// Create the measurement node
var scrollDiv = document.createElement("div");
scrollDiv.className = "scrollbar-measure";
document.body.appendChild(scrollDiv);
// Get the scrollbar width
var scrollbarWidth = scrollDiv.offsetWidth - scrollDiv.clientWidth;
console.info(scrollbarWidth); // Mac: 15
// Delete the DIV
document.body.removeChild(scrollDiv);
#scrollbar-helper {
// Hide it beyond the borders of the browser
position: absolute;
top: -100%;
// Make sure the scrollbar is always visible
overflow: scroll;
}
然后使用 Javascript 检查 #scrollbar-helper的大小:
var scrollbarWidth = document.getElementById('scrollbar-helper').offsetWidth;
var scrollbarHeight = document.getElementById('scrollbar-helper').offsetHeight;
function getScrollbarWidth(): number {
// Creating invisible container
const outer = document.createElement('div');
outer.style.visibility = 'hidden';
outer.style.overflow = 'scroll'; // forcing scrollbar to appear
outer.style.msOverflowStyle = 'scrollbar'; // needed for WinJS apps
document.body.appendChild(outer);
// Creating inner element and placing it in the container
const inner = document.createElement('div');
outer.appendChild(inner);
// Calculating difference between container's full width and the child width
const scrollbarWidth = (outer.offsetWidth - inner.offsetWidth);
// Removing temporary elements from the DOM
outer.parentNode.removeChild(outer);
return scrollbarWidth;
}
// Create the measurement node
var scrollDiv = document.createElement("div");
scrollDiv.className = "scrollbar-measure";
document.body.appendChild(scrollDiv);
// Get the scrollbar width
var scrollbarWidth = scrollDiv.offsetWidth - scrollDiv.clientWidth;
console.info(scrollbarWidth); // Mac: 15
// Delete the DIV
document.body.removeChild(scrollDiv);