javascript - Skycons，不能两次显示相同的图标吗？

Question

我已经将 JavaScript 插件“Skycons”连接到雅虎天气 RSS 提要。我遇到的问题是多天可能会有相同的天气预报，并且因为插件从 ID 而不是类中提取图标，所以我无法再次提取相同的图标。

例如，除了最后一个 li 实例之外，下面的所有图标都会显示 - 因为我重复了 id 雪:

<ul class="days">
       <li class="col-md-3 col-sm-3 col-xs-3"><strong>Saturday</strong>
             <canvas id="snow" width="50" height="50"></canvas>
             <span>19&deg;</span>
       </li>
       <li class="col-md-3 col-sm-3 col-xs-3"><strong>Sunday</strong>
             <canvas id="rain" width="50" height="50"></canvas>
             <span>19&deg;</span>
       </li>
       <li class="col-md-3 col-sm-3 col-xs-3"><strong>Monday</strong>
             <canvas id="sleet" width="50" height="50"></canvas>
             <span>19&deg;</span>
       </li>
       <li class="col-md-3 col-sm-3 col-xs-3"><strong>Wednesday</strong>
             <canvas id="snow" width="50" height="50"></canvas>
             <span>19&deg;</span>
       </li>
</ul>

这是我的初始化 JS:

<!--SkyCons-->  
<script type="text/javascript" src="js/vendors/skycons/skycons.js"></script> 
<script>
      var icons = new Skycons({"color": "#fff"}),
          list  = [
            "clear-day", "clear-night", "partly-cloudy-day",
            "partly-cloudy-night", "cloudy", "rain", "sleet", "snow", "wind",
            "fog"
          ],
          i;

      for(i = list.length; i--; )
        icons.set(list[i], list[i]);

      icons.play();
    </script> 

这里是引用的 JS 文件的链接:

https://github.com/darkskyapp/skycons/blob/master/skycons.js

Answer 1

您应该使用适用于元素引用的版本，而不是 id

(并更改 html 以使用类而不是 id)

for(i = list.length; i--; ) {
    var weatherType = list[i],
        elements = document.getElementsByClassName( weatherType );
    for (e = elements.length; e--;){
        icons.set( elements[e], weatherType );
    }
}

并将您的 html 更改为

   <li class="col-md-3 col-sm-3 col-xs-3"><strong>Saturday</strong>
         <canvas class="snow" width="50" height="50"></canvas>
         <span>19&deg;</span>
   </li>
   <li class="col-md-3 col-sm-3 col-xs-3"><strong>Sunday</strong>
         <canvas class="rain" width="50" height="50"></canvas>
         <span>19&deg;</span>
   </li>
   <li class="col-md-3 col-sm-3 col-xs-3"><strong>Monday</strong>
         <canvas class="sleet" width="50" height="50"></canvas>
         <span>19&deg;</span>
   </li>
   <li class="col-md-3 col-sm-3 col-xs-3"><strong>Wednesday</strong>
         <canvas class="snow" width="50" height="50"></canvas>
         <span>19&deg;</span>
   </li>

如果您需要支持 IE8 及更早版本，您需要为 getElementsByClassName 函数使用此 polyfill:Polyfill for getElementsByClassName for particular uses