怎么判断两个平行的dom是否包含？

  • Z时代
  • 2024-03-15
  • 分类：IT

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style type="text/css">
        * {
            padding: 0;
            margin: 0;
        }
        html, body {
            height: 100vh;
        }
        .container {
            position: relative;
            height: 100vh;
        }
        .wrap {
            position: relative;
            width: 1200px;
            height: 600px;
        }
        .mark {
            position: absolute;
            width: 400px;
            height: 400px;
            background: gold;
            opacity: 0.3;
            left: 0px;
            top: 0;
        }
        .wrap-item {
            position: absolute;
        }
        .item1 {
            width: 100px;
            height: 50px;
            background-color: darkred;
            top: 10px;
            left: 20px;
        }
        .item2 {
            width: 50px;
            height: 100px;
            background-color: blue;
            top: 200px;
            left: 20px;
        }
        .item3 {
            width: 150px;
            height: 100px;
            background-color: #0ab8d3;
            top: 200px;
            left: 300px;
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="wrap">
            <div class="wrap-item item1">
                item1
            </div>
            <div class="wrap-item item2">
                item2
            </div>
            <div class="wrap-item item3">
                item3
            </div>
        </div>
        <div class="mark"></div>
    </div>
</body>
</html>

怎么判断两个平行的dom是否包含？
从上图中可以看出黄色背景mark包含了item1， item2但是不包含item3，请问应该怎么判断

回答：

function isContained(element, container) {
  const containerRect = container.getBoundingClientRect();
  const elementRect = element.getBoundingClientRect();
  return (
    elementRect.top >= containerRect.top &&
    elementRect.left >= containerRect.left &&
    elementRect.bottom <= containerRect.bottom &&
    elementRect.right <= containerRect.right
  );
}
const mark = document.querySelector(".mark");
const item1 = document.querySelector(".item1");
const item2 = document.querySelector(".item2");
const item3 = document.querySelector(".item3");
console.log("Item 1 is contained:", isContained(item1, mark));
console.log("Item 2 is contained:", isContained(item2, mark));
console.log("Item 3 is contained:", isContained(item3, mark));

以上是 怎么判断两个平行的dom是否包含？ 的全部内容， 来源链接： utcz.com/p/934233.html

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