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Editorial Team
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Asked: 2026-06-13T11:41:52+00:00

In my pursuit to learn javascript I am making the same slider, but with

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In my pursuit to learn javascript I am making the same slider, but with the animation on javascript (using css it is not an issue for me – it was made on the site google), as the one below:

Original Google slider (animation with css):
http://www.google.com/about/datacenters/inside/

My work so far:

http://jsfiddle.net/TS7Xu/3/

<!-- language-all: lang-html -->
<!DOCTYPE HTML>
<html lang="en-US">
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
    #promo{
    display:block;
    height: 354px;
    width: 790px;
    }
    .promo-item {
        width: 81px;
        height: 354px;
        float: left;
    }
    .promo-item.wide {
        width: 613px;
    }
    .threeP {
        background-color: rgb(206, 203, 203);
    }
    .oneP {
        background-color: rgb(241, 220, 182);
    }
    .twoP {
        background-color: rgb(187, 217, 226);
    }
</style>
</head>
<body>
<div id="promo">
    <div class="promo-item twoP wide" id="twoP">
      <div>
      </div>
    </div>
    <div class="promo-item threeP" id="threeP">
      <div>
      </div>
    </div>
    <div class="promo-item oneP" id="oneP">
      <div>
      </div>
    </div>
</div>


<script type="text/javascript">
var oneP = document.getElementById('oneP');
var twoP = document.getElementById('twoP');
var threeP = document.getElementById('threeP');
step = 1;
            function expandPanel1(){
                var h = oneP.clientWidth + step;
                oneP.style.width = h+"px";
                if (h < 614 || h !=614) {
                    setTimeout("expandPanel1()", 5);
                } else { oneP.style.width = 613+"px"; }
            }               
            function expandPanel2(){
                var h = twoP.clientWidth + step;
                twoP.style.width = h+"px";
                if (h < 614 || h !=614) {
                    setTimeout("expandPanel2()", 5)
                } else { twoP.style.width = 613+"px"; }
            }               
            function expandPanel3(){
                var h = threeP.clientWidth + step;
                threeP.style.width = h+"px";
                if (h < 614 || h !=614) {
                    setTimeout("expandPanel3()", 5)
                } else { threeP.style.width = 613+"px"; }
            }   
            //---------------------------------------------
                function expandPanel1Minus(){
                    var h = oneP.clientWidth - step;
                    oneP.style.width = h+"px";
                    if (h > 80 || h !=80) {
                        setTimeout("expandPanel1Minus()", 5)
                    } else { oneP.style.width = 81+"px"; }
                }               
                function expandPanel2Minus(){
                    var h = twoP.clientWidth - step;
                    twoP.style.width = h+"px";
                    if (h > 80 || h !=80) {
                        setTimeout("expandPanel2Minus()", 5)
                    } else { twoP.style.width = 81+"px"; }
                }               
                function expandPanel3Minus(){
                    var h = threeP.clientWidth - step;
                    threeP.style.width = h+"px";
                    if (h > 80 || h !=80) {
                        setTimeout("expandPanel3Minus()", 5)
                    } else { threeP.style.width = 81+"px"; }
                }
            //---------------------------------------------
    oneP.onmouseover = function () {
        expandPanel1()
            expandPanel3Minus()
            expandPanel2Minus()
    } 
    twoP.onmouseover = function () {
        expandPanel2()
            expandPanel3Minus()
            expandPanel1Minus()
    } 
    threeP.onmouseover = function () {
        expandPanel3()
            expandPanel2Minus()
            expandPanel1Minus()
    }
</script>

I know this example has errors because if a long drive with the mouse on the slider, it begins to “violently” run 🙂 I deliberately lowered animation speed.

Can someone give me some guidance on how to implement this correctly?

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1 Answer

  1. Editorial Team

    Here’s a pure JS implementation – JSFiddle link. In case the fiddle didn’t get saved, here’s the JS bit only. The rest of the HTML is same as the OP. the function go is called on body load.

    var f, s, t;
var which;

function go() {
    f = document.getElementById('oneP');
    s = document.getElementById('twoP');
    t = document.getElementById('threeP');

    which = s;

    f.onmouseover = function() {
        foo(this)
    };

    s.onmouseover = function() {
        foo(this)
    };

    t.onmouseover = function() {
        foo(this)
    };
}

function foo(e) {
    if (e.clientWidth < 613) {
        e.style.width = (e.clientWidth) + 10 + "px";
        which.style.width = (which.clientWidth - 10) + "px";

        setTimeout(function() {
            foo(e);
        }, 5);
    }
    else if (e.clientWidth > 613) {
        e.style.width = "613px";
        which.style.width = "81px";

        which = e;
    }
}​

    There is a bit of work left I think, the animation is not fast enough so it is possible to mouse over on another section while the animation is running. I leave that bit to you 🙂

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