【循环定时器 _函数】 | IT修真院·坑乎

循环定时器

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函数

详细描述

截图

代码

<div class="grid">
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
</div>
<div class="btn">
    <button id="run" onclick="twinkle()">开始闪</button>
    <button id="stop" onclick="stop()">结束闪</button>
</div>



function getBox() {
    var box = document.getElementsByClassName("box");
    resent();
    //随机得到三个盒子
    for (var i = 0; i < 1000; i++) {
        var box1 = Math.floor(Math.random() * 9);
        var box2 = Math.floor(Math.random() * 9);
        var box3 = Math.floor(Math.random() * 9);
        if (box1 !== box2 && box1 !== box3 && box2 !== box3) {
            break;
        }
    }
    //随机的三个盒子改变颜色
    box[box1].style.backgroundColor = changeColor();
    box[box2].style.backgroundColor = changeColor();
    box[box3].style.backgroundColor = changeColor();
}

function resent() {
    var box = document.getElementsByClassName("box");
    for (var i = 0; i < 9; i++) {
        box[i].style.backgroundColor = "orange";
    }
}
//得到三个随机颜色
function changeColor() {
    var r = Math.floor(Math.random() * 255);
    var g = Math.floor(Math.random() * 255);
    var b = Math.floor(Math.random() * 255);
    return "rgb(" + r + "," + g + "," + b +")";
}

var time;
function twinkle() {
    time = setInterval(getBox(), 1000);
}

function stop() {
    clearInterval(time);
    resent();
}

编辑于2024-11-08