製作視窗拖拉顯示元素寬高工具

Posted on 2018-04-11 Edited on 2023-11-24 In Side Projects Views: Disqus:

我也想自製一個「視窗拖拉顯示元素寬高」工具，

好方便我在未來作響應式設計能夠快速知道元素的寬高。

<!doctype html>
<html lang="en">
<head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
    <title>Hello, world!</title>
    <style>
        .test {
            width: 100%;
            height: 200px;
            border: 1px red solid;
        }
        .get-xy {
            text-align: center;
            text-overflow: ellipsis;
            white-space: nowrap;
            overflow: hidden;
            background-color: rgba(0, 123, 255, 0.17);
        }
            .get-xy::before {
                content: "";
                height: 100%;
                width: 0;
                display: inline-block;
                vertical-align: middle;
            }
        .show-xy {
            vertical-align: middle;
            font-size: 2rem;
            color: rgba(0, 0, 0, 0.5);
        }
    </style>
</head>
<body>
    <div class="container-fluid">
        <div class="row">
            <div class="col-8">
                <div class="test get-xy"></div>
            </div>
            <div class="col-4">
                <div class="test get-xy"></div>
            </div>
        </div>
    </div>
    <script>
        window.addEventListener("load", funcLoad);
        window.addEventListener("resize", funcResize);
        function funcLoad() {
            var measures = document.getElementsByClassName("get-xy");
            for (index in measures) {
                measures[index].innerHTML = measures[index].innerHTML + "<span class='show-xy'>" + measures[index].offsetWidth + "X" + measures[index].offsetHeight + "</span>";
            }
        }
        function funcResize() {
            var showXY = document.getElementsByClassName("show-xy");
            var length_showXY = showXY.length;
            for (i = 0; i < length_showXY; i++) {
                showXY[0].remove();
            }
            var measures = document.getElementsByClassName("get-xy");
            for (index in measures) {
                measures[index].innerHTML = measures[index].innerHTML + "<span class='show-xy'>" + measures[index].offsetWidth + "X" + measures[index].offsetHeight + "</span>";
            }
        }
    </script>
    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
</body>
</html>