jquery实现滑动表格所选区域变色

先看效果（请忽略样式）
在这里插入图片描述
废话不多说，上代码
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        table,
        tr,
        td {
    
    
            border: 1px solid red;
            text-align: center;

        }

        .hover {
    
    
            background: red;
            color: aliceblue;
        }


        .fhover {
    
    
            background: #666;
            color: aliceblue;
        }
    </style>
</head>

<body>
    <table id="table">
        <tr>
            <td>1</td>
            <td>2</td>
            <td>3</td>
            <td>1</td>
            <td>2</td>
            <td>3</td>
        </tr>
        <tr>
            <td>a</td>
            <td>b</td>
            <td>c</td>
            <td>1</td>
            <td>2</td>
            <td>3</td>
        </tr>
        <tr>
            <td>aa</td>
            <td>ss</td>
            <td>dd</td>
            <td>1</td>
            <td>2</td>
            <td>3</td>
        </tr>
        <tr>
            <td>aa</td>
            <td>sss</td>
            <td>dd</td>
            <td>1</td>
            <td>2</td>
            <td>3</td>
        </tr>
        <tr>
            <td>aa</td>
            <td>sss</td>
            <td>dd</td>
            <td>1</td>
            <td>2</td>
            <td>3</td>
        </tr>
        <tr>
            <td>aa</td>
            <td>sss</td>
            <td>dd</td>
            <td>1</td>
            <td>2</td>
            <td>3</td>
        </tr>
    </table>
</body>

</html>
<script src="http://code.jquery.com/jquery-2.1.4.min.js"></script>
<script>
    $(document).ready(function () {
    
    
        $("#table").find("td").mouseover(function () {
    
    
            var hang = $(this).parent().prevAll().length;
            var lie = $(this).prevAll().length;
            console.log(hang, lie)
            for (let i = 0; i <= hang; i++) {
    
    
                for (let k = 0; k <= lie; k++) {
    
    
                    $("#table tr:eq(" + i + ") td:eq(" + k + ")").addClass("hover")
                }
            }
            for (let m = 0; m <= hang; m++) {
    
    
                for (let j = 0; j <= lie; j++) {
    
    
                    $("tr:eq(" + m + ") td:eq(" + j + ")").addClass("hover")
                }
            }
            $("#table").find("td").mouseout(function () {
    
    
                for (let i = 0; i <= hang; i++) {
    
    
                    for (let k = 0; k <= lie; k++) {
    
    
                        $("#table tr:eq(" + i + ") td:eq(" + k + ")").removeClass("hover")
                    }
                }
                for (let m = 0; m <= hang; m++) {
    
    
                    for (let j = 0; j <= lie; j++) {
    
    
                        $("tr:eq(" + m + ") td:eq(" + j + ")").removeClass("hover")

                    }
                }

            })

        })

    })
</script>
大概思路：
先获取鼠标滑动的行，列坐标
通过循环给坐标增加已经设置好css样式的class名
原生js和vue项目也大同小异
jquery实现滑动表格所选区域变色

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