如何在这些元素上添加hide()和show()效果的转换

在下面的SSCCE中，如何使用show()设置.item的外观动画，并使用hide()设置其消失动画，使其看起来像是item5、item6、item7和item8飞入了视口？

也就是说，我想要的是，当第一次点击.next-arrow时，例如，隐藏item1、item2、item3、item4，以及显示item5、item6、item7、item8，都是"过渡"的——就像新页面流入这个网站的视口一样。

我该怎么做？

$(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.previous-arrow').click(function(event) {
    event.preventDefault();
    var currentFirstItem = getCurrentFirstItem();
    $('div.item' + (currentFirstItem - 1)).show();
    if (('div.item' + (currentFirstItem - 2)).length) {
      $('div.item' + (currentFirstItem - 2)).show();
    }
    if (('div.item' + (currentFirstItem - 3)).length) {
      $('div.item' + (currentFirstItem - 3)).show();
    }
    if (('div.item' + (currentFirstItem - 4)).length) {
      $('div.item' + (currentFirstItem - 4)).show();
    }
    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="">&gt;</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="">&lt;</a>	
</div>

如果你只想使用show（）和hide（），你可以使用show（'slow'）和hid（'slow`）等。除此之外，还有很多方法和效果可以使用。

请点击此链接了解有多少种方法可以做到这一点。

jQuery效果

您可以使用css转换或css动画。动画，如：

定义css类规则，并为要设置动画的元素指定类名

.doFadeIn {
    -webkit-animation:fadeInSlide forwards ease-in 150ms;
    animation:fadeInSlide forwards ease-in 150ms;
}
.doFadeOut {
    -webkit-animation:fadeOutSlideDown forwards ease-out 150ms;
    animation:fadeOutSlideDown forwards ease-out 150ms;
}

定义动画的关键帧

    @keyframes fadeInSlide
    {
         0% { opactity:0; transform: translateX(-100px); }
         100% { opactity:1; transform: translateX(0); }
    }

将doFadeIn指定给元素的类名时，它们将：淡入-不透明度：0到1（0%可见到100%可见）沿着元素原始位置左侧100px的水平轴（X）移动到其原始位置。

它将在150毫秒的持续时间内完成此操作

<div id="my-widget1" class="my-widget"><div>
  
<div id="my-widget1" class="my-widget doFadeIn"><div>

您可以为show()函数（如.show('slow')）传递一个参数，该参数将执行类似fadeIn()函数的动画。

查看文档中的示例

您可以使用.hide()、fadeOut()、show()、fadeIn()

示例代码

您可以使用.show()来显示匹配的元素

当用户在输入文本上键入内容时，示例代码显示一个列表。

    $("#search-guide").focusin(function () {
      $("#list-user-guides").show();
    });

您可以使用.hide()来隐藏匹配的元素

当用户单击屏幕上的其他位置时隐藏列表的示例代码。

    $("#search-guide").focusin(function () {
      $("#list-user-guides").hide();
    });

但我个人使用.fadeIn()和fadeOut()，因为这两种方法都带有平滑的动画。

您可以按照上述答案查看官方文档。

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