自动绑定飞镖不工作，失败与错误状态错误 [英] auto-binding-dart is not working, fails with Bad State Error
问题描述
我试图运行这个自动绑定dart的基本示例自动绑定飞镖源。但它失败了
I am trying to run this basic example of auto-binding-dart auto binding dart source. But it fails with
突破异常：错误状态：模板必须在
之前清除新的bindingDelegate
Breaking on exception: Bad state: Template must be cleared before a new bindingDelegate can be assigned
我使用stagehand polymerapp模板。
index.html
I am doing this using stagehand polymerapp template. index.html
<html>
<head>
<link rel="import" href="../lib/main_app.html">
<link rel="stylesheet" href="styles.css">
<script type="application/dart">export 'package:polymer/init.dart';</script>
</head>
<body unresolved>
<main-app></main-app>
</body>
</html>
main_app.html
main_app.html
<link rel="import" href="../../packages/polymer/polymer.html">
<polymer-element name="main-app">
<template id="my-template" is="auto-binding-dart">
<style>
:host {
display: block;
}
</style>
<div>Say something: <input value="{{value}}"></div>
<div>You said: {{value}}</div>
<button on-tap="{{buttonTap}}">Tap me!</button>
</template>
<script type="application/dart" src="main_app.dart"></script>
</polymer-element>
main_app.dart
main_app.dart
import 'dart:html';
import 'package:polymer/polymer.dart';
@CustomTag('main-app')
class MainApp extends PolymerElement {
/// Constructor used to create instance of MainApp.
MainApp.created() : super.created();
ready(){
super.ready();
var template = document.querySelector('#my-template');
template.model = new MyModel();
}
}
class MyModel {
String value = 'something';
buttonTap() => window.console.info('tap!');
}
推荐答案
请在另一个模板中使用< template is =auto-binding-dart> 。
You don't need to use the <template is="auto-binding-dart"> inside another template.
自动绑定点的目的是在Polymer元素外部具有一个用于胡子绑定的上下文。您可以使用自动绑定功能而不是主应用不在中。
The point of auto-binding-dart is to have a context for mustache binding outside a Polymer element. You could use auto-binding-dart instead of your main-app not inside.
最外面的<$ c $
The outermost <template> tag inside your <polymer-element ...> uses the elements class automatically as model (binding context).
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