Javascript 输入滚动位置。您需要从以下位置下载：

假设具有以下HTML，并且希望在页脚可见时发出警报：

<section id="container">
    <aside id="sidebar">
        <p>
            Scroll up and down to alert the footer visibility by color:
        </p>
        <ul>
            <li><span class="blue">Blue</span> = footer <u>not visible</u>;</li>
            <li><span class="yellow">Yellow</span> = footer <u>visible</u>;</li>
        </ul>
        <span id="alert"></span>
    </aside>
    <section id="main_content"></section>
</section>
<footer id="page_footer"></footer>

以下代码帮助我实现了这个结果

function scroll_to_element_if_not_inside_view(element){
  if($(window).scrollTop() > element.offset().top){
    $('html, body').animate( { scrollTop: element.offset().top }, {duration: 400 } );
  }
}

没有JQuery版本

这里的特殊情况是，滚动容器是
表的主体（
TBODY
，
table.body
）（滚动独立于
THEAD
）。但它可以适应任何情况，一些更简单的情况

const row = table.body.children[ ... ];
...

const bottomOfRow = row.offsetHeight + row.offsetTop ;
// if the bottom of the row is in the viewport...
if( bottomOfRow - table.body.scrollTop < table.body.clientHeight ){
    // ... if the top of the row is in the viewport
    if( row.offsetTop - table.body.scrollTop > 0 ){
        console.log( 'row is entirely visible' );
    }
    else if( row.offsetTop - table.body.scrollTop + row.offsetHeight > 0 ){
        console.log( 'row is partly visible at top')
        row.scrollIntoView();
    }
    else {
        console.log( 'top of row out of view above viewport')
        row.scrollIntoView();
    }
}
else if( row.offsetTop  - table.body.scrollTop < table.body.clientHeight ){
    console.log( 'row is partly visible at bottom')
    row.scrollIntoView();
}
else {
    console.log( 'row is out of view beneath viewport')
    row.scrollIntoView();
}

const row=table.body.children[…]；
...
常量bottomOfRow=row.offsetHeight+row.offsetTop；
//如果行的底部在视口中。。。
if（row的底部-table.body.scrollTop0）{
log（'行完全可见'）；
}
else if（row.offsetTop-table.body.scrollTop+row.offsetHeight>0）{
log（'行在顶部部分可见'）
row.scrollIntoView（）；
}
否则{
console.log（'视口上方视图中的行顶部'）
row.scrollIntoView（）；
}
}
else if（row.offsetTop-table.body.scrollTop
我认为这是完整的答案电梯必须能够上下移动；）

功能确保可修改（elementId，top=0/*设置为“top nav”高度（如果有）*/）{
设elem=$（'#elementId'）；
if（elem）{
让offset=elem.offset（）.top-$（window.scrollTop（）；
如果（偏移>窗内高度）{//不在视图中
$（'html，body'）.animate（{scrollTop:offset+top}，1000）；
}否则，如果（偏移量<顶部）{//应转到顶部
$（'html，body'）.animate（{scrollTop:$（window.scrollTop（）-（top-offset）}，1000）；
}
}
}
您的演示当前使用的是innerWidth而不是InnerHeights。实际上，它只能向下滚动。您还需要检查offset.top函数checkIfInView（元素）的ABS{var offset=element.offset（）.top-$（window.scrollTop（）；if（offset>window.innerHeight | | offset
双向滚动：（element.offset（）.top-$（window.scrollTop（））>window.innerHeight | | |（element.offset（）.top-$（window.scrollTop（））<0此功能仅在需要向上滚动时有效，而不在需要向下滚动时有效。
jQuery(document).ready(function() {

var viewportWidth = jQuery(window).width(),
    viewportHeight = jQuery(window).height(),

    documentScrollTop = jQuery(document).scrollTop(),
    documentScrollLeft = jQuery(document).scrollLeft(),

    $myElement = jQuery('#myElement'),

    verticalVisible, horizontalVisible,

    elementOffset = $myElement.offset(),
    elementHeight = $myElement.height(),
    elementWidth = $myElement.width(),

    minTop = documentScrollTop,
    maxTop = documentScrollTop + viewportHeight,
    minLeft = documentScrollLeft,
    maxLeft = documentScrollLeft + viewportWidth;

function scrollToPosition(position) {
    jQuery('html,body').animate({
        scrollTop : position.top,
        scrollLeft : position.left
    }, 300);
}

if (
    ((elementOffset.top > minTop && elementOffset.top < maxTop) ||
    (elementOffset.top + elementHeight > minTop && elementOffset.top + 
elementHeight < maxTop))
&&  ((elementOffset.left > minLeft && elementOffset.left < maxLeft) ||
    (elementOffset.left + elementWidth > minLeft && elementOffset.left +
elementWidth < maxLeft)))
{
    alert('some portion of the element is visible');

    if (elementOffset.top >= minTop && elementOffset.top + elementHeight 
<= maxTop) {
        verticalVisible = elementHeight;
    } else if (elementOffset.top < minTop) {
        verticalVisible = elementHeight - (minTop - elementOffset.top);
    } else {
        verticalVisible = maxTop - elementOffset.top;
    }

    if (elementOffset.left >= minLeft && elementOffset.left + elementWidth 
<= maxLeft) {
        horizontalVisible = elementWidth;
    } else if (elementOffset.left < minLeft) {
        horizontalVisible = elementWidth - (minLeft - elementOffset.left);
    } else {
        horizontalVisible = maxLeft - elementOffset.left;
    }

    var percentVerticalVisible = (verticalVisible / elementHeight) * 100;
    var percentHorizontalVisible = (horizontalVisible / elementWidth) * 100;

    if (percentVerticalVisible < 50 || percentHorizontalVisible < 50) {
        alert('less than 50% of element visible; scrolling');
        scrollToPosition(elementOffset);
    } else {
        alert('enough of the element is visible that there is no need to scroll');
    }

} else {
    // element is not visible; scroll to it
    alert('element is not visible; scrolling');
    scrollToPosition(elementOffset);
}

function scrollToView(element, parent) {
    element = $(element);
    parent = $(parent);

    var offset = element.offset().top + parent.scrollTop();

    var height = element.innerHeight();
    var offset_end = offset + height;
    if (!element.is(":visible")) {
        element.css({"visibility":"hidden"}).show();
        var offset = element.offset().top;
        element.css({"visibility":"", "display":""});
    }

    var visible_area_start = parent.scrollTop();
    var visible_area_end = visible_area_start + parent.innerHeight();

    if (offset-height < visible_area_start) {
        parent.animate({scrollTop: offset-height}, 600);
        return false;
    } else if (offset_end > visible_area_end) {
        parent.animate({scrollTop: parent.scrollTop()+ offset_end - visible_area_end }, 600);
        return false;

    }
    return true;
}

function scrollIntoViewIfOutOfView(el) {
    var topOfPage = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop;
    var heightOfPage = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;
    var elY = 0;
    var elH = 0;
    if (document.layers) { // NS4
        elY = el.y;
        elH = el.height;
    }
    else {
        for(var p=el; p&&p.tagName!='BODY'; p=p.offsetParent){
            elY += p.offsetTop;
        }
        elH = el.offsetHeight;
    }
    if ((topOfPage + heightOfPage) < (elY + elH)) {
        el.scrollIntoView(false);
    }
    else if (elY < topOfPage) {
        el.scrollIntoView(true);
    }
}

<section id="container">
    <aside id="sidebar">
        <p>
            Scroll up and down to alert the footer visibility by color:
        </p>
        <ul>
            <li><span class="blue">Blue</span> = footer <u>not visible</u>;</li>
            <li><span class="yellow">Yellow</span> = footer <u>visible</u>;</li>
        </ul>
        <span id="alert"></span>
    </aside>
    <section id="main_content"></section>
</section>
<footer id="page_footer"></footer>

<script type="text/javascript" src="js/jquery-1.12.0.min.js"></script>
<script type="text/javascript" src="js/jquery_visible/examples/js/jq.visible.js"></script>

<script type="text/javascript">
jQuery( document ).ready(function ( $ ) {
  if ($("footer#page_footer").visible(true, false, "both")) {
    $("#main_content").css({"background-color":"#ffeb3b"});
    $("span#alert").html("Footer visible");
  } else {
    $("#main_content").css({"background-color":"#4aafba"});
    $("span#alert").html("Footer not visible");
  }

  $(window).scroll(function() {
    if ($("footer#page_footer").visible(true, false, "both")) {
      $("#main_content").css({"background-color":"#ffeb3b"});
      $("span#alert").html("Footer visible");
    } else {
      $("#main_content").css({"background-color":"#4aafba"});
      $("span#alert").html("Footer not visible");
    }
  });
});
</script>

function scroll_to_element_if_not_inside_view(element){
  if($(window).scrollTop() > element.offset().top){
    $('html, body').animate( { scrollTop: element.offset().top }, {duration: 400 } );
  }
}

const row = table.body.children[ ... ];
...

const bottomOfRow = row.offsetHeight + row.offsetTop ;
// if the bottom of the row is in the viewport...
if( bottomOfRow - table.body.scrollTop < table.body.clientHeight ){
    // ... if the top of the row is in the viewport
    if( row.offsetTop - table.body.scrollTop > 0 ){
        console.log( 'row is entirely visible' );
    }
    else if( row.offsetTop - table.body.scrollTop + row.offsetHeight > 0 ){
        console.log( 'row is partly visible at top')
        row.scrollIntoView();
    }
    else {
        console.log( 'top of row out of view above viewport')
        row.scrollIntoView();
    }
}
else if( row.offsetTop  - table.body.scrollTop < table.body.clientHeight ){
    console.log( 'row is partly visible at bottom')
    row.scrollIntoView();
}
else {
    console.log( 'row is out of view beneath viewport')
    row.scrollIntoView();
}

function ensureVisible(elementId, top = 0 /* set to "top-nav" Height (if you have)*/) {
  let elem = $('#elementId');
  if (elem) {
    let offset = elem.offset().top - $(window).scrollTop();
    if (offset > window.innerHeight) { // Not in view
      $('html,body').animate({ scrollTop: offset + top }, 1000);
    } else if (offset < top) { // Should go to top
      $('html,body').animate({ scrollTop: $(window).scrollTop() - (top - offset) }, 1000);
    }
  }
}