为什么这里点击第一个div输出1而不是0呢？怎么发生了错位？

来源：2-3 鼠标事件-mousedown、mouseup

慕UI4371066

2019-03-05 19:04:46

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title>点击事件</title>
    <style type="text/css">
    div {
        float: left;
        margin: 10px;
        width: 100px;
        height: 100px;
        color: #fff;
        font-size: 50px;
        text-align: center;
        line-height: 100px;
        text-indent: -9999px;
        background-color: #333;
    }
    </style>
</head>

<body>
    <h1>添加事件处理</h1>
    <div>43</div>
    <div>21</div>
    <div>56</div>
    <div>16</div>
    <div>89</div>
    <div>94</div>
    <div>46</div>
    <div>26</div>
    <div>67</div>
    <div>90</div>
    <div>25</div>
    <div>10</div>
    <div>84</div>
    <div>76</div>
    <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>
    <script>
        $(document).ready(function(){
            $('div').click(function(){
                console.log($(this).index());
                // $('div').eq($(this).index()).css({'text-indent':'0'});
            });
        });
    </script>
</body>
</html>

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