只有一个跨度有效

时间:2012-05-25 16:09:04

标签: javascript jquery

此代码提供点效果,如加载栏(“正在加载..,正在加载...,正在加载...”),但问题是,只有一个单独的跨度ID可用,第二个不会,我不知道为什么... 请帮帮我们

<SCRIPT LANGUAGE="JavaScript" TYPE="text/javascript">
<!--
function showProgressDots(numberOfDots) {

    var progress = document.getElementById('progressDots');

    switch(numberOfDots) {
        case 1:
            progress.innerHTML = '.';
            timerHandle = setTimeout('showProgressDots(2)',200);
            break;
        case 2:
            progress.innerHTML = '..';
            timerHandle = setTimeout('showProgressDots(3)',200);
            break;
        case 3:
            progress.innerHTML = '...';
            timerHandle = setTimeout('showProgressDots(1)',200);
            break;
    }
}
window.setTimeout('showProgressDots(1)',100);
//-->
</SCRIPT>

Loading<span id="progressDots" style="position:absolute;"></span>
SecondLoading<span id="progressDots" style="position:absolute;"></span>

4 个答案:

答案 0 :(得分:6)

如果需要,这是一个简短的解决方案。

HTML:

Loading<span id="progressDots1"></span>
SecondLoading<span id="progressDots2"></span>

JavaScript的:

function loading(id) {
    var el = document.getElementById(id),
        i = 0,
        dots = "...";

    setInterval(function() {
        el.innerHTML = dots.substring(0, ++i);
        if (i % 3 == 0) i = 0;
    }, 500);
}

loading("progressDots1");
loading("progressDots2");​

DEMO: http://jsfiddle.net/dzFL3/

答案 1 :(得分:3)

编辑1:写了一个可自定义的加载器,以便注册/取消注册加载器..见下文,

编辑2:正如Vision所指出的那样

  

只是出于兴趣......我想,创建多个计时器并将它们存储在数组中有什么意义?如果等待一段时间,单独的计时器将失去同步。怎么样:jsfiddle.net/rMpK9/5

改进代码(来自Vision的DEMO并使用getElementsByTagName

var timer = null,
    dotLimit = 3,
    elements = [];

function registerProgressDots(progress) {
    for (var i = 0; i < progress.length; i++) {
        elements.push(progress[i]);
    }

    timer = setInterval(function() {
        for (var i = 0; i < elements.length; i++) {
            with(elements[i]) {
                innerHTML = innerHTML.length == dotLimit ? '' : innerHTML + '.';
            }
        }
    }, 200);
}

function unRegisterProgressDots(index, clearDots) {
    if (typeof index == 'undefined' || index == null) {
        clearInterval(timer);
    } else {
        elements.splice(index, 1);
        if (elements.length == 0) {
            clearInterval(timer);
        }
    }

    if (clearDots) {
        var progress = document.getElementsByClassName('progressDots');
        for (var i = 0; i < progress.length; i++) {
            progress[i].innerHTML = '';
        }
    }
}

window.setTimeout(function() {
    var spanTags = document.getElementsByTagName('span');

    var progress = [];
    for (var i = 0; i < spanTags.length; i++) {
        if (spanTags[i].className.indexOf('progressDots') >= 0) {
            progress.push(spanTags[i]);
        }
    }

    registerProgressDots(progress);
}, 100);

window.setTimeout(function() {
    unRegisterProgressDots(null, true);
}, 10000); //stop loading text after 10 seconds

Final DEMO

答案 2 :(得分:1)

这是我的建议:

Loading<span id="progressDots" style="position:absolute;"></span> //element before script

<script type="text/javascript">
var i='', dots=20;

showProgressDots();    
function showProgressDots() {
    var progress = document.getElementById('progressDots');
        progress.innerHTML = i;
    i+='.';
    if (i.length<dots) setTimeout(showProgressDots, 200);
}
</script>

FIDDLE

答案 3 :(得分:1)

只需发布一个我为此制作的小插件(为了它的乐趣.. )。

(function($){
    $.fn['progress'] = function(_options){
        var options = {
            symbol: '.',
            delay: 200,
            length: 3,
            duration: 0
        };
        if (typeof _options === 'object'){
            $.extend(options, _options);
        } else if (_options === 'clear'){
            return this.each(function(){
                clear.apply(this);
            });
        }

        function display(){
            var self = $(this),
                txt = self.text() + options.symbol;
            if (txt.length  > options.length){
                txt = '';
            }
            self.text( txt );
        }

        function clear(){
            var self = $(this),
                timer = self.data('progressTimer');

            clearInterval(timer);
            self.text('');
            self.removeData('progressTimer');
        }

        return this.each(function(){
            var self = $(this),
                that = this,
                timer = null;

            timer = setInterval(function(){
                display.apply(that);
            }, options.delay);

            self.data('progressTimer', timer);

            if (options.duration){
                setTimeout(function(){
                        clear.apply(that);
                    }, options.duration);
            }
        });
    }

})(jQuery);

您将其与

一起使用
// to set it
$('some-selector').progress({/*options*/});

// to stop it
$('some-selector').progress('clear');

可用 options

  • symbol要在每次迭代时添加的字符(默认为.
  • length重新开始之前显示的最大符号数(默认为3
  • delay添加每个额外符号所需的时间(以毫秒为单位)(默认值为200
  • 清除插件之前
  • duration总持续时间(以毫秒为单位)(默认值为0,表示没有自动清除

example points to jsfiddle

$('some-selector').progress({
  symbol: '*',
  length: 10,
  delay: 100,
  duration: 5000 
});

更新评论

要在某个特定时间后自动清除它,只需在代码中添加超时..

所以

var progressElements = $('some-selector').progress({/*options*/}); // set the progress
setTimeout(function(){
   progressElements.progress('clear');
 }, 1000); // 1000ms = 1 second

更新第二条评论

更改了上面的插件代码以允许duration参数。

如果指定,则声明插件将自动清除的时间..

演示 http://jsfiddle.net/gaby/gh5CD/3/第二个加载器将在2秒后清除