使用HTML导入来解决与Firefox上的聚合物的javascript依赖关系的难度苹果浏览器

时间:2015-03-27 00:58:43

标签: javascript polymer

我正在构建一个Polymer应用程序,并且难以导入javascript依赖项。我已经审核了this question,但解决方案对我不起作用 - lodash javascript无法通过HTML导入加载。使用lodash只是一个例子,我尝试以这种方式导入的任何库都存在问题。

以下测试代码在chrome中工作正常,但在firefox或safari中没有(除非我硫化它,我不应该这样做)。

的index.html

<!DOCTYPE html>
    <html lang="en">
    <head>
      <meta charset="utf-8">
      <title>Test Page</title>

      <script src="https://cdnjs.cloudflare.com/ajax/libs/webcomponentsjs/0.6.0/webcomponents.min.js"></script>

      <link rel="import" href="components/lodash/lodash.html">

      <link rel="import" href="components/test-component/test-component.html">
    </head>
    <body fullbleed unresolved>
      <script>
        window.addEventListener('WebComponentsReady', function(e) {
          console.log("Web Components Ready!");

          document.body.appendChild(document.createElement("test-component"));

          console.log("Index:" + _.now());
        });
      </script>
    </body>
    </html>

注1:WebComponentsReady在 HTMLImportsLoaded之后触发(参见here
注2:我也尝试过webcomponentsjs 0.5.5

测试component.html

<link rel="import" href="../../bower_components/polymer/polymer.html">

<link rel="import" href="../lodash/lodash.html">

<polymer-element name="test-component">
  <template>
    <style>
      :host {
        display: block;
        font-size: 2em;
        color: cornflowerBlue;
      }
    </style>

    <div id='test_elem' on-tap="{{go}}" fit layout horizontal center center-justified>
      Click Me!
    </div>

  </template>

  <script>
    Polymer({
      ready: function() {
        console.log("test-component component ready!");
      },

      go : function(event, detail, sender) {
        console.log("Component:" + _.now());
      }
    });
  </script>
</polymer-element>

lodash.html

<script type="application/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.5.0/lodash.min.js"></script>

safari控制台的有序输出:

Web Components Ready!
test-component component ready!
ReferenceError: Can't find variable: _

降低复杂性仍然会产生同样的问题:

index.html (更简单的版本)

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Test Page</title>

  <script src="https://cdnjs.cloudflare.com/ajax/libs/webcomponentsjs/0.6.0/webcomponents.min.js"></script>

  <link rel="import" href="components/test-component/test-component.html">
</head>
<body fullbleed unresolved>
  <test-component></test-component>
</body>
</html>

我可以在页面加载后随时点击组件,但错误仍然存​​在 - lodash.js永远不可用。我确信这里有一些显而易见的东西,但我很难解决它。

2 个答案:

答案 0 :(得分:2)

lodash.html中,从

中删除type="application/javascript"
<script type="application/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.5.0/lodash.min.js"></script>

更新

我在这里向webcomponents.js提交了一个错误:https://github.com/webcomponents/webcomponentsjs/issues/273

答案 1 :(得分:0)

你可以使用一个现成的lodash组件,如下所示:https://github.com/Waxolunist/lodash-element