let dom = DOMRect.fromRect({
width:100,
height:100,
x:20,
y:200
})
console.log('dom==',dom)
<style>
* {
margin: 0;
padding: 0;
}
.box {
width: 400px;
height: 200px;
margin: 100px auto;
border: 1px solid #ccc;
}
.child {
width: 200px;
height: 100px;
margin: 20px;
border: 1px solid #ccc;
}
</style>
<body>
<div class="box">
<div class="child">
child
</div>
</div>
</body>
<script>
const childDom = document.querySelector('.child');
console.log(childDom.getBoundingClientRect());
// --- 相对于视口左上角的位置，均是 numer ---
// top: 100 --- 盒子上边框距离视口顶部的距离
// bottom: 302 --- 盒子底边框距离视口顶部的距离 = top + height
// left: 394 --- 盒子左边框距离视口左侧的距离
// right: 796 --- 盒子右边框距离视口左侧的距离 = left + width
// x: 394 --- 盒子左上角相对于视口左侧的距离
// y: 100 --- 盒子左上角相对于视口顶部的距离
// 盒子的宽高
// width: 402
// height: 202
</script>