animejs鼠标点击实现动画效果

此博客已实现鼠标点击动画效果，可以左击鼠标地方看看效果呦…

先引入animejs

<script src="https://cdn.bootcss.com/animejs/2.2.0/anime.min.js"></script>

在body标签内

<canvas id="fireworks" style="position: fixed;left: 0;top: 0;z-index: 1; pointer-events: none;"></canvas>

编写js

<script>   
    function updateCoords(e) {
        pointerX = (e.clientX || e.touches[0].clientX) - canvasEl.getBoundingClientRect().left, pointerY = e.clientY || e.touches[0].clientY - canvasEl.getBoundingClientRect().top
    }

    function setParticuleDirection(e) {
        var t = anime.random(0, 360) * Math.PI / 180, a = anime.random(50, 180), n = [-1, 1][anime.random(0, 1)] * a;
        return {x: e.x + n * Math.cos(t), y: e.y + n * Math.sin(t)}
    }

    function createParticule(e, t) {
        var a = {};
        return a.x = e, a.y = t, a.color = colors[anime.random(0, colors.length - 1)], a.radius = anime.random(16, 32), a.endPos = setParticuleDirection(a), a.draw = function () {
            ctx.beginPath(), ctx.arc(a.x, a.y, a.radius, 0, 2 * Math.PI, !0), ctx.fillStyle = a.color, ctx.fill()
        }, a
    }

    function createCircle(e, t) {
        var a = {};
        return a.x = e, a.y = t, a.color = "#F00", a.radius = 0.1, a.alpha = 0.5, a.lineWidth = 6, a.draw = function () {
            ctx.globalAlpha = a.alpha, ctx.beginPath(), ctx.arc(a.x, a.y, a.radius, 0, 2 * Math.PI, !0), ctx.lineWidth = a.lineWidth, ctx.strokeStyle = a.color, ctx.stroke(), ctx.globalAlpha = 1
        }, a
    }

    function renderParticule(e) {
        for (var t = 0; t < e.animatables.length; t++) {
            e.animatables[t].target.draw()
        }
    }

    function animateParticules(e, t) {
        for (var a = createCircle(e, t), n = [], i = 0; i < numberOfParticules; i++) {
            n.push(createParticule(e, t))
        }
        anime.timeline().add({
            targets: n, x: function (e) {
                return e.endPos.x
            }, y: function (e) {
                return e.endPos.y
            }, radius: 0.1, duration: anime.random(1200, 1800), easing: "easeOutExpo", update: renderParticule
        }).add({
            targets: a,
            radius: anime.random(80, 160),
            lineWidth: 0,
            alpha: {value: 0, easing: "linear", duration: anime.random(600, 800)},
            duration: anime.random(1200, 1800),
            easing: "easeOutExpo",
            update: renderParticule,
            offset: 0
        })
    }

    function debounce(e, t) {
        var a;
        return function () {
            var n = this, i = arguments;
            clearTimeout(a), a = setTimeout(function () {
                e.apply(n, i)
            }, t)
        }
    }

    var canvasEl = document.getElementById("fireworks");
    if (canvasEl) {
        var ctx = canvasEl.getContext("2d"), numberOfParticules = 30, pointerX = 0, pointerY = 0, tap = "mousedown",
            colors = ["#FF1461", "#18FF92", "#5A87FF", "#FBF38C"], setCanvasSize = debounce(function () {
                canvasEl.width = 2 * window.innerWidth, canvasEl.height = 2 * window.innerHeight, canvasEl.style.width = window.innerWidth + "px", canvasEl.style.height = window.innerHeight + "px", canvasEl.getContext("2d").scale(2, 2)
            }, 500), render = anime({
                duration: 1 / 0, update: function () {
                    ctx.clearRect(0, 0, canvasEl.width, canvasEl.height)
                }
            });
        document.addEventListener(tap, function (e) {
            "sidebar" !== e.target.id && "toggle-sidebar" !== e.target.id && "A" !== e.target.nodeName && "IMG" !== e.target.nodeName && (render.play(), updateCoords(e), animateParticules(pointerX, pointerY))
        }, !1), setCanvasSize(), window.addEventListener("resize", setCanvasSize, !1)
    }
</script>