How do you swap DIVs on mouseover (jQuery)?

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天涯浪人

This most be the second most simple rollover effect, still I don\'t find any simple solution.

Wanted: I have a list of items and a corresponding lis

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5条回答

一生所求

2020-12-03 14:25

Rather than displaying all slides when JS is off (which would likely break the page layout) I would place inside the switch LIs real A links to server-side code which returns the page with the "active" class pre-set on the proper switch/slide.

$(document).ready(function() {
  switches = $('#switches > li');
  slides = $('#slides > div');
  switches.each(function(idx) {
    $(this).data('slide', slides.eq(idx));
  }).hover(
    function() {
      switches.removeClass('active');
      slides.removeClass('active');
      $(this).addClass('active');
      $(this).data('slide').addClass('active');
    });
});

#switches .active {
  font-weight: bold;
}
#slides div {
  display: none;
}
#slides div.active {
  display: block;
}

<html>

<head>

  <title>test</title>

  <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
  <script type="text/javascript" src="switch.js"></script>

</head>

<body>

  <ul id="switches">
    <li class="active">First slide</li>
    <li>Second slide</li>
    <li>Third slide</li>
    <li>Fourth slide</li>
  </ul>
  <div id="slides">
    <div class="active">Well well.</div>
    <div>Oh no!</div>
    <div>You again?</div>
    <div>I'm gone!</div>
  </div>

</body>

</html>

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清歌不尽

2020-12-03 14:29

Here's my light-markup jQuery version:

<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
function switchTo(i) {
  $('#switches li').css('font-weight','normal').eq(i).css('font-weight','bold');
  $('#slides div').css('display','none').eq(i).css('display','block');
}
$(document).ready(function(){
  $('#switches li').mouseover(function(event){
    switchTo($('#switches li').index(event.target));
  });
  switchTo(0);
});
</script>
<ul id="switches">
  <li>First slide</li>
  <li>Second slide</li>
  <li>Third slide</li>
  <li>Fourth slide</li>
</ul>
<div id="slides">
  <div>Well well.</div>
  <div>Oh no!</div>
  <div>You again?</div>
  <div>I'm gone!</div>
</div>

This has the advantage of showing all the slides if the user has javascript turned off, uses very little HTML markup and the javascript is pretty readable. The switchTo function takes an index number of which <li> / <div> pair to activate, resets all the relevant elements to their default styles (non-bold for list items, display:none for the DIVs) and the sets the desired list-item and div to bold and display. As long as the client has javascript enabled, the functionality will be exactly the same as your original example.

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野性不改

2020-12-03 14:31

Here's the jQuery version:

<script type="text/javascript" src="http://jqueryjs.googlecode.com/files/jquery-1.2.6.min.js"></script>
<script type="text/javascript">
$(function () {
    $("#switches li").mouseover(function () {
        var $this = $(this);
        $("#slides div").hide();
        $("#slide" + $this.attr("id").replace(/switch/, "")).show();
        $("#switches li").css("font-weight", "normal");
        $this.css("font-weight", "bold");
    });
});
</script>

<ul id="switches">
  <li id="switch1" style="font-weight:bold;">First slide</li>
  <li id="switch2">Second slide</li>
  <li id="switch3">Third slide</li>
  <li id="switch4">Fourth slide</li>
</ul>
<div id="slides">
  <div id="slide1">Well well.</div>
  <div id="slide2" style="display:none;">Oh no!</div>
  <div id="slide3" style="display:none;">You again?</div>
  <div id="slide4" style="display:none;">I'm gone!</div>
</div>

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刺人心

2020-12-03 14:35

The only thing that's wrong with this code (at least to me) is that you're not using a loop to process all elements. Other than that, why not to it like that?

And with loop, I mean grabbing the container element via a JQuery and iterating over all child elements – basically a one-liner.

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温柔的废话

2020-12-03 14:43

<html>
<head>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">

$(document).ready(
  function(){
    $( '#switches li' ).mouseover(
      function(){
        $( "#slides div" ).hide();
        $( '#switches li' ).css( 'font-weight', 'normal' );
        $( this ).css( 'font-weight', 'bold' );
        $( '#slide' + $( this ).attr( 'id' ).replace( 'switch', '' ) ).show();
      }
    );
  }
);

</script>
</head>
<body>
<ul id="switches">
  <li id="switch1" style="font-weight:bold;">First slide</li>
  <li id="switch2">Second slide</li>
  <li id="switch3">Third slide</li>
  <li id="switch4">Fourth slide</li>
</ul>
<div id="slides">
  <div id="slide1">Well well.</div>
  <div id="slide2" style="display:none;">Oh no!</div>
  <div id="slide3" style="display:none;">You again?</div>
  <div id="slide4" style="display:none;">I'm gone!</div>
</div>
</body>
</html>

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