之前用的 Pinghsu 上有个动态字幕的效果。

网上找了几段代码抄了抄，如下：

var marquee = function (r) {
        function t() {
            return b[Math.floor(Math.random() * b.length)]
        }
        function e() {
            return String.fromCharCode(94 * Math.random() + 33)
        }
        function n(r) {
            for (var n = document.createDocumentFragment(), i = 0; r > i; i++) {
                var l = document.createElement("span");
                l.textContent = e(), l.style.color = t(), n.appendChild(l)
            }
            return n
        }
        function i() {
            var t = o[c.skillI];
            c.step ? c.step-- : (c.step = g, c.prefixP < l.length ? (c.prefixP >= 0 && (c.text += l[c.prefixP]), c.prefixP++) : "forward" === c.direction ? c.skillP < t.length ? (c.text += t[c.skillP], c.skillP++) : c.delay ? c.delay-- : (c.direction = "backward", c.delay = a) : c.skillP > 0 ? (c.text = c.text.slice(0, -1), c.skillP--) : (c.skillI = (c.skillI + 1) % o.length, c.direction = "forward")), r.textContent = c.text, r.appendChild(n(c.prefixP < l.length ? Math.min(s, s + c.prefixP) : Math.min(s, t.length - c.skillP))), setTimeout(i, d)
        }
    var l = "永远他妈的",
        o = ["热泪盈眶.", "百感交集.","声泪俱下.", "情不自禁.", "心潮澎湃.","感慨万千.","悲喜交加.","心潮起伏."].map(function (r)
        {
            return r + ""
        }), a = 2, g = 1, s = 5, d = 75,
        b = ["rgb(110,64,170)", "rgb(150,61,179)", "rgb(191,60,175)", "rgb(228,65,157)", "rgb(254,75,131)", "rgb(255,94,99)", "rgb(255,120,71)", "rgb(251,150,51)", "rgb(226,183,47)", "rgb(198,214,60)", "rgb(175,240,91)", "rgb(127,246,88)", "rgb(82,246,103)", "rgb(48,239,130)", "rgb(29,223,163)", "rgb(26,199,194)", "rgb(35,171,216)", "rgb(54,140,225)", "rgb(76,110,219)", "rgb(96,84,200)"],
        c = {text: "", prefixP: -s, skillI: 0, skillP: 0, direction: "forward", delay: a, step: g};
    i()
};
marquee(document.getElementById('marquee'));

新增一个 id 为 marquee 的 div，或将需要显示元素的 id 改为 marquee 即可。

<div id="marquee"></div>

效果见博客左上角。