jquery ticker.js ニュースティッカーを作る

ニュースティッカーってどうやって作るの？

ニュースティッカーって？

ニュースティッカーとは、よくある文字列が出たり、消えたりする効果です。javascript、今回はjqueryでの作り方を書きます。

js

以下を jquery.ticker.js として保存。
そして使いたいHTMLで読み込みます。

function shuffleContent(container) {
    var content = container.find("> *");
    var total = content.size();
    content.each(function() {
        content.eq(Math.floor(Math.random()*total)).prependTo(container);
    });
}

$(function(){
    
    
    
    $(window).load(function(){
        
        shuffleContent($(".ticker > ul"));
        
        //alert($(".ticker > ul").html());
        
        var $setElm = $('.ticker');
        var effectSpeed = 1000;
        var switchDelay = 6000;
        var easing = 'swing';

        $setElm.each(function(){
            var effectFilter = $(this).attr('rel'); // 'fade' or 'roll' or 'slide'

            var $targetObj = $(this);
            var $targetUl = $targetObj.children('ul');
            var $targetLi = $targetObj.find('li');
            var $setList = $targetObj.find('li:first');

            var ulWidth = $targetUl.width();
            var listHeight = $targetLi.height();
            $targetObj.css({height:(listHeight)});
            $targetLi.css({top:'0',left:'0',position:'absolute'});

            if(effectFilter == 'fade') {
                $setList.css({display:'block',opacity:'0',zIndex:'98'}).stop().animate({opacity:'1'},effectSpeed,easing).addClass('showlist');
                setInterval(function(){
                    var $activeShow = $targetObj.find('.showlist');
                    $activeShow.animate({opacity:'0'},effectSpeed,easing,function(){
                        $(this).next().css({display:'block',opacity:'0',zIndex:'99'}).animate({opacity:'1'},effectSpeed,easing).addClass('showlist').end().appendTo($targetUl).css({display:'none',zIndex:'98'}).removeClass('showlist');
                    });
                },switchDelay);
            } else if(effectFilter == 'roll') {
                $setList.css({top:'3em',display:'block',opacity:'0',zIndex:'98'}).stop().animate({top:'0',opacity:'1'},effectSpeed,easing).addClass('showlist');
                setInterval(function(){
                    var $activeShow = $targetObj.find('.showlist');
                    $activeShow.animate({top:'-3em',opacity:'0'},effectSpeed,easing).next().css({top:'3em',display:'block',opacity:'0',zIndex:'99'}).animate({top:'0',opacity:'1'},effectSpeed,easing).addClass('showlist').end().appendTo($targetUl).css({zIndex:'98'}).removeClass('showlist');
                },switchDelay);
            } else if(effectFilter == 'slide') {
                $setList.css({left:(ulWidth),display:'block',opacity:'0',zIndex:'98'}).stop().animate({left:'0',opacity:'1'},effectSpeed,easing).addClass('showlist');
                setInterval(function(){
                    var $activeShow = $targetObj.find('.showlist');
                    $activeShow.animate({left:(-(ulWidth)),opacity:'0'},effectSpeed,easing).next().css({left:(ulWidth),display:'block',opacity:'0',zIndex:'99'}).animate({left:'0',opacity:'1'},effectSpeed,easing).addClass('showlist').end().appendTo($targetUl).css({zIndex:'98'}).removeClass('showlist');
                },switchDelay);
            }
        });
    });
});

htmlとcss

<style>
.ticker {
        position: relative;
        overflow: hidden;
    }
    
    .ticker ul {
        margin:0;
        padding:0;
        width: 100%;
        position: relative;
    }
    
    .ticker ul li {
        width: 100%;
        display: none;
    }
    
    


</style>


<div class="ticker" rel="fade">
    <ul>
        <li>hogera</li>
        <li>loveyou</li>
    </ul>
</div>

jqueryと上記二つを一緒に読み込めばハイセンスなニュースティッカーの完成。