在 Angular 应用程序的销毁钩子中手动清除导入的脚本。以下是一个示例：

import { Component, OnDestroy } from '@angular/core';
import { ScriptService } from './script.service';

@Component({
  selector: 'app-root',
  template: '
Hello World
',
})
export class AppComponent implements OnDestroy {
  constructor(private scriptService: ScriptService) {}

  ngOnDestroy() {
    this.scriptService.destroy();
  }
}

在上面的示例中，AppComponent 实现了 OnDestroy 接口，并在其 ngOnDestroy 生命周期钩子中调用 ScriptService 的 destroy() 方法。ScriptService 中包含了逻辑来清理所导入的脚本。要创建 ScriptService，请使用以下代码：

import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root',
})
export class ScriptService {
  private scripts: any = {};

  constructor() {}

  load(...scripts: string[]) {
    const promises = [];
    scripts.forEach((url) => {
      if (!this.scripts[url]) {
        this.scripts[url] = this.loadScript(url);
        promises.push(this.scripts[url]);
      }
    });
    return Promise.all(promises);
  }

  loadScript(url: string): Promise {
    return new Promise((resolve, reject) => {
      const script = document.createElement('script');
      script.type = 'text/javascript';
      script.src = url;

      script.onload = () => {
        resolve();
      };

      script.onerror = (error: any) => {
        reject(error);
      };

      document.body.appendChild(script);
    });
  }

  destroy() {
    const scripts = document.getElementsByTagName('script');
    for (let i = 0; i < scripts.length; i++) {
      const script = scripts[i];
      const src = script.getAttribute('src');
      if (src && this.scripts[src]) {
        script.remove();
        delete this.scripts[src];
      }
    }
  }
}

在上面的示例中，ScriptService 包含了 load() 方法，用于加载脚本，并且包含了 destroy()