如何将HTML-String从component.ts传输到component.html [英] How to transfer HTML-String from component.ts to component.html

问题描述

我想问一下如何将HTML格式的字符串从 .component.ts 文件传输到 .component.html 文件中.

I would like to ask how to transfer a HTML format string from the .component.ts file into the .component.html file.

在我的应用程序中有一个布局文件夹. layout.component.ts 文件具有以下代码:

In my App there is a layout folder. The layout.component.ts file has the code:

import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'app-layout',
  templateUrl: './layout.component.html',
  styleUrls: ['./layout.component.css']
})

export class LayoutComponent implements OnInit {
  htmlText: string;

  constructor() {
   }

  ngOnInit() {
    this.htmlText = '<b>title</b> Title Hier <FONT color="blue"><i>some texts hier.</i></FONT>';
  }
}

均定义了文本及其HTML格式.因此，我想在浏览器中显示具有自己的HTML定义的文本.

Both the text and its HTML format are defined. Thus I want to show the text with its own HTML-defination in the browser.

layout.component.html 文件如下所示:

<h2>{{ htmlText }}</h2>

编译后，浏览器显示htmlText字符串的全文，但HTML格式只是被忽略了.

After compiling the browser shows the full text of the htmlText string, but the HTML format was just ignored.

我做错了什么?感谢您提供的任何提示+帮助.

What have I done wrong? Thanks for any kind of hint+help.

推荐答案

使用以下代码创建管道:

create a pipe with the following code:

import { Pipe, PipeTransform } from '@angular/core';
import { DomSanitizer, SafeHtml, SafeStyle, SafeScript, SafeUrl, SafeResourceUrl } from '@angular/platform-browser';


@Pipe({ name: 'keepHtml', pure: false })
export class SafePipe implements PipeTransform {
constructor(private _sanitizer: DomSanitizer) {
}

public transform(value: string, type: string): SafeHtml | SafeStyle | SafeScript | SafeUrl | SafeResourceUrl {
switch (type) {
    case 'html':
        return this._sanitizer.bypassSecurityTrustHtml(value);
    case 'style':
        return this._sanitizer.bypassSecurityTrustStyle(value);
    case 'script':
        return this._sanitizer.bypassSecurityTrustScript(value);
    case 'url':
        return this._sanitizer.bypassSecurityTrustUrl(value);
    case 'resourceUrl':
        return this._sanitizer.bypassSecurityTrustResourceUrl(value);
    default:
        throw new Error(`Unable to bypass security for invalid type: ${type}`);
}
}
}

，并且在html文件中，使用以下代码行:

and in the html file use the following line of code:

<div [innerHtml]="htmlBody | keepHtml: 'html'"></div>

这篇关于如何将HTML-String从component.ts传输到component.html的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！