Angular2动态插入脚本标签

Question

我正在从服务器内容进入 json 对象字段，它是 html、<style></style> 和 <script></script> 标签，我想执行它这个：

[innerHtml]="content | sanitize"，但 <script></script> 标签不执行。有可能让它发挥作用吗？

我的消毒管道是这样的：

import {Pipe} from '@angular/core';
import {DomSanitizationService} from '@angular/platform-browser';

@Pipe({
    name: 'sanitize',
    pure: true
})
export class Sanitize {
    constructor(private sanitizer: DomSanitizationService) {

    }

    transform(html: string) {

        return this.sanitizer.bypassSecurityTrustHtml(html);
    }
}

我知道 DomSanitizationService 中有 bypassSecurityTrustScript 功能，但我该如何使用它？

Answer 1

这不是 angular 2 的问题，script 通过 innerHTML 插入的标签没有被执行。

如果您有包含 script 标签的 html 字符串，请按以下方式插入：

const fragment = document.createRange().createContextualFragment(yourHtmlString);
anyElement.appendChild(fragment);

Answer 2

没有angular方法...你需要这样做....

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

@Pipe({
  name: 'sanitize',
  pure: true
})
export class Sanitize {

  constructor(private domSanitizer: DomSanitizer) { }


  handleExternalScriptsInHtmlString(string) {
    let that = this;
    var parser = new DOMParser();
    var scripts = parser.parseFromString(string, 'text/html').getElementsByTagName('script');
    var results = [];

    for (var i = 0; i < scripts.length; i++) {
      var src = scripts[i].getAttribute('src');
      if (src.length && results.indexOf(src) === -1) {
        results.push(src);
        that.addScript(src);
      }
    }

    return results;
  }

  addScript(src) {
    var script = document.createElement('script');
    script.setAttribute('src', src);
    document.body.appendChild(script);
  }


  transform(htmlContent: any) {
    let sanitizeHtmlContent = this.domSanitizer.bypassSecurityTrustHtml(htmlContent);

    this.handleExternalScriptsInHtmlString(htmlContent);

    return sanitizeHtmlContent;
  }
}

Answer 3

这将解决问题...

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

@Pipe({
  name: 'sanitize',
  pure: true
})
export class Sanitize {

  constructor(private domSanitizer: DomSanitizer) { }


  handleExternalScriptsInHtmlString(string) {
    let that = this;
    var parser = new DOMParser();
    var scripts = parser.parseFromString(string, 'text/html').getElementsByTagName('script');
    var results = [];

    for (var i = 0; i < scripts.length; i++) {
      var src = scripts[i].getAttribute('src');
      if (src.length && results.indexOf(src) === -1) {
        results.push(src);
        that.addScript(src);
      }
    }

    return results;
  }

  addScript(src) {
    var script = document.createElement('script');
    script.setAttribute('src', src);
    document.body.appendChild(script);
  }


  transform(htmlContent: any) {
    let sanitizeHtmlContent = this.domSanitizer.bypassSecurityTrustHtml(htmlContent);

    this.handleExternalScriptsInHtmlString(htmlContent);

    return sanitizeHtmlContent;
  }
}

Angular2动态插入脚本标签

Angular2 dynamically insert script tag

javascript

html

angular

angular2-services