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Whether the offsetwidth includes scroll bars

2022-06-23 20:45:00 【It workers】

About offsetWidth For the basic usage of js offsetWidth A chapter .

Here is a code example to verify offsetWidth Whether to include the width of the scroll bar .

The code example is as follows :

<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<title> Front end tribe </title>
<style>
#top,#bottom{
  width:200px;
  height:100px;
  background:red;
  overflow:auto;
  margin:50px;
}
#top_child,#bottom_child {
  width:20px;
  background:blue;
}
#top_child{
  height:160px;
}
#bottom_child{
  height:60px;
}
</style>
<script>
window.onload = function () {antzone
  var oantzone = document.getElementById("antzone");
  var otop = document.getElementById("top");
  var obottom = document.getElementById("bottom");
  var str = "";
  str = str + "top Elemental offsetWidth:" + otop.offsetWidth+"<br/>";
  str = str + "bottom Elemental offsetWidth:" + obottom.offsetWidth;
  oantzone.innerHTML = str;
}
</script>
</head>
<body>
<div id="top">
  <div id="top_child"></div>
</div>
<div id="bottom">
  <div id="bottom_child"></div>
</div>
<div id="antzone"></div>
</body>
</html>

It can be proved by the above code ,offsetWidth It includes the size of the scroll bar .

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