(""),t=!1)},isVisible(){return t}}}();function f(){return o.hasClass("loaded")}e.click(function(){p.on(),h.on(),c.focus()}),o.click(function(){p.off(),h.off()}),c.focus(function(){r.addClass("input-focus")}),c.focusout(function(){r.removeClass("input-focus")}),c.on("keyup",function(t){8===t.keyCode&&""===c.val()?f()?d.removeClass("unloaded"):h.off():""!==c.val()&&(h.on(),a.hasClass("visible")||a.addClass("visible"),f()&&d.addClass("unloaded"))}),a.on("click",function(){c.val(""),f()?(d.removeClass("unloaded"),i.empty()):h.off(),c.focus(),a.removeClass("visible")})}),$(function(){var t=function(){const t="sidebar-display";let e=!1;const o=$("body");return{toggle(){!1===e?o.attr(t,""):o.removeAttr(t),e=!e}}}();$("#sidebar-trigger").click(t.toggle),$("#mask").click(t.toggle)}),$(function(){$('[data-toggle="tooltip"]').tooltip()}),$(function(){const o=$("#topbar-wrapper"),a=$("#panel-wrapper"),n=$("#search-input"),l="topbar-up",r="topbar-down",s="toc-scrolling-up";let e,i=0;const c=o.outerHeight(),d=o.outerHeight();$(window).scroll(function(t){$("#topbar-title").is(":hidden")&&(e=!0)}),setInterval(function(){e&&(function(){var t,e=$(this).scrollTop();Math.abs(i-e)<=c||(e>i?e>d&&(o.removeClass(r).addClass(l),a.removeClass(r),n.is(":focus")&&n.blur()):e+$(window).height()<$(document).height()&&(void 0!==(t=o.attr(s))?"false"===t&&o.removeAttr(s):(o.removeClass(l).addClass(r),a.addClass(r))),i=e)}(),e=!1)},250)}),$(function(){const t=$("#topbar-title"),e=$("div.post>h1"),o=t.text().trim();let a=(0<e.length?e:$("h1")).text().trim();($("#page-category").length||$("#page-tag").length)&&/\s/.test(a)&&(a=a.replace(/[0-9]/g,"").trim()),$(window).scroll(function(){return!($("#post-list").length||e.is(":hidden")||t.is(":hidden")||$("#sidebar.sidebar-expand").length)&&void(95<=$(this).scrollTop()?t.text()!==a&&t.text(a):t.text()!==o&&t.text(o))}),t.click(function(){$("body,html").animate({scrollTop:0},800)})}),$(function(){var t="#main > div.row:first-child > div:first-child";if(!($(t+" img").length<=0)){var e=document.querySelectorAll(t+" img[data-src]");const o=lozad(e);o.observe(),$(t+` p > img[data-src],${t} img[data-src].preview-img`).each(function(){let t=$(this).next();var e="EM"===t.prop("tagName")?t.text():"",o=$(this).attr("data-src");$(this).wrap(`<a href="${o}" title="${e}" class="popup"></a>`)}),$(".popup").magnificPopup({type:"image",closeOnContentClick:!0,showCloseBtn:!1,zoom:{enabled:!0,duration:300,easing:"ease-in-out"}}),$(t+" a").has("img").addClass("img-link")}}),$(function(){let o=$(".timeago").length,t=void 0;const n=$("meta[name=day-prompt]").attr("content"),l=$("meta[name=hour-prompt]").attr("content"),r=$("meta[name=minute-prompt]").attr("content"),s=$("meta[name=justnow-prompt]").attr("content");function e(){return $(".timeago").each(function(){var t,e;!1!==$(this)[0].hasAttribute("date")?(e=function(t,e){let o=new Date,a=new Date(t);return a.getFullYear()!==o.getFullYear()||a.getMonth()!==o.getMonth()?e:(t=Math.floor((o-a)/1e3),1<=(e=Math.floor(t/86400))?` ${e} `+n:1<=(e=Math.floor(t/3600))?` ${e} `+l:1<=(t=Math.floor(t/60))?` ${t} `+r:s)}($(this).attr("date"),t=$(this).text()))===t?$(this).removeAttr("date"):$(this).text(e):--o}),0===o&&void 0!==t&&clearInterval(t),o}0!==o&&0<e()&&(t=setInterval(e,6e4))}),$(function(){$("input[type=checkbox]").addClass("unloaded"),$("input[type=checkbox][checked]").before('<i class="fas fa-check-circle checked"></i>'),$("input[type=checkbox]:not([checked])").before('<i class="far fa-circle"></i>')}),$(function(){var t=".code-header>button";const e="timeout";function n(t){if($(t)[0].hasAttribute(e)){t=$(t).attr(e);if(Number(t)>Date.now())return 1}}function l(t){$(t).attr(e,Date.now()+2e3)}function r(t){$(t).removeAttr(e)}const o=new ClipboardJS(t,{target(t){let e=t.parentNode.nextElementSibling;return e.querySelector("code .rouge-code")}});$(t).tooltip({trigger:"hover",placement:"left"});const a=function(t){let e=$(t).children();return e.attr("class")}(t);o.on("success",t=>{t.clearSelection();const e=t.trigger;var o;n(e)||(function(t){let e=$(t),o=e.children();o.attr("class","fas fa-check")}(e),o=e,t=$(o).attr("title-succeed"),$(o).attr("data-original-title",t).tooltip("show"),l(e),setTimeout(()=>{var t;t=e,$(t).tooltip("hide").removeAttr("data-original-title"),function(t){let e=$(t),o=e.children();o.attr("class",a)}(e),r(e)},2e3))}),$("#copy-link").click(t=>{let e=$(t.target);if(!n(e)){t=window.location.href;const o=$("<input>");$("body").append(o),o.val(t).select(),document.execCommand("copy"),o.remove();const a=e.attr("data-original-title");t=e.attr("title-succeed");e.attr("data-original-title",t).tooltip("show"),l(e),setTimeout(()=>{e.attr("data-original-title",a),r(e)},2e3)}})}),$(function(){const i=$("#topbar-wrapper"),c=i.outerHeight(),t=$("#topbar-title"),d="toc-scrolling-up",u="scroll-focus";let p=0;$("a[href*='#']").not("[href='#']").not("[href='#0']").click(function(n){if(this.pathname.replace(/^\//,"")===location.pathname.replace(/^\//,"")&&location.hostname===this.hostname){const s=decodeURI(this.hash);let e=RegExp(/^#fnref:/).test(s),o=!e&&RegExp(/^#fn:/).test(s);var l=s.includes(":")?s.replace(/\:/g,"\\:"):s;let a=$(l);var r=$(this).parent().prop("tagName"),l=RegExp(/^H\d/).test(r),r=!t.is(":hidden");if(void 0!==a){n.preventDefault(),history.pushState&&history.pushState(null,null,s);n=l?$(this).offset().top:$(window).scrollTop();let t=a.offset().top-=8;t<n&&(l||o||r||(i.removeClass("topbar-down").addClass("topbar-up"),i.attr(d,!0),p+=1),(l||e)&&r&&(t-=c,console.log("[smooth] mobile -= topbar height"))),$("html").animate({scrollTop:t},500,()=>(a.focus(),$(`[${u}=true]`).length&&$(`[${u}=true]`).attr(u,!1),$(":target").length&&$(":target").attr(u,!1),(o||e)&&a.attr(u,!0),a.is(":focus")?!1:(a.attr("tabindex","-1"),a.focus(),void(void 0!==i.attr(d)&&(--p,p<=0&&i.attr(d,"false"))))))}}})});
\ No newline at end of file
+$(function(){$(window).scroll(()=>{50<$(this).scrollTop()&&"none"===$("#sidebar-trigger").css("display")?$("#back-to-top").fadeIn():$("#back-to-top").fadeOut()}),$("#back-to-top").click(()=>($("body,html").animate({scrollTop:0},800),!1))}),$(function(){$(".mode-toggle").click(t=>{const e=$(t.target);let o=e.prop("tagName")==="button".toUpperCase()?e:e.parent();o.blur(),flipMode()})}),$(function(){const t=$("#sidebar-trigger"),e=$("#search-trigger"),o=$("#search-cancel"),a=$("#search-cleaner"),n=$("#main"),r=$("#topbar-title"),l=$("#search-wrapper"),s=$("#search-result-wrapper"),i=$("#search-results"),c=$("#search-input"),d=$("#search-hints"),u=function(){let t=0;return{block(){t=window.scrollY,$("html,body").scrollTop(0)},release(){$("html,body").scrollTop(t)},getOffset(){return t}}}(),p={on(){t.addClass("unloaded"),r.addClass("unloaded"),e.addClass("unloaded"),l.addClass("d-flex"),o.addClass("loaded")},off(){o.removeClass("loaded"),l.removeClass("d-flex"),t.removeClass("unloaded"),r.removeClass("unloaded"),e.removeClass("unloaded")}},f=function(){let t=!1;return{on(){t||(u.block(),s.removeClass("unloaded"),n.addClass("unloaded"),t=!0)},off(){t&&(i.empty(),d.hasClass("unloaded")&&d.removeClass("unloaded"),s.addClass("unloaded"),a.removeClass("visible"),n.removeClass("unloaded"),u.release(),c.val(""),t=!1)},isVisible(){return t}}}();function h(){return o.hasClass("loaded")}e.click(function(){p.on(),f.on(),c.focus()}),o.click(function(){p.off(),f.off()}),c.focus(function(){l.addClass("input-focus")}),c.focusout(function(){l.removeClass("input-focus")}),c.on("keyup",function(t){8===t.keyCode&&""===c.val()?h()?d.removeClass("unloaded"):f.off():""!==c.val()&&(f.on(),a.hasClass("visible")||a.addClass("visible"),h()&&d.addClass("unloaded"))}),a.on("click",function(){c.val(""),h()?(d.removeClass("unloaded"),i.empty()):f.off(),c.focus(),a.removeClass("visible")})}),$(function(){var t=function(){const t="sidebar-display";let e=!1;const o=$("body");return{toggle(){!1===e?o.attr(t,""):o.removeAttr(t),e=!e}}}();$("#sidebar-trigger").click(t.toggle),$("#mask").click(t.toggle)}),$(function(){$('[data-toggle="tooltip"]').tooltip()}),$(function(){const o=$("#topbar-wrapper"),a=$("#panel-wrapper"),n=$("#search-input"),r="topbar-up",l="topbar-down",s="toc-scrolling-up";let e,i=0;const c=o.outerHeight(),d=o.outerHeight();$(window).scroll(function(t){$("#topbar-title").is(":hidden")&&(e=!0)}),setInterval(function(){e&&(function(){var t,e=$(this).scrollTop();Math.abs(i-e)<=c||(e>i?e>d&&(o.removeClass(l).addClass(r),a.removeClass(l),n.is(":focus")&&n.blur()):e+$(window).height()<$(document).height()&&(void 0!==(t=o.attr(s))?"false"===t&&o.removeAttr(s):(o.removeClass(r).addClass(l),a.addClass(l))),i=e)}(),e=!1)},250)}),$(function(){const t=$("#topbar-title"),e=$("div.post>h1"),o=t.text().trim();let a=(0<e.length?e:$("h1")).text().trim();($("#page-category").length||$("#page-tag").length)&&/\s/.test(a)&&(a=a.replace(/[0-9]/g,"").trim()),$(window).scroll(function(){return!($("#post-list").length||e.is(":hidden")||t.is(":hidden")||$("#sidebar.sidebar-expand").length)&&void(95<=$(this).scrollTop()?t.text()!==a&&t.text(a):t.text()!==o&&t.text(o))}),t.click(function(){$("body,html").animate({scrollTop:0},800)})}),$(function(){var t="#main > div.row:first-child > div:first-child";if(!($(t+" img").length<=0)){var e=document.querySelectorAll(t+" img[data-src]");const o=lozad(e);o.observe(),$(t+` p > img[data-src],${t} img[data-src].preview-img`).each(function(){let t=$(this).next();var e="EM"===t.prop("tagName")?t.text():"",o=$(this).attr("data-src");$(this).wrap(`<a href="${o}" title="${e}" class="popup"></a>`)}),$(".popup").magnificPopup({type:"image",closeOnContentClick:!0,showCloseBtn:!1,zoom:{enabled:!0,duration:300,easing:"ease-in-out"}}),$(t+" a").has("img").addClass("img-link")}}),$(function(){let o=$(".timeago").length,t=void 0;const n=$("meta[name=day-prompt]").attr("content"),r=$("meta[name=hour-prompt]").attr("content"),l=$("meta[name=minute-prompt]").attr("content"),s=$("meta[name=justnow-prompt]").attr("content");function e(){return $(".timeago").each(function(){var t,e;!1!==$(this)[0].hasAttribute("date")?(e=function(t,e){let o=new Date,a=new Date(t);return a.getFullYear()!==o.getFullYear()||a.getMonth()!==o.getMonth()?e:(t=Math.floor((o-a)/1e3),1<=(e=Math.floor(t/86400))?` ${e} `+n:1<=(e=Math.floor(t/3600))?` ${e} `+r:1<=(t=Math.floor(t/60))?` ${t} `+l:s)}($(this).attr("date"),t=$(this).text()))===t?$(this).removeAttr("date"):$(this).text(e):--o}),0===o&&void 0!==t&&clearInterval(t),o}0!==o&&0<e()&&(t=setInterval(e,6e4))}),$(function(){$("input[type=checkbox]").addClass("unloaded"),$("input[type=checkbox][checked]").before('<i class="fas fa-check-circle checked"></i>'),$("input[type=checkbox]:not([checked])").before('<i class="far fa-circle"></i>')}),$(function(){var t=".code-header>button";const e="timeout";function n(t){if($(t)[0].hasAttribute(e)){t=$(t).attr(e);if(Number(t)>Date.now())return 1}}function r(t){$(t).attr(e,Date.now()+2e3)}function l(t){$(t).removeAttr(e)}const o=new ClipboardJS(t,{target(t){let e=t.parentNode.nextElementSibling;return e.querySelector("code .rouge-code")}});$(t).tooltip({trigger:"hover",placement:"left"});const a=function(t){let e=$(t).children();return e.attr("class")}(t);o.on("success",t=>{t.clearSelection();const e=t.trigger;var o;n(e)||(function(t){let e=$(t),o=e.children();o.attr("class","fas fa-check")}(e),o=e,t=$(o).attr("title-succeed"),$(o).attr("data-original-title",t).tooltip("show"),r(e),setTimeout(()=>{var t;t=e,$(t).tooltip("hide").removeAttr("data-original-title"),function(t){let e=$(t),o=e.children();o.attr("class",a)}(e),l(e)},2e3))}),$("#copy-link").click(t=>{let e=$(t.target);if(!n(e)){t=window.location.href;const o=$("<input>");$("body").append(o),o.val(t).select(),document.execCommand("copy"),o.remove();const a=e.attr("data-original-title");t=e.attr("title-succeed");e.attr("data-original-title",t).tooltip("show"),r(e),setTimeout(()=>{e.attr("data-original-title",a),l(e)},2e3)}})}),$(function(){const i=$("#topbar-wrapper"),c=i.outerHeight(),t=$("#topbar-title"),d="toc-scrolling-up",u="scroll-focus";let p=0;$("a[href*='#']").not("[href='#']").not("[href='#0']").click(function(n){if(this.pathname.replace(/^\//,"")===location.pathname.replace(/^\//,"")&&location.hostname===this.hostname){const s=decodeURI(this.hash);let e=RegExp(/^#fnref:/).test(s),o=!e&&RegExp(/^#fn:/).test(s);var r=s.includes(":")?s.replace(/\:/g,"\\:"):s;let a=$(r);var l=$(this).parent().prop("tagName"),r=RegExp(/^H\d/).test(l),l=!t.is(":hidden");if(void 0!==a){n.preventDefault(),history.pushState&&history.pushState(null,null,s);n=r?$(this).offset().top:$(window).scrollTop();let t=a.offset().top-=8;t<n&&(r||o||l||(i.removeClass("topbar-down").addClass("topbar-up"),i.attr(d,!0),p+=1),(r||e)&&l&&(t-=c)),$("html").animate({scrollTop:t},500,()=>(a.focus(),$(`[${u}=true]`).length&&$(`[${u}=true]`).attr(u,!1),$(":target").length&&$(":target").attr(u,!1),(o||e)&&a.attr(u,!0),a.is(":focus")?!1:(a.attr("tabindex","-1"),a.focus(),void(void 0!==i.attr(d)&&(--p,p<=0&&i.attr(d,"false"))))))}}})});
\ No newline at end of file