Angular2 innerHtml绑定删除样式属性

Question

我的问题,当我使用innererHtml绑定时 - angular2删除所有样式属性.这对我来说很重要,因为在我的任务中 - html是在服务器端生成的,具有所有样式.例:

@Component({
  selector: 'my-app',
  template: `
    <input type="text" [(ngModel)]="html">
    <div [innerHtml]="html">
    </div>
  `,
})
export class App {
  name:string;
  html: string;
  constructor() {
    this.name = 'Angular2'
    this.html = "<span style=\"color:red;\">1234</span>";
  }
}

但是在DOM中我只看到1234而且这个文本不是红色的.

http://plnkr.co/edit/UQJOFMKl9OwMRIJ38U8D?p=preview

谢谢!

Answer 1

你可以利用DomSanitized它来避免它.

最简单的方法是创建自定义管道,如:

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

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

所以你可以使用它:

<div [innerHtml]="html | safeHtml"></div>

Plunker示例

Answer 2

我通过完成所需的导入改进了yurzui的例子:

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

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

我还必须在app.module.ts文件中添加该类

import ...
import {SafeHtmlPipe} from "./pipes/safehtml.pipe";
@NgModule({
    declarations: [
        AppComponent,
        ...,
        SafeHtmlPipe  <--
    ],
    imports: [...],
    providers: [...],
    bootstrap: [AppComponent]
})
export class AppModule {
}

Answer 3

请注意，sanitizer有几种方法可以信任内容，例如

return this.sanitizer.bypassSecurityTrustStyle(value);
return this.sanitizer.bypassSecurityTrustHtml(value);
return this.sanitizer.bypassSecurityTrustXxx(value); // - see docs [1]

通过/sf/answers/2876236541/

因此，这bypassSecurityTrustStyle可能也是您想要的，因为这将在HTML内容（value）中显示内联样式。

[1]文档：https : //angular.io/docs/ts/latest/api/platform-b​​rowser/index/DomSanitizer-class.html