JavaScript获取页面滚动条尺寸

方法1&＃xff1a;

function getScrollbarHeight()
{var spacer &＃61; document.createElement("div");spacer.setAttribute("style", "position: fixed; margin: 0px; padding: 0px; border: none; visibility: hidden; top: 0px; left: 0px; width: 1px; height: 100%; z-index: -1;");document.body.appendChild(spacer);var sbHeight &＃61; window.innerHeight - spacer.offsetHeight;document.body.removeChild(spacer);return sbHeight > 0 && sbHeight <40 ? sbHeight : 0;
}

方法2&＃xff1a;

function getScrollbarWidth()
{var spacer &＃61; document.createElement("div");spacer.style.cssText &＃61; &＃39;position:absolute;top:-999px;width:100px;height:100px;overflow:scroll;&＃39;;document.body.appendChild(spacer);var sbW &＃61; spacer.offsetWidth - spacer.clientWidth;document.body.removeChild(spacer);return sbW;
}