js 随机点名

 

1、对象构造函数

设置节点与人名

    constructor({ printElement, startElement, stopElement , person }) {
        this.list = person;  
        this.printElement = printElement;
        this.startElement = startElement;
        this.stopElement = stopElement;
        this.interval = null;
        this.time = 100;
    }

 

2、生成随机对象

    /**
     * 随机人名
     */
    random(){
        // 获取区间范围内的数据
        let num = Math.floor(Math.random() * this.list.length);
        return this.list[num]
    }

 

3、开始事件

    /**
     * 开始
     */
    start() {
        let [startNode, printNode, index] = [
            document.getElementById(this.startElement),
            document.getElementById(this.printElement)
        ]
        startNode.addEventListener("click", (event) => {
            this.interval = setInterval((event) => {                
                printNode.textContent = this.random();
            }, this.time, printNode);
        }, false);
    }

 

4、结束事件

    /**
     * 停止
     */
    stop() {
        let node = document.getElementById(this.stopElement);
        node.addEventListener('click', (event) => {
            clearInterval(this.interval);
        }, false);
    }

 

代码下载地址：https://pan.baidu.com/s/1DgOWML9OoOoA2fiddeYCTQ