/* =============================
 * Disable / Enable Page Scroll
 * when Bootstrap Modals are
 * shown / hidden
 * ============================= */

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

function theMouseWheel(e) {
  preventDefault(e);
}

function disable_scroll() {
  if (window.addEventListener) {
      window.addEventListener('DOMMouseScroll', theMouseWheel, false);
  }
  window.onmousewheel = document.onmousewheel = theMouseWheel;
}

function enable_scroll() {
    if (window.removeEventListener) {
        window.removeEventListener('DOMMouseScroll', theMouseWheel, false);
    }
    window.onmousewheel = document.onmousewheel = null;  
}

$(function () {
  // disable page scrolling when modal is shown
  $(".modal").on('show', function () { disable_scroll(); });
  // enable page scrolling when modal is hidden
  $(".modal").on('hide', function () { enable_scroll(); });
});

这是TypeScript中的一种解决方案，可以轻松地阻止事件扩展，也可以处理移动设备。当禁用垂直滚动条时，这也不会导致水平跳转。 只需使用底部的导出函数，例如任何HTML元素上的onclick处理程序。如果不是在NodeJS环境中运行，只需删除该进程。客户端检查。

/**
 * Handles scroll events for modal content
 */

const events = [
  'DOMMouseScroll',
  'mousewheel',
  'wheel',
  'touchmove',
  'keydown',
  'mousedown',
  'scroll',
];

const preventDefault = (e: Event) => {
  e.preventDefault();
  e.stopPropagation();
  return false;
};

let currentY: number;

const disableScroll = () => {
  currentY = window.scrollY;

  events.forEach((event) => {
    window.addEventListener(event, preventDefault, {
      passive: false,
    });
  });

  const bodyStyle = document.body.style;
  bodyStyle.setProperty('touch-action', 'none');
  bodyStyle.setProperty('position', 'fixed');
  bodyStyle.setProperty('overflow-y', 'scroll');
  bodyStyle.setProperty('width', '100%');
  bodyStyle.setProperty('top', `-${currentY}px`);
};

const enableScroll = () => {
  events.forEach((event) => {
    window.removeEventListener(event, preventDefault);
  });

  const bodyStyle = document.body.style;
  bodyStyle.removeProperty('touch-action');
  bodyStyle.removeProperty('position');
  bodyStyle.removeProperty('overflow-y');
  bodyStyle.removeProperty('width');
  bodyStyle.removeProperty('top');
  window.scroll(0, currentY);
};

/**
 * Makes a component (e.g. popup) modal
 */
export const makeModal = () => {
  if (process.client) {
    disableScroll();
  }
};

/**
 * Makes a component (e.g. popup) non-modal
 */
export const makeNonModal = () => {
  if (process.client) {
    enableScroll();
  }
};

你可以试着设置body size为window size, overflow:当modal打开时隐藏

简单地隐藏身体溢出，它使身体不滚动。隐藏模式时，将其恢复为自动模式。

代码如下:

$('#adminModal').modal().on('shown', function(){
    $('body').css('overflow', 'hidden');
}).on('hidden', function(){
    $('body').css('overflow', 'auto');
})

这是我的香草JS解决方案基于@jpap jquery:

let bodyElement = document.getElementsByTagName('body')[0];

// lock body scroll
    let width = bodyElement.scrollWidth;
    bodyElement.classList.add('overflow-hidden');
    bodyElement.style.width = width + 'px';

// unlock body scroll
    bodyElement.classList.remove('overflow-hidden');
    bodyElement.style.width = 'auto';

如果modal的高度/宽度为100%，“mouseenter/leave”可以很容易地启用/禁用滚动。这对我来说真的很管用:

var currentScroll=0;
function lockscroll(){
    $(window).scrollTop(currentScroll);
} 
$("#myModal").mouseenter(function(){
    currentScroll=$(window).scrollTop();
    $(window).bind('scroll',lockscroll); 
}).mouseleave(function(){
    currentScroll=$(window).scrollTop();
    $(window).unbind('scroll',lockscroll); 
});