重复提供作为内容的元素 [英] Repeat over elements provided as content
本文介绍了重复提供作为内容的元素的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
当我在Angular.dart中创建一个组件，如
When I create a component in Angular.dart like
library main;
import 'package:angular/angular.dart';
import 'package:di/di.dart';
class Item {
String name;
Item(this.name);
}
@NgComponent(
selector: 'my-component',
publishAs: 'ctrl',
applyAuthorStyles: true,
template: '''<div ng-repeat="value in ctrl.values"><span>{{value.name}}</span> - <content><content></div>'''
)
class MyComponent {
List<Item> values = [new Item('1'), new Item('2'), new Item('3'), new Item('4')];
MyComponent() {
print('MyComponent');
}
}
class MyAppModule extends Module {
MyAppModule() {
type(MyComponent);
}
}
void main() {
ngBootstrap(module: new MyAppModule());
}
并使用
<!DOCTYPE html>
<html ng-app>
<head>
<meta charset="utf-8">
</head>
<body>
<h3>Repeat</h3>
<my-component>
<div>some provided content to repeat</div>
</my-component>
<script type="application/dart" src="index.dart"></script>
<script src="packages/browser/dart.js"></script>
</body>
</html>
我得到
我知道 < content> 标签在web组件中不起作用。
I know the <content> tag isn't working that way in web components.
但是有其他方法，我的组件，获得作为子元素提供的< div> 重复？
But is there any other way, some manipulation I can do in my component, to get the <div> provided as child element repeated?
推荐答案
我解决了这个问题
code>< my-component>
Code of <my-component>
@NgComponent(
selector: 'my-component',
publishAs: 'ctrl',
template: '''<div ng-repeat="value in ctrl.values"><span ng-bind-nodes="ctrl.nodes"></span><span>something hardcoded: {{value.name}}</span></div><content id='content'></content>'''
)
class MyComponent extends NgShadowRootAware {
List<Item> values = [new Item('1'), new Item('2'), new Item('3'), new Item('4')];
List<dom.Node> nodes = new List<dom.Node>();
MyComponent();
@override
void onShadowRoot(dom.ShadowRoot shadowRoot) {
nodes.addAll((shadowRoot.querySelector('#content') as dom.ContentElement).getDistributedNodes());
//nodes.forEach((n) => print(n));
nodes.forEach((n) => n.remove());
}
}
组件删除其子节点，并在字段节点
The component removes it's child nodes and provides them in the field nodes
指令 ng-bind-nodes
将节点添加到应用它的元素
the directive ng-bind-nodes adds the nodes to the element where it is applied
@NgDirective(
selector: '[ng-bind-nodes]',
publishAs: 'ctrlx' // conflicts with my-component
)
class NgBindNodesDirective {
dom.Element _element;
MyComponent _myComponent;
Scope _scope;
Compiler _compile;
Injector _injector;
NgBindNodesDirective(this._element, this._myComponent, this._scope, this._compile, this._injector);
@NgOneWay('ng-bind-nodes') set nodes(var nodes) {
print(nodes);
if(nodes == null) {
return;
}
_element.nodes.clear();
nodes.forEach((dom.Node node) {
_element.nodes.add(node.clone(true));
});
BlockFactory template = _compile(_element.nodes);
Block block = template(_injector, _element.nodes);
}
}
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