Guide to dynamically displaying a markdown file in Angular?

Struggling to create an Angular component that can display markdown files on a webpage using the ngx-markdown library. The official demo of the library showcases a list of files it needs through require, which are then rendered:

In the demo's app.component.ts:

  blockquotes = require('raw-loader!./markdown/blockquotes.md');
  codeAndSynthaxHighlighting = require('raw-loader!./markdown/code-and-synthax-highlighting.md');
  emphasis = require('raw-loader!./markdown/emphasis.md');
  headers = require('raw-loader!./markdown/headers.md');
  horizontalRule = require('raw-loader!./markdown/horizontal-rule.md');
  images = require('raw-loader!./markdown/images.md');
  links = require('raw-loader!./markdown/links.md');
  lists = require('raw-loader!./markdown/lists.md');
  listsDot = require('raw-loader!./markdown/lists-dot.md');
  tables = require('raw-loader!./markdown/tables.md');

And in the demo's app.component.html:

<!-- HEADER -->
<section id="headers">
<h2 class="subtitle">Headers</h2>

<pre>{{ headers }}</pre>

<markdown>{{ headers }}</markdown>
</section>

Other sections follow this same pattern with different file requirements.

My goal is to create a method that dynamically changes the source file for the <markdown> tag. Here's my attempt:

  // Markdown variable.
  markdown;

  ngOnInit() {
    this.setMarkdown('home.md');
  }

  setMarkdown(file: string) {
    const path = 'raw-loader!./assets/markdown/' + file;
    this.markdown = require(path);
  }

However, I'm running into a compiler error:

ERROR in src/app/app.component.ts(24,21): error TS2591: Cannot find name 'require'. Do you need to install type definitions for node? Try `npm i @types/node` and then add `node` to the types field in your tsconfig.

How can I fix this issue and successfully implement a method that changes the markdown content source?

Answer №1

According to the guide available at https://www.npmjs.com/package/ngx-markdown#directive, you have the option to import a file using the [src] attribute:

<!-- data retrieved from an external source -->
<div markdown [src]="'path/to/file.md'" (load)="onLoad($event)" (error)="onError($event)"></div>

Answer №2

After numerous attempts and experimentation, a new method has been discovered for dynamically rendering markdown using the ngx-markdown package through http requests.

Utilize the HttpClient to fetch md files via http calls:

import { HttpClient } from '@angular/common/http';
import { MarkdownService } from 'ngx-markdown';

export class AppComponent {
  title = 'personal-blog';
  markdownRaw ='';
  markdown='';
  
  constructor(private mdService:MarkdownService, private 
 httpClient:HttpClient){ }

  async ngOnInit() {
    this.markdownRaw = await this._httpClient.get(`/assets/hello.md`, 
    {
      responseType: 'text'
    }).toPromise();
        
    this.markdown=this.mdService.compile(this.markdownRaw);
  }
    
  onLoad(data:any) {
    console.log(data);
  }
         
  onError(data:any){
    console.log(data);
  }
}

Now assign the initialized variable as the data property in the markdown directive:

<markdown [data]="markdown" (load)="onLoad($event)" (error)="onError($event)"></markdown>

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