如何获得浏览器的滚动条大小？

问题描述

如何在JavaScript中确定水平滚动条的高度或垂直滚动​​条的宽度？

How can I determine the height of a horizontal scrollbar, or the width of a vertical one, in JavaScript?

推荐答案

来自，我还没试过。让我知道它是否适合你。

From Alexandre Gomes Blog I have not tried it. Let me know if it works for you.

function getScrollBarWidth () {
  var inner = document.createElement('p');
  inner.style.width = "100%";
  inner.style.height = "200px";

  var outer = document.createElement('div');
  outer.style.position = "absolute";
  outer.style.top = "0px";
  outer.style.left = "0px";
  outer.style.visibility = "hidden";
  outer.style.width = "200px";
  outer.style.height = "150px";
  outer.style.overflow = "hidden";
  outer.appendChild (inner);

  document.body.appendChild (outer);
  var w1 = inner.offsetWidth;
  outer.style.overflow = 'scroll';
  var w2 = inner.offsetWidth;
  if (w1 == w2) w2 = outer.clientWidth;

  document.body.removeChild (outer);

  return (w1 - w2);
};

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