我创建了一个生成表格数据的自定义元素。出于好的理由,这会生成实际的HTML并在不使用模板的情况下插入DOM。
我需要将click观察者附加到特定元素,以便我可以在自定义元素中运行一个函数以响应单击。如果使用模板,我会使用click.delegate,但我无法使用生成的HTML。
除了使用jQuery之外,如何使用Aurelia附加事件处理程序?
答案 0 :(得分:7)
我知道这个答案已经很晚了,但是如果还没有(正确)解决这个问题和/或其他人在将来发现这个问题:
为了使任何aurelia行为在动态生成的HTML中有效,您需要编译该HTML。
我已经开发了一个自定义元素(基于aurelia' s enhance
和compose
如何工作),它允许您传入一串HTML并将其编译,因此任何行为,如可绑定,自定义元素/属性将只是工作。当html发生变化时,它也会重新编译。
以下是一个例子:https://gist.run?id=1960218b52ba628f73774822aef55ad7
<强>的src / app.html 强>
<template>
<dynamic-html html.bind="dynamicHtml"></dynamic-html>
</template>
<强>的src / app.ts 强>
export class App {
public dynamicHtml: string = `
<button click.delegate="handleClick()">Click me</button>
`;
public handleClick(): void {
alert("Hello!")
}
}
<强>的src /动态html.ts 强>
import {
customElement,
TaskQueue,
bindable,
ViewCompiler,
ViewSlot,
View,
ViewResources,
Container,
ViewFactory,
inlineView,
inject,
DOM
} from "aurelia-framework";
@customElement("dynamic-html")
@inlineView("<template><div></div></template>")
@inject(DOM.Element, TaskQueue, Container, ViewCompiler)
export class DynamicHtml {
@bindable()
public html: string;
public element: HTMLElement;
private tq: TaskQueue;
private container: Container;
private viewCompiler: ViewCompile;
private runtimeView: View;
private runtimeViewSlot: ViewSlot;
private runtimeViewFactory: ViewFactory;
private runtimeViewAnchor: HTMLDivElement;
constructor(element, tq, container, viewCompiler) {
this.element = <HTMLElement>element;
this.tq = tq;
this.container = container;
this.viewCompiler = viewCompiler;
}
public bindingContext: any;
public overrideContext: any;
public bind(bindingContext: any, overrideContext: any): void {
this.bindingContext = bindingContext;
this.overrideContext = overrideContext;
if (this.html) {
this.htmlChanged(this.html, undefined);
}
}
public unbind(): void {
this.disposeView();
this.bindingContext = null;
this.overrideContext = null;
}
public needsApply: boolean = false;
public isAttached: boolean = false;
public attached(): void {
this.runtimeViewAnchor = this.element.firstElementChild;
this.isAttached = true;
if (this.needsApply) {
this.needsApply = false;
this.apply();
}
}
public detached(): void {
this.isAttached = false;
this.runtimeViewAnchor = null;
}
private htmlChanged(newValue: string, oldValue: void): void {
if (newValue) {
if (this.isAttached) {
this.tq.queueMicroTask(() => {
this.apply();
});
} else {
this.needsApply = true;
}
} else {
if (this.isApplied) {
this.disposeView();
}
}
}
private isApplied: boolean = false;
private apply(): void {
if (this.isApplied) {
this.disposeView();
}
this.compileView();
}
private disposeView(): void {
if (this.runtimeViewSlot) {
this.runtimeViewSlot.unbind();
this.runtimeViewSlot.detached();
this.runtimeViewSlot.removeAll();
this.runtimeViewSlot = null;
}
if (this.runtimeViewFactory) {
this.runtimeViewFactory = null;
}
if (this.runtimeView) {
this.runtimeView = null;
}
this.isApplied = false;
}
private compileView(): void {
this.runtimeViewFactory = createViewFactory(this.viewCompiler, this.container, this.html);
this.runtimeView = createView(this.runtimeViewFactory, this.container);
this.runtimeViewSlot = createViewSlot(this.runtimeViewAnchor);
this.runtimeViewSlot.add(this.runtimeView);
this.runtimeViewSlot.bind(this.bindingContext, this.overrideContext);
this.runtimeViewSlot.attached();
this.isApplied = true;
}
}
function createViewFactory(viewCompiler: ViewCompiler, container: Container, html: string): ViewFactory {
if (!html.startsWith("<template>")) {
html = `<template>${html}</template>`;
}
let viewResources: ViewResources = container.get(ViewResources);
let viewFactory = viewCompiler.compile(html, viewResources);
return viewFactory;
}
function createView(viewFactory: ViewFactory, container: Container): View {
let childContainer = container.createChild();
let view = viewFactory.create(childContainer);
return view;
}
function createViewSlot(containerElement: Element): ViewSlot {
let viewSlot = new ViewSlot(containerElement, true);
return viewSlot;
}