原生js实现鼠标点击出现文字特效（颜色随机）！

可供参考，可直接通过链接引用！
以下是js文件：

window.onload = function() {
	//定义点击出现文字类
	function ClickFrontShow() {
		//定义所需文字和颜色
		this.fron = ['高兴', '开心', '❤', '欢乐', '愉悦', '愉快', '快乐', '欢喜', '喜悦', '欢欣', '欢畅', '欢腾', '雀跃', '欢快'];
		this.colo = ['#FF69B4', '#ff6651', 'orange', '#FF00FF', '#00FF7F', '#00BFFF', '#BA55D3'];
		//获取body元素
		this.elBody = document.getElementsByTagName("body")[0];
		//初始化randomNum
		this.randomNum = null;
		//初始化字体inde
		this.finde = 0;
		//初始化className
		this.cls = 0;
	}
	
	//定义初始化
	ClickFrontShow.prototype.init = function(frontArray, colorArray) {
		//自定义颜色和字体
		this.fron = frontArray || this.fron;
		this.colo = colorArray || this.colo;
		
		this.listenMouse();
	}
	
	//创建文字 
	ClickFrontShow.prototype.createFront = function (classname) {
		var self = this;
		let ospan = document.createElement('span');
		//设置样式
		let cssText = "position:absolute; width: 40px; height: 20px; cursor: default; transform: translate(-50%,-50%); font-weight: bold; opacity: 1; z-index: 1000; transition: 1s;";
		//随机字体和颜色
		let randomFront = self.fron[self.finde];
		let randomColor = self.colo[Math.round(Math.random()*(self.colo.length-1))];
		//字体下标增1
		self.finde = (self.finde+1) % self.fron.length;
		//向body中添加元素
		self.elBody.appendChild(ospan);
		//绑定一个classname
		ospan.className = String(classname);
		//添加样式
		ospan.style.cssText = cssText + "-moz-user-select: none;-webkit-user-select: none;-ms-user-select: none;user-select: none;"
		ospan.style.color = randomColor;
		ospan.innerHTML = randomFront;
	}
	
	
	//监听鼠标点击
	ClickFrontShow.prototype.listenMouse = function() {
		var self = this;

		//鼠标点击事件
		document.onclick = function(e) {
			//避免classname值重复导致出现bug
			if(self.cls === 20){
				self.cls = 0;
			}else{
				self.cls += 1;
			}
			//创建文字
			self.createFront(self.cls);
			let el = document.getElementsByClassName(self.cls)[0];
			
			//鼠标点击位置
			el.style.left = e.clientX + 'px';
			el.style.top = e.clientY + 'px';
			
			//过时改变
			setTimeout(function() {
				el.style.opacity = 0;
				el.style.top = el.offsetTop - 100 + 'px';
			}, 100);
			//过时清除
			setTimeout(function() {
				self.elBody.removeChild(el);
			}, 2000);
		}
		
	}
	
	//实例化
	var frontShow = new ClickFrontShow();
	//用户可在此传递参数，默认第一个参数是字体数组；
	//第二个参数是颜色数组，必须是数组类型！
	frontShow.init();
 }