在下面的 SSCCE 中，在点击 .next-arrow 和 .previous-arrow 时，我隐藏和显示了一些 .item 元素，一次四个(其中四个一次在屏幕上可见)。
我想为它们的显示和隐藏设置动画，以便在屏幕上创建看似条状的元素的滑动效果。那就是我想创建一个水平滑动效果。
我发现了很多选项，但我想使用 animate({"width":"toggle"}) 因为它是最简单的。它几乎也符合我的目的。
唯一的问题是在滑动过程中，新item的流入显示在下方所有item所在的水平空间 包含在内。 然后，一旦它们完全可见，并且前一组完全不可见，它们就会出现在正确的位置。
我需要它们在 .wrapper 包围的水平行/空间内显示，在出现的过程中也是如此。
那么为什么会发生这种情况，我应该如何解决这个问题？
$(document).ready(function() {
//alert('ready');//check
var numberOfItems = $('.item').length;
//alert('numberOfItems => ' + numberOfItems);//check
displayNextArrowOnCondition();
displayPreviousArrowOnCondition();
/**
*
**
$('a.next-arrow').click(function(event) {
event.preventDefault();
var currentFirstItem = getCurrentFirstItem(); // Difference between var and no var SO: If you're in the global scope then there's no difference. If you're in a function then var will create a local variable, "no var" will look up the scope chain until it finds the variable or hits the global scope (at which point it will create it):
$('div.item'+currentFirstItem).hide(); //We don't need to have the condition of checking this element's existence because the next-arrow whose handler this method is, appears only if the numberOfItems is greater than the id of the item with the greatest id among the elements currently visible on the screen.
if ( ('div.item'+(currentFirstItem+1)).length ) { //SO: How can I check the existence of an element in jQuery?? In JavaScript, everything is truthy or falsy and for numbers, 0 means false, everything else true. So you could write: "if ($(selector).length)" - and you don't need that > 0 part.
$('div.item'+(currentFirstItem+1)).hide();
}
if ( ('div.item'+(currentFirstItem+2)).length ) {
$('div.item'+(currentFirstItem+2)).hide();
}
if ( ('div.item'+(currentFirstItem+3)).length ) {
$('div.item'+(currentFirstItem+3)).hide();
}
hidePreviousArrow();
hideNextArrow();
displayPreviousArrowOnCondition();
displayNextArrowOnCondition();
}); */
/**
*
**/
$('a.next-arrow').click(function(event) {
event.preventDefault();
var currentFirstItem = getCurrentFirstItem(); // Difference between var and no var SO: If you're in the global scope then there's no difference. If you're in a function then var will create a local variable, "no var" will look up the scope chain until it finds the variable or hits the global scope (at which point it will create it):
$('div.item'+currentFirstItem).animate({"width": "toggle"}, 350); //We don't need to have the condition of checking this element's existence because the next-arrow whose handler this method is, appears only if the numberOfItems is greater than the id of the item with the greatest id among the elements currently visible on the screen.
if ( ('div.item'+(currentFirstItem+1)).length ) { //SO: How can I check the existence of an element in jQuery?? In JavaScript, everything is truthy or falsy and for numbers, 0 means false, everything else true. So you could write: "if ($(selector).length)" - and you don't need that > 0 part.
$('div.item'+(currentFirstItem+1)).animate({"width": "toggle"}, 350);
}
if ( ('div.item'+(currentFirstItem+2)).length ) {
$('div.item'+(currentFirstItem+2)).animate({"width": "toggle"}, 350);
}
if ( ('div.item'+(currentFirstItem+3)).length ) {
$('div.item'+(currentFirstItem+3)).animate({"width": "toggle"}, 350);
}
hidePreviousArrow();
hideNextArrow();
displayPreviousArrowOnCondition();
displayNextArrowOnCondition();
});
/**
*
**
$('a.previous-arrow').click(function(event) {
event.preventDefault();
var currentFirstItem = getCurrentFirstItem();
$('div.item'+(currentFirstItem-1)).show('slow');
if ( ('div.item'+(currentFirstItem-2)).length ) {
$('div.item'+(currentFirstItem-2)).show('slow');
}
if ( ('div.item'+(currentFirstItem-3)).length ) {
$('div.item'+(currentFirstItem-3)).show('slow');
}
if ( ('div.item'+(currentFirstItem-4)).length ) {
$('div.item'+(currentFirstItem-4)).show('slow');
}
hidePreviousArrow();
hideNextArrow();
displayPreviousArrowOnCondition();
displayNextArrowOnCondition();
});*/
/**
*
**/
$('a.previous-arrow').click(function(event) {
event.preventDefault();
var currentFirstItem = getCurrentFirstItem();
$('div.item'+(currentFirstItem-1)).animate({"width": "toggle"}, 350);
if ( ('div.item'+(currentFirstItem-2)).length ) {
$('div.item'+(currentFirstItem-2)).animate({"width": "toggle"}, 350);
}
if ( ('div.item'+(currentFirstItem-3)).length ) {
$('div.item'+(currentFirstItem-3)).animate({"width": "toggle"}, 350);
}
if ( ('div.item'+(currentFirstItem-4)).length ) {
$('div.item'+(currentFirstItem-4)).animate({"width": "toggle"}, 350);
}
hidePreviousArrow();
hideNextArrow();
displayPreviousArrowOnCondition();
displayNextArrowOnCondition();
});
/**
* DISPLAY NEXT ARROW WHEN
* 1. NUMBER OF ITEMS IS GREATER THAN THE id OF THE LAST ITEM DISPLAYED IN THE CURRENT VIEWPORT
**/
function displayNextArrowOnCondition() {
//alert('displayNextArrowOnCondition called');//check
//Iterate through items in OPPOSTIE order, and when found the first one which is not hidden by hide() or display:none, assign it to currentLastItem (because this is the first item in the viewport), and break out from the loop.
var currentLastItem = getCurrentLastItem();
//alert('currentLastItem -> ' + currentLastItem);//check
if (currentLastItem < numberOfItems) {
$('a.next-arrow').css('display', 'block');
$('.wrapper').mouseover(function() {
//$('a.next-arrow').css('visibility', 'visible');
});
$('.wrapper').mouseleave(function() {
//$('a.next-arrow').css('visibility', 'hidden');
});
}
}
/**
* DISPLAY PREVIOUS ARROW WHEN
* 1. THE id OF THE FIRST DISPLAYED ITEM IS GREATER THAN 4
**/
function displayPreviousArrowOnCondition() {
//Iterate through items in order, and when found the first one which is not hidden by hide() or display:none, assign it to currentFirstItem (because this is the first item in the viewport), and break out from the loop.
var currentFirstItem = getCurrentFirstItem();
if ( currentFirstItem > 4 ) {
$('a.previous-arrow').css('display', 'block');
$('.wrapper').mouseover(function() {
$('a.previous-arrow').css('visibility', 'visible');
});
$('.wrapper').mouseleave(function() {
$('a.previous-arrow').css('visibility', 'hidden');
});
}
}
/**
* DISPLAY:NONE NEXT ARROW IF IT IS VISIBLE
**/
function hideNextArrow() {
//alert('hideNextArrow called');//check
if ($('a.next-arrow').css('display').toLowerCase() == 'block') { //The == operator will compare for equality after doing any necessary type conversions. The === operator will not do the conversion, so if two values are not the same type === will simply return false.| Just in case anyone was wondering in 2012: === is way faster than ==. jsperf.com/comparison-of-comparisons.
//alert('YES if ($(\'a.next-arrow\').attr(\'display\').toLowerCase() == \'block\'). SO I AM CHANGING IT TO none.');//check
$('a.next-arrow').css('display', 'none');
} //else { alert('NO if ($(\'a.next-arrow\').attr(\'display\').toLowerCase() == \'block\').'); } //check
}
/**
* DISPLAY:NONE PREVIOUS ARROW IF IT IS VISIBLE
**/
function hidePreviousArrow() {
//alert('hidePreviousArrow called');//check
//alert($('a.previous-arrow').css('display'));//check
if ($('a.previous-arrow').css('display') == 'block') {
//alert('YES if ($(\'a.previous-arrow\').attr(\'display\').toLowerCase() == \'block\'). SO I AM CHANGING IT TO none.');//check
$('a.previous-arrow').css('display', 'none');
} //else { alert('NO if ($(\'a.previous-arrow\').attr(\'display\').toLowerCase() == \'block\').'); } //check
}
/**
*
**/
function getCurrentFirstItem() {
for (i=1; i<=numberOfItems; i++) {
if ( $("#"+i).visible(true, true) ) {
//alert('YES if ( $("#"+i).visible(true, true) )');//check
currentFirstItem = i;
break;
} //else { //alert('NO if ( $("#"+i).visible(true, true) )'); }//check
}
//alert('currentFirstItem -> ' + currentFirstItem);//check
return currentFirstItem;
}
/**
*
**/
function getCurrentLastItem() {
for (j=numberOfItems; j>=1; j--) {
if ( $("#"+j).visible(true, true) ) {
//alert("YES if ( $(\"#\"+j).visible(true, true) ) ");//check
currentLastItem = j;
break;
} //else { //alert('NO if ( $("#"+j).visible(true, true) )'); } //check
}
//alert('currentLastItem -> ' + currentLastItem);//check
return currentLastItem;
}
});html, body, body div, span, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, abbr, address, cite, code, del, dfn, em, img, ins, kbd, q, samp, small, strong, sub, sup, var, b, i, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, figure, footer, header, hgroup, menu, nav, section, time, mark, audio, video, details, summary {
margin: 0px;
padding: 0px;
border: 0px none;
background: transparent none repeat scroll 0% 0%;
font-size: 100%;
vertical-align: baseline;
}
.wrapper {
position:relative;
white-space:nowrap;
overflow:hidden;
}
div.item {
/*position:absolute;*/
display:inline-block;
width:25%;
height:25vw;
}
.item1 {
left:0%;
background-color:wheat;
}.item2 {
left:25%;
background-color:pink;
}.item3 {
left:50%;
background-color:beige;
}.item4 {
left:75%;
background-color:gainsboro;
}.item5 {
left:100%;
background-color:coral;
}.item6 {
left:125%;
background-color:crimson;
} .item7 {
left:150%;
background-color:aquamarine;
} .item8 {
left:175%;
background-color:darkgoldenrod;
}.item9 {
left:200%;
background-color:khaki;
}.item10 {
left:225%;
background-color:indianred;
}.item11 {
left:250%;
background-color:mediumspringgreen;
}
.previous-arrow, .next-arrow {
width:30px;
height:50%;
top:50%;
position:absolute;
opacity:0.7;
color:white;
background-repeat:no-repeat;
margin-top: -30px;
display:none;
}
.previous-arrow {
background-image:url(a2.png);
left:0px;
}
.next-arrow {
background-image:url(b2.png);
right:0px;
}
.previous-arrow, .next-arrow {
opacity:1;
}
body {
background-color:black;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://cdn.jsdelivr.net/jquery.visible/1.1.0/jquery.visible.min.js"></script>
<div class="wrapper"><!--
--><a class="previous-arrow" href=""><</a>--><!--
--><div id="1" class="item item1 wheat">a.</div><!--
--><div id="2" class="item item2 pink">a.</div><!--
--><div id="3" class="item item3 beige">a.</div><!--
--><div id="4" class="item item4 gainsboro">a.</div><!--
--><div id="5" class="item item5 coral">a.</div><!--
--><div id="6" class="item item6 crimson">a.</div><!--
--><div id="7" class="item item7 darkgoldenrod">a.</div><!--
--><div id="8" class="item item8 aquamarine">a.</div><!--
--><div id="9" class="item item9 aquamarine">a.</div><!--
--><div id="10" class="item item10 aquamarine">a.</div><!--
--><div id="11" class="item item11 aquamarine">a.</div><!--
--><a class="next-arrow" href=""><</a>
</div>最佳答案
动画添加了 overflow: hidden ，当与 vertical-align: baseline 结合使用时，它似乎会影响垂直对齐。添加溢出:隐藏到所有元素修复它:
div.item {
overflow: hidden;
}
或者，如果您不想在所有元素上 overflow hidden ，您可以将垂直对齐设置为基线以外的其他内容:
div.item {
vertical-align: top;
}
关于javascript - Div 出现在其正常位置 "during the time they are displaying"下方并具有动画效果？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33437406/