javascript - 如何从javascript获取内联 block 字段集的显示宽度

Question

如果你有一个带有 display: inline-block 的字段集，它的宽度取决于它包含的元素。您可以看到它，但假设:

<fieldset id='fs' style='display: inline-block'>
  <input type=number>
</fieldset>

<script>
  var fs=document.getElementById("fs");
  console.log("fs.width:",fs.width);
</script>

唯一的输出将是:

fs.width: undefined

在尝试了很多东西之后，我终于能够像这样得到它:

<script>
  var fs=document.getElementById("fs");
  var fsrects=fs.getClientRects();
  var fswidth=fsrects[0].right-fsrects[0].left;
  console.log("fswidth:",fswidth);
</script>

然后输出是

fswidth: 98.6640625

一定有更简单的方法!帮忙!!!

Answer 1

您可能正在寻找 offsetWidth .

The HTMLElement.offsetWidth read-only property returns the layout width of an element. Typically, an element's offsetWidth is a measurement which includes the element borders, the element horizontal padding, the element vertical scrollbar (if present, if rendered) and the element CSS width.

  var fs=document.getElementById("fs");
  console.log("fs.width:",fs.offsetWidth);

<fieldset id='fs' style='display: inline-block'>
  <input type=number>
</fieldset>