我有一个小的“浮动工具箱”-一个div的位置:fixed;溢出:汽车。
工作得很好。
但是当滚动到盒子里面(用鼠标滚轮)并到达底部或顶部时，父元素“接管”“滚动请求”:工具箱后面的文档滚动。
-这是恼人的，而不是用户“要求”。
我正在使用jQuery，并认为我可以用event.stoppropagation()停止这种行为:
$(" #工具箱”)。Scroll (function(event){event.stoppropagation()});
它确实进入了函数，但传播仍然发生(文档滚动)
在SO(和谷歌)上搜索这个话题是非常困难的，所以我不得不问:
如何防止滚动事件的传播/冒泡?
编辑:
工作解决方案感谢amustill(和Brandon Aaron的鼠标轮插件在这里:
https://github.com/brandonaaron/jquery-mousewheel/raw/master/jquery.mousewheel.js
$(".ToolPage").bind('mousewheel', function(e, d)
var t = $(this);
if (d > 0 && t.scrollTop() === 0) {
e.preventDefault();
}
else {
if (d < 0 && (t.scrollTop() == t.get(0).scrollHeight - t.innerHeight())) {
e.preventDefault();
}
}
});
上面的方法不是那么自然，经过一些谷歌我找到了一个更好的解决方案，不需要jQuery。参见[1]和演示[2]。
var element = document.getElementById('uf-notice-ul');
var isMacWebkit = (navigator.userAgent.indexOf("Macintosh") !== -1 &&
navigator.userAgent.indexOf("WebKit") !== -1);
var isFirefox = (navigator.userAgent.indexOf("firefox") !== -1);
element.onwheel = wheelHandler; // Future browsers
element.onmousewheel = wheelHandler; // Most current browsers
if (isFirefox) {
element.scrollTop = 0;
element.addEventListener("DOMMouseScroll", wheelHandler, false);
}
// prevent from scrolling parrent elements
function wheelHandler(event) {
var e = event || window.event; // Standard or IE event object
// Extract the amount of rotation from the event object, looking
// for properties of a wheel event object, a mousewheel event object
// (in both its 2D and 1D forms), and the Firefox DOMMouseScroll event.
// Scale the deltas so that one "click" toward the screen is 30 pixels.
// If future browsers fire both "wheel" and "mousewheel" for the same
// event, we'll end up double-counting it here. Hopefully, however,
// cancelling the wheel event will prevent generation of mousewheel.
var deltaX = e.deltaX * -30 || // wheel event
e.wheelDeltaX / 4 || // mousewheel
0; // property not defined
var deltaY = e.deltaY * -30 || // wheel event
e.wheelDeltaY / 4 || // mousewheel event in Webkit
(e.wheelDeltaY === undefined && // if there is no 2D property then
e.wheelDelta / 4) || // use the 1D wheel property
e.detail * -10 || // Firefox DOMMouseScroll event
0; // property not defined
// Most browsers generate one event with delta 120 per mousewheel click.
// On Macs, however, the mousewheels seem to be velocity-sensitive and
// the delta values are often larger multiples of 120, at
// least with the Apple Mouse. Use browser-testing to defeat this.
if (isMacWebkit) {
deltaX /= 30;
deltaY /= 30;
}
e.currentTarget.scrollTop -= deltaY;
// If we ever get a mousewheel or wheel event in (a future version of)
// Firefox, then we don't need DOMMouseScroll anymore.
if (isFirefox && e.type !== "DOMMouseScroll") {
element.removeEventListener("DOMMouseScroll", wheelHandler, false);
}
// Don't let this event bubble. Prevent any default action.
// This stops the browser from using the mousewheel event to scroll
// the document. Hopefully calling preventDefault() on a wheel event
// will also prevent the generation of a mousewheel event for the
// same rotation.
if (e.preventDefault) e.preventDefault();
if (e.stopPropagation) e.stopPropagation();
e.cancelBubble = true; // IE events
e.returnValue = false; // IE events
return false;
}
[1] https://dimakuzmich.wordpress.com/2013/07/16/prevent-scrolling-of-parent-element-with-javascript/
[2] http://jsfiddle.net/dima_k/5mPkB/1/
Angular JS指令
我必须封装一个角度指令。以下是其他答案的混搭。在Chrome和Internet Explorer 11上进行了测试。
var app = angular.module('myApp');
app.directive("preventParentScroll", function () {
return {
restrict: "A",
scope: false,
link: function (scope, elm, attr) {
elm.bind('mousewheel', onMouseWheel);
function onMouseWheel(e) {
elm[0].scrollTop -= (e.wheelDeltaY || (e.originalEvent && (e.originalEvent.wheelDeltaY || e.originalEvent.wheelDelta)) || e.wheelDelta || 0);
e.stopPropagation();
e.preventDefault();
e.returnValue = false;
}
}
}
});
使用
<div prevent-parent-scroll>
...
</div>
希望这能帮助下一个从谷歌搜索到这里的人。
这在AngularJS中是有效的。
在Chrome和Firefox上测试。
.directive('stopScroll', function () {
return {
restrict: 'A',
link: function (scope, element, attr) {
element.bind('mousewheel', function (e) {
var $this = $(this),
scrollTop = this.scrollTop,
scrollHeight = this.scrollHeight,
height = $this.height(),
delta = (e.type == 'DOMMouseScroll' ?
e.originalEvent.detail * -40 :
e.originalEvent.wheelDelta),
up = delta > 0;
var prevent = function() {
e.stopPropagation();
e.preventDefault();
e.returnValue = false;
return false;
};
if (!up && -delta > scrollHeight - height - scrollTop) {
// Scrolling down, but this will take us past the bottom.
$this.scrollTop(scrollHeight);
return prevent();
} else if (up && delta > scrollTop) {
// Scrolling up, but this will take us past the top.
$this.scrollTop(0);
return prevent();
}
});
}
};
})
如果有人还在寻找一个解决方案，下面的插件做的工作http://mohammadyounes.github.io/jquery-scrollLock/
它完全解决了在给定容器内锁定鼠标滚轮滚动的问题，防止它传播到父元素。
不改变滚轮滚动速度，不会影响用户体验。无论操作系统的鼠标滚轮垂直滚动速度如何，你都可以得到相同的行为(在Windows上，它可以设置为一个屏幕或一行，最多100行每个凹槽)。
演示:http://mohammadyounes.github.io/jquery-scrollLock/example/
来源:https://github.com/MohammadYounes/jquery-scrollLock
