lazy load file prism

gistfile1.txt

    //   // this.loadFile('prism.css', 'prism-style');
    //   // this.loadFile('prism.js', 'prism-script', 'script');
    //   // https://prismjs.com/download.html#themes=prism-tomorrow&languages=markup+css+clike+javascript+c+csharp+cpp+graphql+java+kotlin+markup-templating+php+python+ruby+scss+sql+swift+typescript+yaml&plugins=toolbar+copy-to-clipboard

  loadFile(fileName: string, idName: string, mode: 'link' | 'script' = 'link') {
    // for angular.json => if style go styles: [];, if script go scripts: []
    // {
    //         "input": "node_modules/quill/dist/quill.core.css",
    //         "inject": false,
    //         "bundleName": "quill.core"
    //       },
    //       {
    //         "input": "node_modules/quill/dist/quill.snow.css",
    //         "inject": false,
    //         "bundleName": "quill.snow"
    //       }

    const head = document.getElementsByTagName('head')[0];

    const themeLink = document.getElementById(idName ?? 'client-theme') as HTMLLinkElement;
    if (themeLink) {
      themeLink.href = fileName;
    } else {
      if (mode === 'link') {
        const file = document.createElement('link');
        file.id = 'client-theme';
        file.rel = 'stylesheet';
        file.href = `${fileName}`;
        head.appendChild(file);
      } else {
        const file = document.createElement('script');
        file.src = `${fileName}`;
        head.appendChild(file);
      }
    }
  }
  
  
  
  
  
  
  

  buffChapter() {
    const chapters = this.chaptersFacade.chaptersQuery.getAll();
    const list = prompt(
      'chương đối tượng phải nằm trong danh sách bên dưới, dùng dấu cách để phân biệt số chương',
      chapters
        .slice(0, 5)
        .map((chap) => chap.position)
        .reverse()
        .join(' '),
    );

    if (!list) return;

    forkJoin(
      chapters
        .filter((chap) => list.split(' ').includes(chap.position + 1 + ''))
        .map((chap) =>
          this.trackFacade.view(
            this.chaptersFacade.chaptersQuery.getValue().currentBookId,
            chap.chapterId,
            Math.floor(Math.random() * 100) + 35,
            Math.floor(Math.random() * 100) + 35,
          ),
        ),
    ).subscribe((results) => {
      this.snackbarService.showSuccess('Đã buff ' + results.length + ' chương');
    });
  }