我正在使用scrollTo jQuery插件,想知道是否有可能通过Javascript暂时禁用窗口元素上的滚动?我想禁用滚动的原因是,当你滚动而scrollTo是动画,它变得非常难看;)

当然,我可以做$("body").css("overflow", "hidden");然后当动画停止时把它放回自动,但如果滚动条仍然可见但不活跃会更好。


当前回答

最简单的方法是:

$("body").css("overflow", "hidden"); // Remove the scroll bar temporarily

要撤消它:

$("body").css("overflow", "auto");

很容易实现,但唯一的缺点是:

如果页面是居中对齐的(水平),它会向左跳一点。

这是由于滚动条被移除,并且视口变得更宽。

其他回答

下面的解决方案是基本的纯JavaScript(没有jQuery):

function disableScrolling(){
    var x=window.scrollX;
    var y=window.scrollY;
    window.onscroll=function(){window.scrollTo(x, y);};
}

function enableScrolling(){
    window.onscroll=function(){};
}

Galambalazs的解决方案很棒!它在Chrome和Firefox中都非常适合我。它还可以扩展,以防止来自浏览器窗口的任何默认事件。 假设你在画布上做一个应用。你可以这样做:

var events = {
  preventDefault: function(e) {
    e = e || window.event;
    if (e.preventDefault) e.preventDefault();
    e.returnValue = false;  
  },

  //spacebar: 32, pageup: 33, pagedown: 34, end: 35, home: 36,
  //left: 37, up: 38, right: 39, down: 40
  keys: [32, 33, 34, 35, 36, 37, 38, 39, 40],
  keydown: function(e) {
    for (var i = events.keys.length; i--;) {
      if (e.keyCode === events.keys[i]) {
        events.preventDefault(e);
        return;
      }
    }
  },

  wheel: function(e) {
    events.preventDefault(e);
  },

  disable: function() {
    if (window.addEventListener) {
      window.addEventListener('DOMMouseScroll', events.wheel, false);
    }
    window.onmousewheel = document.onmousewheel = events.wheel;
    document.onkeydown = helpers.events.keydown;
  },

  enable: function() {
    if (window.removeEventListener) {
      window.removeEventListener('DOMMouseScroll', events.wheel, false);
    }
    window.onmousewheel = document.onmousewheel = document.onkeydown = null;  
  }
}

然后在你的应用程序中,假设你要处理你自己的事件,比如鼠标、键盘、触摸事件等等。你可以在鼠标进入画布时禁用默认事件,并在鼠标离开时重新启用它们:

function setMouseEvents(canvas) {
  var useCapture = false;

  //Mouse enter event
  canvas.addEventListener('mouseenter', function(event) {
    events.disable();
  }, useCapture);

  //Mouse leave event
  canvas.addEventListener('mouseleave', function(event) {
    events.enable();
  }, useCapture);
}

你甚至可以禁用右键菜单与此hack:

function disableRightClickMenu(canvas) {
  var my_gradient = canvas.context.createLinearGradient(0, 0, 0, 225);
  my_gradient.addColorStop(0, "white");
  my_gradient.addColorStop(1, "white");
  canvas.context.fillStyle = my_gradient;
  canvas.context.fillRect(0, 0, canvas.width, canvas.height);
  canvas.oncontextmenu = function() { return false; };
}

不,我不会使用事件处理,因为:

不是所有的事件都能保证到达身体, 选择文本并向下移动实际上是在滚动文档, 如果在分离某事物的阶段出了差错,你就完蛋了。

我已经咬了这个通过制作一个隐藏的文本区域复制粘贴动作,猜什么,页面滚动每当我做复制,因为内部我必须在我调用document.execCommand('copy')之前选择文本区域。

不管怎样,这就是我的方式,注意setTimeout():

document.body.setAttribute('style','overflow:hidden;');
// do your thing...
setTimeout(function(){document.body.setAttribute('style','overflow:visible;');}, 500);

当滚动条暂时消失时,会出现动量闪烁,但这是可以接受的。

我刚刚整理的一些东西:

斯菲德尔

document.onwheel = function(e) { // get the target element target = e.target; // the target element might be the children of the scrollable element // e.g., "li"s inside an "ul", "p"s inside a "div" etc. // we need to get the parent element and check if it is scrollable // if the parent isn't scrollable, we move up to the next parent while (target.scrollHeight <= target.clientHeight) { // while looping parents, we'll eventually reach document.body // since body doesn't have a parent, we need to exit the while loop if (target == document.body) { break; } target = target.parentElement; } // we want this behaviour on elements other than the body if (target != document.body) { // if the scrollbar is at the top and yet if it still tries to scroll up // we prevent the scrolling if (target.scrollTop <= 0 && e.deltaY < 0) { e.preventDefault(); } // similarly, if the scrollbar is at the bottom and it still tries to scroll down // we prevent it else if (target.clientHeight + target.scrollTop >= target.scrollHeight && e.deltaY > 0) { e.preventDefault(); } } }; body { background: gainsboro; } #box { width: 300px; height: 600px; padding: 5px; border: 1px solid silver; margin: 50px auto; background: white; overflow: auto; } <div id="box"> <p> Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. </p> <p> Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. </p> <p> Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. </p> <p> Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. </p> </div>

我一直在寻找这个问题的解决方案,但对上面的任何解决方案都不满意(在写这个答案时),所以我想出了这个解决方案。

CSS

.scrollDisabled {   
    position: fixed;
    margin-top: 0;// override by JS to use acc to curr $(window).scrollTop()
    width: 100%;
}

JS

var y_offsetWhenScrollDisabled=0;

function disableScrollOnBody(){
    y_offsetWhenScrollDisabled= $(window).scrollTop();
    $('body').addClass('scrollDisabled').css('margin-top', -y_offsetWhenScrollDisabled);
}
function enableScrollOnBody(){
    $('body').removeClass('scrollDisabled').css('margin-top', 0);
    $(window).scrollTop(y_offsetWhenScrollDisabled);
}