webcomponents.js fails with error 404

问题

I'm seeing exceptions in my console when running my dart app related to webcomponents.js Everything is running as expected, should I ignore this exception?

Failed to load resource: the server responded with a status of 404 (Not Found)
  http://localhost:8080/packages/web_components/webcomponents.js

pubspec.yaml:

name: alm
description: alm
dependencies:
  browser: any
  # bootjack: any
  polymer: ">0.15.3"
  paper_elements: any
transformers:
- polymer:
    entry_points:
      - web/index.html

index.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Test</title>
  <!--
  <link rel="stylesheet" href="packages/bootjack/css/bootstrap.min.css">
  -->
  <link rel="import" href="packages/polymer/polymer.html">
  <link rel="import" href="packages/paper_elements/paper_button.html">
  <link rel="import" href="packages/paper_elements/paper_input.html">  
</head>
<body unresolved>
  <script type="application/dart" src="index.dart"></script>

  <div id="more-buttons">
    <paper-button raised class="colored">colored</paper-button>
    <paper-button raised disabled>disabled</paper-button>
  </div>

  <script src="packages/browser/dart.js"></script>
</body>
</html>

index.dart:

import 'dart:html';
import 'package:polymer/polymer.dart';
//import 'package:bootjack/bootjack.dart';
import 'package:paper_elements/paper_button.dart';
import 'package:paper_elements/paper_input.dart';

void main() {

  print("begin");

  initPolymer().run(() {
    Polymer.onReady.then((_) {

      DivElement div = querySelector("#more-buttons");

      div.appendHtml("123");

      PaperButton y = new PaperButton();
      y.text = "KOTS";
      y.raised = true;
      div.append(y);

      PaperInput x = new PaperInput();
      x.value = "KOTS";
      div.append(x);

    });
  });

  print("end");
}

回答1:

Fox32 suggested that I delete my ~/.pub folder and do a pub get again. After doing that, I ran into pub running out of memory the whole time.

Timo D suggested I also delete ~/.pub-cache which I did. After another pub get and pub serve, it's running perfectly.

Thanks Timo D and Fox32 !!

来源：https://stackoverflow.com/questions/27519217/webcomponents-js-fails-with-error-404

标签

dart

dart-polymer

dart-pub