improve message

hatena_blog_katex_loader.js

document.addEventListener("DOMContentLoaded", () => {
    "use strict";
    Array.from(document.getElementsByClassName("math-render"))
        .filter(e => !e.mathRendered)
        .forEach(e => {
            try {
                katex.render(e.textContent, e, {displayMode: true });
            } catch (ex) {
                e.textContent = ex.message;
            }
        });
    Array.from(document.getElementsByClassName("entry-content")).forEach(e => {
        renderMathInElement(e, { delimiters: [
            { left: "$$", right: "$$", display: true },
            { left: "$", right: "$", display: false }
        ]});
    });
    //http://developer.hateblo.jp/entry/2014/11/06/jQueryUI
    function alertDialog(_options){
        var default_option = {
            title:"",
            body:"",
            close: function(){ return true; }
        }
        var options = $.extend(default_option , _options, {});
        var dom = $("<div />", { title: options.title, html: options.body });
        dom.dialog({
            modal: true,
            close: function(){
                var dom = $(this);
                dom.dialog("destroy");
                dom.remove();
                options.close();
            },
            buttons: [{
                text: "Ok",
                click: function() {
                    $(this).dialog("close");
                }
            }]
        });
    };
    Array.from(document.getElementsByClassName("katex")).forEach(e => {
        const isTouch = (('ontouchstart' in window) || (navigator.MaxTouchPoints > 0) || (navigator.msMaxTouchPoints > 0));
        const tooltip = (isTouch) ? "touch again to watch tex" : "long press to watch tex";
        //for microtip
        //https://github.com/ghosh/microtip
        e.setAttribute("aria-label", tooltip);
        e.setAttribute("data-microtip-position", "up");
        e.setAttribute("role", "tooltip");
        const an = e.getElementsByTagName("annotation");
        if(0 === an.length) return;
        if (isTouch) {
            let counter = 0;
            let timer = 0;
            e.addEventListener("touchstart", () => {
                if(0 !== timer) clearTimeout(timer);
                ++counter;
                timer = setTimeout(() => {
                    counter = 0;
                }, 10 * 1000);
                if(2 === counter) {
                    counter = 0;
                    alertDialog({title:"tex",body:an[0].textContent});
                }
            });
        }
        //using https://github.com/john-doherty/long-press
        e.addEventListener("long-press", ev => {
            ev.preventDefault();
            alert(an[0].textContent);
        });
    });
});

hatena_blog_katex_loader.min.js

document.addEventListener("DOMContentLoaded",()=>{"use strict";Array.from(document.getElementsByClassName("math-render")).filter(t=>!t.mathRendered).forEach(t=>{try{katex.render(t.textContent,t,{displayMode:!0})}catch(e){t.textContent=e.message}}),Array.from(document.getElementsByClassName("entry-content")).forEach(t=>{renderMathInElement(t,{delimiters:[{left:"$$",right:"$$",display:!0},{left:"$",right:"$",display:!1}]})}),Array.from(document.getElementsByClassName("katex")).forEach(t=>{const e="ontouchstart"in window||navigator.MaxTouchPoints>0||navigator.msMaxTouchPoints>0,o=e?"touch again to watch tex":"long press to watch tex";t.setAttribute("aria-label",o),t.setAttribute("data-microtip-position","up"),t.setAttribute("role","tooltip");const n=t.getElementsByTagName("annotation");if(0!==n.length){if(e){let e=0,o=0;t.addEventListener("touchstart",()=>{0!==o&&clearTimeout(o),++e,o=setTimeout(()=>{e=0},1e4),2===e&&(e=0,function(t){var e=$.extend({title:"",body:"",close:function(){return!0}},t,{});$("<div />",{title:e.title,html:e.body}).dialog({modal:!0,close:function(){var t=$(this);t.dialog("destroy"),t.remove(),e.close()},buttons:[{text:"Ok",click:function(){$(this).dialog("close")}}]})}({title:"tex",body:n[0].textContent}))})}t.addEventListener("long-press",t=>{t.preventDefault(),alert(n[0].textContent)})}})});