用动画交换div位置

Question

How to swap div position when clicked only with the first div in stack . So when div 2 or 3 is clicked it will swap with the first child of parent in DOM and when the first child of parent in DOM is clicked nothing should happen.

This is my fiddle: http://jsfiddle.net/exc5m046/

HTML

<div id="container">
    <div id="one" class="move">div 1</div>
    <div id="two" class="move">div 2</div>
    <div id="three" class="move">div 3</div>
</div>

CSS

#container {
    width: 200px;
    color:#fff;
    position: relative;
    text-align:center;
}
#container div {
    position: relative;
    margin:10px;
    background:#ff00ab;
    padding:5px;
    border-radius:3px;
    text-align:center;
    display:inline-block;
}

jQuery

var animating = false;

$('#container').on('click', '.move', function () {

    var clickedDiv = $(this).closest('div'),

    prevDiv = clickedDiv.prev(),
    distance = clickedDiv.offset().left - prevDiv.offset().left;

    if (prevDiv.length) {
        animating = true;
        $.when(clickedDiv.animate({
           left: -distance
        }, 2000),
        prevDiv.animate({
            left: distance
        }, 2000)).done(function () {
            prevDiv.css('left', '0px');
            clickedDiv.css('left', '0px');
            clickedDiv.insertBefore(prevDiv);
            animating = false;
        });
    }
});

Answer 1

To swap the clicked div , you have to change the script. The prevDiv variable is selecting the previous sibiling the apply the switch, but you want to change it to:

prevDiv = $("#container > :first-child")

so it always selects the first child of the container.

Then, add the condition that the clicked element cannot be the first one:

if (!clickedDiv.is(":first-child")) {

Finally, to swap correctly, place the prevDiv at the place where the clicked div was, and set the clickedDiv to be the first child with prependTo('') :

prevDiv.insertBefore(clickedDiv);
clickedDiv.prependTo("#container");

And, , you're good to go: http://jsfiddle.net/exc5m046/3/

Answer 2

Edit, updated

Try

html

<!-- removed class `first` from element at index 0 -->
<div id="container">
    <div id="one" class="move">div 1</div>
    <div id="two" class="move">div 2</div>
    <div id="three" class="move">div 3</div>
</div>

js

var animating = false;

$('#container').on('click', '.move', function () {

    var clickedDiv = $(this).closest('div'),

        // adjusted `prevDiv` to `$(".move").eq(0)`
        prevDiv = $(".move").eq(0),
        distance = clickedDiv.offset().left - prevDiv.offset().left;

    if (/*!clickedDiv.is(".first") &&*/ prevDiv.length) {
        animating = true;
        $.when(clickedDiv.animate({
           left: -distance
        }, 2000),
        prevDiv.animate({
            left: distance
        }, 2000)).done(function () {
            prevDiv.css('left', '0px');
            clickedDiv.css('left', '0px');
            // changed `clickedDiv.insertBefore(prevDiv);` to 
            // `clickedDiv.prependTo("#container");`
            clickedDiv.prependTo("#container");
            animating = false;
        });
    }
});

http://jsfiddle.net/exc5m046/14/

See http://api.jquery.com/prependTo/

Answer 3

Try

$('#container div').on('click', '.move', function () {
  if ( $( this ).index() == 0 ) {
    return
  } else {
    //...code
  }
}

This triggers your code only, if the div is not the first element in the parent #container .