Feature Request: Add option to add line numbers

[tommyc38]

Bug Report or Feature Request (mark with an x)

- [ ] bug report -> please search issues before submitting
- [x ] feature request
- [ ] question

OS and Version?

Versions

Repro steps

The log given by the failure

Desired functionality

I think it would be sweet if you added the ability to add line numbers as an options to the directive. See https://github.com/wcoder/highlightjs-line-numbers.js

Mention any other details that might be useful

[MurhafSousli]

For now, you can do this

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

declare const hljs: any;

@Component({
  selector: 'app',
  template: `
    <pre>
       <code highlight [code]="code" (highlighted)="onHighlight($event)"></code>
    </pre>
  `
})
export class AppComponent {

  code = `.......`;

  onHighlight(e) {
    hljs.initLineNumbersOnLoad();
  }
}

Here is a stackblitz

[MurhafSousli]

It would be better if we can implement the lines numbers in this package without relying on an external dependency, if anyone can help on this, PRs are welcome!

[alissonbovenzo]

i really excited for this feature, i'll go try do anything about this and i'll go open a PR in few days
[]'s