本教程适用于基于Twikoo的评论系统

前言

美化之前

美化的时候需要修改网站的源文件、添加样式、js之类的，需要一点基础，可以参考

引用站外地址
Hexo博客添加自定义css和js文件
Leonus

在添加完js、css后，一定要记得在_config.butterfly.yml的inject里引用

引用站外地址
Butterfly自用全局变量
June's Blog

效果

参考链接

引用站外地址
重构记录 - 4
爱吃肉的猫
引用站外地址
Butterfly主题的留言弹幕界面增强版（支持Twikoo、Waline、Valine）
Ariasakaの小窝

修改方案

1. 获取Twikoo和TwikooUrl

仅提供Vercel部署的获取方式

腾讯云部署方式请参考Butterfly主题的留言弹幕界面增强版（支持Twikoo、Waline、Valine）

在开发人员工具->应用程序->本地存储空间->自己的网址->twikoo-access-token里面即可看到对应的值

2. 修改layout.pug

修改[blogRoot]\butterfly\layout\includes\layout.pug

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        ...
        main#content-inner.layout(class=hideAside)
          if body
            div!= body
          else
            block content
            if theme.aside.enable && page.aside !== false
              include widget/index.pug

+        .comment-barrage
        ...
小改动

因为我的侧栏aside在左边，所以弹幕会和文章页有重合

又因为原本的教程里，#post是.comment-barrage的祖先，所以当我hover弹幕.comment-barrage元素的时候，会触发祖先#post的hover效果，这样会显得怪怪的，然后我想着调整一下，看有没有办法不这样

在.comment-barrage-item元素上添加一个事件处理程序，阻止事件冒泡到其祖先元素（包括post元素）上。修改popCommentBarrage函数，为新创建的barrage元素添加事件处理程序来阻止事件冒泡

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function popCommentBarrage(data) {
    let barrage = document.createElement('div');
    let width = commentBarrageConfig.dom.clientWidth;
    let height = commentBarrageConfig.dom.clientHeight;
    barrage.className = 'comment-barrage-item';
    barrage.innerHTML = `
        <div class="barrageHead">
            <a class="barrageTitle">热评</a>
            <div class="barrageNick">${data.nick}</div>
            <img class="barrageAvatar" src="https://cravatar.cn/avatar/${data.mailMd5}"/>
            <a class="comment-barrage-close" href="javascript:hotreview.switchCommentBarrage()"><i class="iconfont icat-close"></i></a>
        </div>
        <a class="barrageContent" href="javascript:hotreview.scrollTo('${data.id}');">${data.comment}</a>
    `;

    // 阻止事件冒泡到祖先元素
    barrage.addEventListener('mouseenter', function(event) {
        event.stopPropagation();
    });

    commentBarrageConfig.barrageTimer.push(barrage);
    commentBarrageConfig.dom.append(barrage);
}

用这种方法，可以监听到，但是阻止不了，我感觉像是hover并不是一个事件，阻止不了

css 子元素hover时不触发父元素hover - 珞珞9527 - 博客园 (cnblogs.com)

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function popCommentBarrage(data) {
    let barrage = document.createElement('div');
    let width = commentBarrageConfig.dom.clientWidth;
    let height = commentBarrageConfig.dom.clientHeight;
    barrage.className = 'comment-barrage-item';
    barrage.innerHTML = `
        <div class="barrageHead">
            <a class="barrageTitle">热评</a>
            <div class="barrageNick">${data.nick}</div>
            <img class="barrageAvatar" src="https://cravatar.cn/avatar/${data.mailMd5}"/>
            <a class="comment-barrage-close" href="javascript:hotreview.switchCommentBarrage()"><i class="iconfont icat-close"></i></a>
        </div>
        <a class="barrageContent" href="javascript:hotreview.scrollTo('${data.id}');">${data.comment}</a>
    `;

    // 创建遮罩层
    let mask = document.createElement('div');
    mask.className = 'barrage-mask';
    barrage.appendChild(mask);

    commentBarrageConfig.barrageTimer.push(barrage);
    commentBarrageConfig.dom.append(barrage);
}
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.barrage-mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: transparent;
    pointer-events: none; /* 避免遮挡下方元素的鼠标事件 */
}

问了chat，感觉没啥用，就没有细去研究😓

后面和鹊楠讨论的时候，给了个思路，既然#post是.comment-barrage的祖先，而且参考了其他佬的源码（#post并不是.comment-barrage的祖先）那就干脆把.comment-barrage移到#post外面，所以就有了上面的方案

3. 创建barrage.js和commentBarrage.js

barrage.js

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// 热评弹窗跳转
var hotreview = {
    switchCommentBarrage: function() {
        var commentBarrage = document.querySelector(".comment-barrage");
        if (commentBarrage) {
            if ($(commentBarrage).is(":visible")) {
                $(commentBarrage).hide();
                $(".menu-commentBarrage-text").text("显示热评");
                localStorage.setItem("commentBarrageSwitch", "false");
            } else if ($(commentBarrage).is(":hidden")) {
                $(commentBarrage).show();
                $(".menu-commentBarrage-text").text("关闭热评");
                localStorage.removeItem("commentBarrageSwitch");
            }
        }
    },
    scrollTo: function (e) {
        const t = document.getElementById(e);
        if (t) {
            const e = t.getBoundingClientRect().top + window.pageYOffset - 80,
                o = window.pageYOffset,
                n = e - o;
            let a = null;
            window.requestAnimationFrame((function e(t) {
                a || (a = t);
                const i = t - a,
                    l = (c = Math.min(i / 0, 1)) < .5 ? 2 * c * c : (4 - 2 * c) * c - 1;
                var c;
                window.scrollTo(0, o + n * l),
                i < 600 && window.requestAnimationFrame(e)
            }))
        }
    }
    ,
}

commentBarrage.js

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var postCommentElement = document.getElementById("post-comment");
if (postCommentElement) {
    var commentBarrageConfig = {
        // 同时最多显示弹幕数
        maxBarrage: 1,
        // 初始弹幕显示时间ms
        initialBarrageTime: 500,
        // 弹幕显示间隔时间ms
        barrageTime: 4000,
        // twikoo部署地址腾讯云的为环境ID
        twikooUrl: "{envId}",
        // token获取见上方
        accessToken: "{YOUR_TOKEN}",
        pageUrl: window.location.pathname,
        barrageTimer: [],
        barrageList: [],
        barrageIndex: 0,
        dom: document.querySelector('.comment-barrage'),
    };

    var commentInterval = null;
    var hoverOnCommentBarrage = false;

    $(".comment-barrage").hover(function() {
        hoverOnCommentBarrage = true;
        console.log("热评悬浮");
    }, function() {
        hoverOnCommentBarrage = false;
        console.log("停止悬浮");
    });

    function initCommentBarrage(){
        // console.log("开始创建热评")

        var data = JSON.stringify({
            "event": "COMMENT_GET",
            "commentBarrageConfig.accessToken": commentBarrageConfig.accessToken,
            "url": commentBarrageConfig.pageUrl
        });
        var xhr = new XMLHttpRequest();
        xhr.withCredentials = true;
        xhr.addEventListener("readystatechange", function() {
            if(this.readyState === 4) {
                commentBarrageConfig.barrageList = commentLinkFilter(JSON.parse(this.responseText).data);
                commentBarrageConfig.dom.innerHTML = '';
            }
        });
        xhr.open("POST", commentBarrageConfig.twikooUrl);
        xhr.setRequestHeader("Content-Type", "application/json");
        xhr.send(data);


        clearInterval(commentInterval);
        commentInterval = null;

        commentInterval = setInterval(() => {
            if (commentBarrageConfig.barrageList.length && !hoverOnCommentBarrage) {
                popCommentBarrage(commentBarrageConfig.barrageList[commentBarrageConfig.barrageIndex]);
                commentBarrageConfig.barrageIndex += 1;
                commentBarrageConfig.barrageIndex %= commentBarrageConfig.barrageList.length;
            }
            if ((commentBarrageConfig.barrageTimer.length > (commentBarrageConfig.barrageList.length > commentBarrageConfig.maxBarrage ? commentBarrageConfig.maxBarrage : commentBarrageConfig.barrageList.length)) && !hoverOnCommentBarrage) {
                removeCommentBarrage(commentBarrageConfig.barrageTimer.shift())
            }
        }, commentBarrageConfig.initialBarrageTime);
    }

    function commentLinkFilter(data) {
        data.sort((a, b) => {
            return a.created - b.created;
        });
        let newData = [];
        data.forEach(item => {
            newData.push(...getCommentReplies(item));
        });
        return newData;
    }

    function getCommentReplies(item) {
        if (item.replies) {
            let replies = [item];
            item.replies.forEach(item => {
                replies.push(...getCommentReplies(item));
            });
            return replies;
        } else {
            return [];
        }
    }

    function popCommentBarrage(data) {
        let barrage = document.createElement('div');
        let width = commentBarrageConfig.dom.clientWidth;
        let height = commentBarrageConfig.dom.clientHeight;
        barrage.className = 'comment-barrage-item';
        barrage.innerHTML = `
            <div class="barrageHead">
                <a class="barrageTitle">热评</a>
                <div class="barrageNick">${data.nick}</div>
                <img class="barrageAvatar" src="https://cravatar.cn/avatar/${data.mailMd5}"/>
                <a class="comment-barrage-close" href="javascript:hotreview.switchCommentBarrage()"><i class="iconfont icat-close"></i></a>
            </div>
            <a class="barrageContent" href="javascript:hotreview.scrollTo('${data.id}');">${data.comment}</a>
        `;
        commentBarrageConfig.barrageTimer.push(barrage);
        commentBarrageConfig.dom.append(barrage);

        clearInterval(commentInterval);
        commentInterval = setInterval(() => {
            if (commentBarrageConfig.barrageList.length && !hoverOnCommentBarrage) {
                popCommentBarrage(commentBarrageConfig.barrageList[commentBarrageConfig.barrageIndex]);
                commentBarrageConfig.barrageIndex += 1;
                commentBarrageConfig.barrageIndex %= commentBarrageConfig.barrageList.length;
            }
            if ((commentBarrageConfig.barrageTimer.length > (commentBarrageConfig.barrageList.length > commentBarrageConfig.maxBarrage ? commentBarrageConfig.maxBarrage : commentBarrageConfig.barrageList.length)) && !hoverOnCommentBarrage) {
                removeCommentBarrage(commentBarrageConfig.barrageTimer.shift())
            }
        }, commentBarrageConfig.barrageTime);
    }

    function removeCommentBarrage(barrage) {
        barrage.className = 'comment-barrage-item out';
        setTimeout(() => {
            commentBarrageConfig.dom.removeChild(barrage);
        }, 1000);
    }

    // 自动隐藏
    document.addEventListener('scroll', btf.throttle(function() {
        //滚动条高度+视窗高度 = 可见区域底部高度
        var visibleBottom = window.scrollY + document.documentElement.clientHeight;
        //可见区域顶部高度
        var visibleTop = window.scrollY;
        // 获取翻页按钮容器
        var pagination = document.querySelector('.comment-barrage');
        // 获取位置监测容器，此处采用评论区
        var eventlistner = document.getElementById('post-comment');
        if (eventlistner && pagination) {
            var centerY = eventlistner.offsetTop + (eventlistner.offsetHeight / 2);
            if (document.body.clientWidth > 768) {
                if (centerY > visibleBottom) {
                    pagination.style.bottom = '40px';
                } else {
                    pagination.style.bottom = '-200px';
                }
            }
        }
    }, 200))

    initCommentBarrage();

    document.addEventListener('pjax:send', function() {
        clearInterval(commentInterval);
    });
}

4. 创建barrage.css

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/* 热评弹窗样式 */
.comment-barrage {
    position: fixed;
    bottom: 40px;
    right: 68px;
    display: flex;
    flex-direction: column;
    justify-content: end;
    align-items: flex-end;
    z-index: 999;
    transition: 0.3s;
    user-select: none;
    -webkit-user-select: none;
}

@media screen and (max-width: 768px){
    .comment-barrage {
        display: none!important;
    }
}
.comment-barrage-item {
    min-width: 286px;
    max-width: 286px;
    width: fit-content;
    min-height: 80px;
    max-height: 150px;
    margin: 4px;
    padding: 8px 14px;
    background: var(--june-maskbgdeep);
    border-radius: 8px;
    color: var(--june-fontcolor);
    animation: barrageIn 0.6s cubic-bezier(0.42, 0, 0.3, 1.11);
    transition: 0.3s;
    display: flex;
    flex-direction: column;
    border: var(--style-border-always);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: fixed;
    box-shadow: var(--june-shadow-border);
    overflow: hidden;
}

.comment-barrage-item:hover {
    border: 1px solid var(--june-border);
    box-shadow: var(--june-shadow-black);
}

.comment-barrage-item.out{
    opacity: 0;
    animation: barrageOut 0.6s cubic-bezier(0.42, 0, 0.3, 1.11);
}

.comment-barrage-item.hovered {
    opacity: 0;
}

.comment-barrage-item .comment-barrage-close {
    color: var(--june-secondtext);
    cursor: pointer;
    line-height: 1;
    margin: 4px;
}

.comment-barrage-item .comment-barrage-close .junefont {
    font-size: 18px!important;
}

.comment-barrage-item pre {
    display: none;
}

.comment-barrage-item li {
    display: none;
}

.comment-barrage-item p img:not(.tk-owo-emotion) {
    display: none;
}

.comment-barrage-item p img.tk-owo-emotion {
    width: 16px;
    padding: 0;
    margin: 0;
    transform: translateY(2px);
}

.comment-barrage-item blockquote {
    display: none;
}

.comment-barrage-item br {
    display: none;
}

.comment-barrage-item .barrageHead{
    height: 30px;
    padding: 0;
    line-height: 30px;
    font-size: 12px;
    border-bottom: var(--style-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: bold;
    padding-bottom: 6px;
}

.comment-barrage-item .barrageHead .barrageTitle {
    background: var(--june);
    color: var(--june-white);
    margin-right: 8px;
    line-height: 1;
    padding: 4px;
    border-radius: 4px;
    white-space:nowrap;
}

.comment-barrage-item .barrageAvatar{
    width: 18px;
    height: 18px;
    margin: 0;
    margin-left: auto;
    margin-right: 8px;
    border-radius: 50%;
    background: var(--june-secondbg);
    cursor: url(https://img.june-pj.cn/img/default.cur), default;
}
.comment-barrage-item .barrageContent{
    font-size: 14px!important;
    font-weight: normal!important;
    height: calc(100% - 30px);
    overflow: hidden;
    width: fit-content;
    max-height: 48px;
}

.comment-barrage-item .barrageContent a {
    pointer-events:none;
    font-size: 14px!important;
}

.comment-barrage-item .barrageContent::-webkit-scrollbar{
    height: 0;
    width: 4px;
}
.comment-barrage-item .barrageContent::-webkit-scrollbar-button{
    display: none;
}

.barrageHead .comment-barrage-close i {
    color: var(--june-fontcolor);
}

.comment-barrage-item p{
    color: var(--june-fontcolor);
    margin: 8px 0 0;
    line-height: 1.2;
    -webkit-line-clamp: 2;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    font-size: 12px;
    font-weight: bold;
    overflow: hidden;
    -o-text-overflow: ellipsis;
    text-overflow: ellipsis;
}
.comment-barrage-item p:hover,
.barrageHead .comment-barrage-close i:hover {
    color: var(--june);
}

5. 修改rightmenu.pug

修改 [blogRoot]\themes\butterfly\layout\includes\rightmenu.pug

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    ...
    .rightMenu-group.rightMenu-line.hide#menu-post
        a.rightMenu-item(href="#post-comment")
            i.fas.fa-comment
            span='空降评论'
+        a.rightMenu-item(href="javascript:hotreview.switchCommentBarrage()")
+            i.iconfont.icon-danmu
+            span.menu-commentBarrage-text 关闭热评
        ...