css_js_page/mouse.html at master · Qionglu735/css_js_page · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Mouse</title>
</head>
<body>
<div class="ground">
    <span class="mouse" id="mouse-a"></span>
    <span class="mouse" id="mouse-b"></span>
    <span class="mouse" id="mouse-c"></span>
</div>
</body>
</html>

<style>
    :root {
        background-color: #000000;
    }
    .ground {
        width: 300px;
    }
    .mouse {
        display: block;
        background-color: #777777;
        width: 50px;
        height: 50px;
        margin-bottom: 5px;
    }
</style>

<script src="jquery-3.5.1.min.js"></script>
<script>
let set_left = function(item) {
    item.css("margin-left", "");
    item.css("margin-right", "");
}
let set_middle = function(item) {
    item.css("margin-left", "auto");
    item.css("margin-right", "auto");
}
let set_right = function(item) {
    item.css("margin-left", "auto");
    item.css("margin-right", "");
}
$(document).ready(function() {
    let span_list = [$("#mouse-a"), $("#mouse-b"), $("#mouse-c")];
    let span_status = {};
    for(let i of span_list) {
        let seed = Math.floor(Math.random() * 3);
        span_status[i.attr("id")] = seed;
        if(seed === 0) {
            set_left(i)
        }
        else if(seed === 1) {
            set_middle(i)
        }
        else if(seed === 2) {
            set_right(i)
        }
    }

    $(".mouse").on("mouseenter", function(event) {
        let seed = -1;
        do {
            seed = Math.floor(Math.random() * 3);
        }
        while(seed === span_status[$(this).attr("id")])
        span_status[$(this).attr("id")] = seed;
        if(seed === 0) {
            set_left($(this))
        }
        else if(seed === 1) {
            set_middle($(this))
        }
        else if(seed === 2) {
            set_right($(this))
        }
    })
});
</script>