我正在写一个Angular应用程序,我有一个HTML响应,我想显示。

我怎么做呢?如果我简单地使用绑定语法{{myVal}},它将编码所有HTML字符(当然)。

我需要以某种方式将一个div的innerHTML绑定到变量值。


当前回答

如果你想在Angular 2或Angular 4中使用它,同时还想保持内联CSS,那么你可以使用它

<div [innerHTML]="theHtmlString | keepHtml"></div>

其他回答

如果我错过了重点,我很抱歉,但我想推荐一种不同的方法:

我认为最好从服务器端应用程序返回原始数据,并将其绑定到客户端模板。这使得请求更加灵活,因为您只从服务器返回json。

对我来说,如果你所做的只是从服务器获取html并将其“原样”注入到DOM中,那么使用Angular似乎没有意义。

我了解Angular 1。x有一个html绑定,但我在Angular 2.0中还没有看到对应的绑定。不过他们以后可能会加进去。不管怎样,我还是会考虑为你的Angular 2.0应用提供一个数据api。

如果您感兴趣的话,这里有一些带有简单数据绑定的示例:http://www.syntaxsuccess.com/viewarticle/angular-2.0-examples

你可以为样式、链接和HTML应用多个管道,如下所示。HTML

<div [innerHTML]="announcementContent | safeUrl| safeHtml">
                    </div>

在.ts管道中为“URL”消毒器

import { Component, Pipe, PipeTransform } from '@angular/core';
import { DomSanitizer } from '@angular/platform-browser';

@Pipe({ name: 'safeUrl' })
export class SafeUrlPipe implements PipeTransform {
    constructor(private sanitizer: DomSanitizer) {}
    transform(url) {
        return this.sanitizer.bypassSecurityTrustResourceUrl(url);
    }
}

用于“HTML”消毒器的管道

import { Component, Pipe, PipeTransform } from '@angular/core';
import { DomSanitizer } from '@angular/platform-browser';

@Pipe({
    name: 'safeHtml'
})
export class SafeHtmlPipe implements PipeTransform {
    constructor(private sanitized: DomSanitizer) {}
    transform(value) {
        return this.sanitized.bypassSecurityTrustHtml(value);
    }
}

这将在不影响任何样式和链接单击事件的情况下应用

我已经建立下面的库,这将有助于重新绑定html格式的绑定。 请找到下面使用这个库的步骤。这个库基本上允许在AOT中注入JIT编译器代码

Install library using npm i angular-html-recompile Add below code in app.component.html file <pk-angular-html-recompile *ngIf="template !== ''" [stringTemplate]="template" [data]="dataObject"> </pk-angular-html-recompile> Use below code in app.component.ts file import { Component, OnInit, ViewChild } from '@angular/core'; import { AngularHtmlRecompileComponent, AngularHtmlRecompileService } from 'angular-html-recompile'; @Component({ selector: 'app-root', templateUrl: './app.component.html', styleUrls: ['./app.component.scss'] }) export class AppComponent implements OnInit { @ViewChild(AngularHtmlRecompileComponent, { static: true }) comp !: AngularHtmlRecompileComponent; constructor( private angularHtmlRecompileService: AngularHtmlRecompileService) { } public dataObject: any; public template = `<div class="login-wrapper" fxLayout="row" fxLayoutAlign="center center"> <mat-card class="box"> <mat-card-header> <mat-card-title>Register</mat-card-title> </mat-card-header> <form class="example-form"> <mat-card-content> <mat-form-field class="example-full-width"> <input matInput placeholder="Username" [value]="Username" (keydown)="onControlEvent($event,'Username')"> </mat-form-field> <mat-form-field class="example-full-width"> <input matInput placeholder="Email" [value]="Email" (keydown)="onControlEvent($event,'Email')"> </mat-form-field> <mat-form-field *ngIf="isShow" class="example-full-width"> <input matInput placeholder="Password" [value]="Password" (keydown)="onControlEvent($event,'Password')"> </mat-form-field> <mat-form-field class="example-full-width"> <mat-label>Choose a role...</mat-label> <mat-select (selectionChange)="onControlEvent($event, 'selectedValue')"> <mat-option [value]="roles" *ngFor="let roles of Roles">{{roles}} </mat-option> </mat-select> </mat-form-field> </mat-card-content> <button mat-stroked-button color="accent" class="btn-block" (click)="buttomClickEvent('submit')" >Register</button> </form> </mat-card> </div>`; ngOnInit(): void { this.angularHtmlRecompileService.sharedData.subscribe((respose: any) => { if (respose) { switch (respose.key) { case `Username`: // Call any method on change of name break; case `Password`: //Update password from main component this.comp[`cmpRef`].instance['Password'] = "Karthik"; break; case `submit`: //Get reference of all parameters on submit click //1. respose.data OR //use this.comp[`cmpRef`].instance break; default: break; } } }); this.prepareData(); } prepareData() { //Prepare data in following format only for easy binding //Template preparation and data preparation can be done once data received from service // AngularHtmlRecompileComponent will not be rendered until you pass data this.dataObject = [ { key: 'Username', value: 'Pranay' }, { key: 'Email', value: 'abc@test.com', }, { key: 'Password', value: 'test123', }, { key: 'Roles', value: ['Admin', 'Author', 'Reader'] }, { key: 'isShow', value: this.updateView() } ]; } updateView() { //Write down logic before rendering to UI to work ngIf directive return true; } } Add module into app.module.ts file import { NgModule } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { AppComponent } from './app.component'; import { AngularHtmlRecompileModule } from "angular-html-recompile"; @NgModule({ declarations: [ AppComponent ], imports: [ BrowserModule, AngularHtmlRecompileModule ], providers: [], bootstrap: [AppComponent] }) export class AppModule { } This library supports basic html, Angular material, flex layouts. To use this features install below dependencies npm i -s @angular/material @angular/flex-layout

只需简单地使用[innerHTML]属性在你的HTML,如下所示:

<div [innerHTML]="myVal"></div>

你的组件中是否有包含html标记或 需要在模板中显示的实体?传统的 插值不会工作,但是innerHTML属性绑定会 救援。

使用{{myVal}}不能正常工作!这不会拾取HTML标签,如<p>, <strong>等,只将其作为字符串传递…

假设你的组件中有这样的代码:

碰到弦!弦!弦!< /埃隆·马斯克>”

如果你使用{{myVal}},你会在视图中得到这个:

<strong>Stackoverflow</strong> is <em>helpful!</em>

但是使用[innerHTML]="myVal"使结果像预期的那样:

Stackoverflow很有用!

动态添加元素到DOM的方法,正如在Angular 2文档中解释的那样,是使用@Angular/core中的ViewContainerRef类。

你要做的是声明一个指令,它将实现ViewContainerRef,并充当DOM上的占位符。

指令

import { Directive, ViewContainerRef } from '@angular/core';

@Directive({
  selector: '[appInject]'
})
export class InjectDirective {

  constructor(public viewContainerRef: ViewContainerRef) { }

}

然后,在你想要注入组件的模板中:

HTML

<div class="where_you_want_to_inject">    
  <ng-template appInject></ng-template>
</div>

然后,从注入的组件代码中,注入包含你想要的HTML的组件:

import { Component, OnInit, ViewChild, ComponentFactoryResolver } from '@angular/core';
import { InjectDirective } from '../inject.directive';
import { InjectedComponent } from '../injected/injected.component';

@Component({
  selector: 'app-parent',
  templateUrl: './parent.component.html',
  styleUrls: ['./parent.component.css']
})
export class ParentComponent implements OnInit {

  @ViewChild(InjectDirective) injectComp: InjectDirective;

  constructor(private _componentFactoryResolver: ComponentFactoryResolver) {
  }

  ngOnInit() {
  }

  public addComp() {
    const componentFactory = this._componentFactoryResolver.resolveComponentFactory(InjectedComponent);
    const viewContainerRef = this.injectComp.viewContainerRef;
    const componentRef = viewContainerRef.createComponent(componentFactory);
  }

  public removeComp() {
    const componentFactory = this._componentFactoryResolver.resolveComponentFactory(InjectedComponent);
    const viewContainerRef = this.injectComp.viewContainerRef;
    const componentRef = viewContainerRef.remove();
  }

}

我在Angular 2上添加了一个完全可用的演示应用,动态地将组件添加到DOM演示中