我试图禁用父母的html/身体滚动条,而我正在使用一个灯箱。这里的主要词是disable。我不想用溢出来隐藏它。

这样做的原因是overflow: hidden会使站点跳转并占用原来滚动的区域。

我想知道是否有可能禁用滚动条,同时仍然显示它。


当前回答

我喜欢坚持使用“overflow: hidden”方法,只需添加与滚动条宽度相等的右填充。

通过lostsource获取滚动条宽度函数。

function getScrollbarWidth() {
    var outer = document.createElement("div");
    outer.style.visibility = "hidden";
    outer.style.width = "100px";
    outer.style.msOverflowStyle = "scrollbar"; // needed for WinJS apps

    document.body.appendChild(outer);

    var widthNoScroll = outer.offsetWidth;
    // force scrollbars
    outer.style.overflow = "scroll";

    // add innerdiv
    var inner = document.createElement("div");
    inner.style.width = "100%";
    outer.appendChild(inner);        

    var widthWithScroll = inner.offsetWidth;

    // remove divs
    outer.parentNode.removeChild(outer);

    return widthNoScroll - widthWithScroll;
}

当显示覆盖时,在html中添加"noscroll"类,并在body中添加padding-right:

$(html).addClass("noscroll");
$(body).css("paddingRight", getScrollbarWidth() + "px");

当隐藏时,删除类和填充:

$(html).removeClass("noscroll");
$(body).css("paddingRight", 0);

noscroll样式是这样的:

.noscroll { overflow: hidden; }

注意,如果你有任何带有position:fixed的元素,你也需要为这些元素添加填充。

其他回答

位置:固定;解决方案有一个缺点-当应用此样式时,页面跳转到顶部。Angular的材质对话框有一个很好的解决方案,他们通过将定位应用到html元素来伪造滚动位置。

下面是我修改后的算法仅垂直滚动。左滚动块以完全相同的方式完成。

// This class applies the following styles:
// position: fixed;
// overflow-y: scroll;
// width: 100%;
const NO_SCROLL_CLASS = "bp-no-scroll";

const coerceCssPixelValue = value => {
  if (value == null) {
    return "";
  }

  return typeof value === "string" ? value : `${value}px`;
};

export const blockScroll = () => {
  const html = document.documentElement;
  const documentRect = html.getBoundingClientRect();
  const { body } = document;

  // Cache the current scroll position to be restored later.
  const cachedScrollPosition =
    -documentRect.top || body.scrollTop || window.scrollY || document.scrollTop || 0;

  // Cache the current inline `top` value in case the user has set it.
  const cachedHTMLTop = html.style.top || "";

  // Using `html` instead of `body`, because `body` may have a user agent margin,
  // whereas `html` is guaranteed not to have one.
  html.style.top = coerceCssPixelValue(-cachedScrollPosition);

  // Set the magic class.
  html.classList.add(NO_SCROLL_CLASS);

  // Return a function to remove the scroll block.
  return () => {
    const htmlStyle = html.style;
    const bodyStyle = body.style;

    // We will need to seamlessly restore the original scroll position using
    // `window.scroll`. To do that we will change the scroll behavior to `auto`.
    // Here we cache the current scroll behavior to restore it later.
    const previousHtmlScrollBehavior = htmlStyle.scrollBehavior || "";
    const previousBodyScrollBehavior = bodyStyle.scrollBehavior || "";

    // Restore the original inline `top` value.
    htmlStyle.top = cachedHTMLTop;

    // Remove the magic class.
    html.classList.remove(NO_SCROLL_CLASS);

    // Disable user-defined smooth scrolling temporarily while we restore the scroll position.
    htmlStyle.scrollBehavior = bodyStyle.scrollBehavior = "auto";

    // Restore the original scroll position.
    window.scroll({
      top: cachedScrollPosition.top
    });

    // Restore the original scroll behavior.
    htmlStyle.scrollBehavior = previousHtmlScrollBehavior;
    bodyStyle.scrollBehavior = previousBodyScrollBehavior;
  };
};

逻辑非常简单,如果不考虑某些边界情况,还可以进一步简化。例如,这是我使用的:

export const blockScroll = () => {
  const html = document.documentElement;
  const documentRect = html.getBoundingClientRect();
  const { body } = document;
  const screenHeight = window.innerHeight;

  // Only do the magic if document is scrollable
  if (documentRect.height > screenHeight) {
    const cachedScrollPosition =
      -documentRect.top || body.scrollTop || window.scrollY || document.scrollTop || 0;

    html.style.top = coerceCssPixelValue(-cachedScrollPosition);

    html.classList.add(NO_SCROLL_CLASS);

    return () => {
      html.classList.remove(NO_SCROLL_CLASS);

      window.scroll({
        top: cachedScrollPosition,
        behavior: "auto"
      });
    };
  }
};

粗糙但有效的方法是强制滚动回顶部,从而有效地禁用滚动:

var _stopScroll = false;
window.onload = function(event) {
    document.onscroll = function(ev) {
        if (_stopScroll) {
            document.body.scrollTop = "0px";
        }
    }
};

打开灯箱时升起旗子,关闭灯箱时降下旗子。

现场测试用例。

我有一些其他固定的元素在页面和设置主体的位置固定导致了一堆其他问题,所以我做了一个hack的方式:

const scrollbarWidth = window.innerWidth - document.documentElement.clientWidth;

// on opening modal
document.body.style.overflow = "hidden"
document.body.style.paddingRight = `${scrollbarWidth}px`

// on closing modal
document.body.style.overflow = "unset",
document.body.style.paddingRight = "0px"

这个想法是添加一个与浏览器滚动条宽度相同的右填充,以模仿假滚动条并防止内容移动。

<div id="lightbox">在<body>元素中,因此当你滚动lightbox时,你也会滚动body。解决方案是不要将<body>元素扩展到100%以上,将长内容放在另一个div元素中,并在需要时使用overflow: auto为这个div元素添加滚动条。

html { 高度:100% } 身体{ 保证金:0; 高度:100% } #内容{ 高度:100%; 溢出:汽车; } # lightbox { 位置:固定; 上图:0; 左:0; 右:0; 底部:0; } < html > 身体< > <div id="content">much content</div> . < div id = " lightbox " > lightbox < div > 身体< / > < / html >

现在,滚动灯箱(以及主体)没有效果,因为主体不超过屏幕高度的100%。

这是我们的解。简单地保存覆盖打开时的滚动位置,在用户试图滚动页面时滚动回保存的位置,并在覆盖关闭时关闭侦听器。

它在IE上有点不稳定,但在Firefox/Chrome上却很有魅力。

var body = $("body"), overlay = $("#overlay"), overlayShown = false, overlayScrollListener = null, overlaySavedScrollTop = 0, overlaySavedScrollLeft = 0; function showOverlay() { overlayShown = true; // Show overlay overlay.addClass("overlay-shown"); // Save scroll position overlaySavedScrollTop = body.scrollTop(); overlaySavedScrollLeft = body.scrollLeft(); // Listen for scroll event overlayScrollListener = body.scroll(function() { // Scroll back to saved position body.scrollTop(overlaySavedScrollTop); body.scrollLeft(overlaySavedScrollLeft); }); } function hideOverlay() { overlayShown = false; // Hide overlay overlay.removeClass("overlay-shown"); // Turn scroll listener off if (overlayScrollListener) { overlayScrollListener.off(); overlayScrollListener = null; } } // Click toggles overlay $(window).click(function() { if (!overlayShown) { showOverlay(); } else { hideOverlay(); } }); /* Required */ html, body { margin: 0; padding: 0; height: 100%; background: #fff; } html { overflow: hidden; } body { overflow-y: scroll; } /* Just for looks */ .spacer { height: 300%; background: orange; background: linear-gradient(#ff0, #f0f); } .overlay { position: fixed; top: 20px; bottom: 20px; left: 20px; right: 20px; z-index: -1; background: #fff; box-shadow: 0 0 5px rgba(0, 0, 0, .3); overflow: auto; } .overlay .spacer { background: linear-gradient(#88f, #0ff); } .overlay-shown { z-index: 1; } <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <h1>Top of page</h1> <p>Click to toggle overlay. (This is only scrollable when overlay is <em>not</em> open.)</p> <div class="spacer"></div> <h1>Bottom of page</h1> <div id="overlay" class="overlay"> <h1>Top of overlay</h1> <p>Click to toggle overlay. (Containing page is no longer scrollable, but this is.)</p> <div class="spacer"></div> <h1>Bottom of overlay</h1> </div>