有很多很多图片网站。 但是,用户只需要立即收到前15张图像。
document.addEventListener("DOMContentLoaded", function()
{
\t function loaded_3()
\t {
\t document.getElementById("left").innerHTML += "<br><br><strong>ALL DONE :)</strong><br><br>";
\t }
\t function loaded_2()
\t {
\t document.getElementById("left").innerHTML += "<br><br><strong>OK - images 16-30 have also loaded successfully!</strong><br>NOW LOADING THE REMAINING 5 IMAGES!<br>";
\t var last_divs = Array.prototype.slice.call(document.querySelectorAll('[data-last-id]'));
\t \t last_divs.forEach(function(element)
\t \t {
\t \t element.setAttribute('id', element.getAttribute('data-last-id'));
\t \t document.getElementById("left").innerHTML += 'id="' + element.getAttribute('data-last-id') + '" was set successfully!<br>';
\t \t });
\t window.removeEventListener("load", loaded_2);
\t window.addEventListener("load", loaded_3);
\t }
\t function loaded_1()
\t {
\t document.getElementById("left").innerHTML += "<strong>OK - images 1-15 have loaded successfully!</strong><br><br>";
\t var divs = Array.prototype.slice.call(document.querySelectorAll('[data-id]'));
\t \t divs.forEach(function(element)
\t \t {
\t \t element.setAttribute('id', element.getAttribute('data-id'));
\t \t document.getElementById("left").innerHTML += 'id="' + element.getAttribute('data-id') + '" was set successfully!<br>';
\t \t });
\t window.removeEventListener("load", loaded_1);
\t window.addEventListener("load", loaded_2);
\t }
\t window.addEventListener("load", loaded_1);
});
*
{
padding:0px;
margin:0px;
border-style:none;
box-sizing:border-box;
}
html, body
{
width:100%;
height:100%;
}
#left
{
position:absolute;
width:400px;
left:0px;
top:0px;
bottom:0px;
background-color:#ffcc00;
padding:20px;
}
#right
{
position:absolute;
left:400px;
top:0px;
right:0px;
bottom:0px;
background-color:#eeeeee;
padding:20px;
}
#one { background-image:url(https://placehold.it/999x999/ffcc00/cc33ff); }
#two { background-image:url(https://placehold.it/999x999/ff0000/000000); }
#three { background-image:url(https://placehold.it/999x999/00cc00/33cccc); }
#four { background-image:url(https://placehold.it/999x999/330033/ff33ff); }
#five { background-image:url(https://placehold.it/999x999/ffcccc/0033ff); }
#six { background-image:url(https://placehold.it/999x999/bbcc11/dddd00); }
#seven { background-image:url(https://placehold.it/999x999/0033bb/222bbb); }
#eight { background-image:url(https://placehold.it/999x999/2211bb/00bb11); }
#nine { background-image:url(https://placehold.it/999x999/ffcc00/22ccff); }
#ten { background-image:url(https://placehold.it/999x999/ffcc00/33ccff); }
#eleven { background-image:url(https://placehold.it/999x999/f0cc00/333333); }
#twelve { background-image:url(https://placehold.it/999x999/f1c20b/c13bf2); }
#thirteen { background-image:url(https://placehold.it/999x999/f0cd00/cf33f0); }
#fourteen { background-image:url(https://placehold.it/999x999/ff0b01/0001ff); }
#fifteen { background-image:url(https://placehold.it/999x999/ffbb00/dd31ff); }
#sixteen { background-image:url(https://placehold.it/999x999/ffd100/cc33ff); }
#seventeen { background-image:url(https://placehold.it/999x999/ffec10/000000); }
#eighteen { background-image:url(https://placehold.it/999x999/fbccfd/ff33ff); }
#nineteen { background-image:url(https://placehold.it/999x999/ccccff/cf33f0); }
#twenty { background-image:url(https://placehold.it/999x999/00ccee/cc33ff); }
#twentyone { background-image:url(https://placehold.it/999x999/ddccee/dddd00); }
#twentytwo { background-image:url(https://placehold.it/999x999/bbee00/cc33ff); }
#twentythree { background-image:url(https://placehold.it/999x999/11c000/c13bf2); }
#twentyfour { background-image:url(https://placehold.it/999x999/44c200/00bb11); }
#twentyfive { background-image:url(https://placehold.it/999x999/22ca00/33cccc); }
#twentysix { background-image:url(https://placehold.it/999x999/bbcf00/cc33ff); }
#twentyseven { background-image:url(https://placehold.it/999x999/ffbb00/00bb11); }
#twentyeight { background-image:url(https://placehold.it/999x999/eedd00/cc33ff); }
#twentynine { background-image:url(https://placehold.it/999x999/00ff00/33ccff); }
#thirty { background-image:url(https://placehold.it/999x999/220000/c13bf2); }
.testdiv
{
width:30px;
height:30px;
overflow:hidden;
margin:5px;
display:inline-block;
font-weight:bold;
font-size:30px;
color:#ffffff;
text-align:center;
line-height:30px;
}
<div id="left"></div>
<div id="right">
<div class="testdiv" id="one">1</div>
<div class="testdiv" id="two">2</div>
<div class="testdiv" id="three">3</div>
<div class="testdiv" id="four">4</div>
<div class="testdiv" id="five">5</div>
<div class="testdiv" id="six">6</div>
<div class="testdiv" id="seven">7</div>
<div class="testdiv" id="eight">8</div>
<div class="testdiv" id="nine">9</div>
<div class="testdiv" id="ten">10</div>
<div class="testdiv" id="eleven">11</div>
<div class="testdiv" id="twelve">12</div>
<div class="testdiv" id="thirteen">13</div>
<div class="testdiv" id="fourteen">14</div>
<div class="testdiv" id="fifteen">15</div>
<div class="testdiv" data-id="sixteen">16</div>
<div class="testdiv" data-id="seventeen">17</div>
<div class="testdiv" data-id="eighteen">18</div>
<div class="testdiv" data-id="nineteen">19</div>
<div class="testdiv" data-id="twenty">20</div>
<div class="testdiv" data-id="twentyone">21</div>
<div class="testdiv" data-id="twentytwo">22</div>
<div class="testdiv" data-id="twentythree">23</div>
<div class="testdiv" data-id="twentyfour">24</div>
<div class="testdiv" data-id="twentyfive">25</div>
<div class="testdiv" data-last-id="twentysix">26</div>
<div class="testdiv" data-last-id="twentyseven">27</div>
<div class="testdiv" data-last-id="twentyeight">28</div>
<div class="testdiv" data-last-id="twentynine">29</div>
<div class="testdiv" data-last-id="thirty">30</div>
</div> <!-- right -->
下一个10个图像应尽快作为第一图像15装入装载。 最后5张图片应该在第一张15张和下一张10张图片完成加载后加载。
这里是我的尝试: https://filebin.net/01s7w1grpybvkiis/fourth.html
我的方法是设置一个id =“”只是,让CSS做媒体的查询。 当然,我可以使用JS加载图像(然后我可以很容易地找出哪些已加载),但我需要照顾两者,CSS宽度和也像素比!
所以我不能加载JS中的特定图像,因为要加载的背景图像将是不同的,这取决于CSS宽度和像素比率(未在我的测试案例中实现,但您需要具有此信息!)。
这就是为什么我与JS和CSS尝试了一起(参见例如:https://filebin.net/01s7w1grpybvkiis/fourth.html)
我发现了一个库JS(名为enquire.js),它说,它可以做媒体查询纯JS,但未能使用媒体查询的像素比,所以我再次尝试CSS媒体查询。
我该如何为此编写纯JavaScript解决方案?我不喜欢在这个阶段使用jQuery。
嗨,你能不能请在这里编辑你的代码的相关位进入正题?即使任何链接的外部资源出现故障,堆栈溢出的问题预计也会有效。 –
你也可以澄清你想达到什么 - 这个'下一个10张图片应该在第一个15张图片加载后立即加载'听起来像是在将一张图片一个接一个地列出时的默认行为,不是? –
@皮卡웃我看了一下,代码非常广泛,所以我没有在这里复制它。 Ronny,尝试在编辑器中使用'<>'按钮在这里创建一个[mcve] – mplungjan