html-bundler-webpack-plugin/src/Loader/PreprocessorFilters/markdown/index.js

Generates complete single-page or multi-page website from source assets. Built-in support for Markdown, Eta, EJS, Handlebars, Nunjucks, Pug. Alternative to html-webpack-plugin.

class Filter {
  static MarkdownFilter = null;

  static getInstance(options) {
    if (!this.MarkdownFilter) {
      // lazy load module only on demand
      this.MarkdownFilter = require('./MarkdownFilter');
      this.MarkdownFilter.init(options);
    }

    return this.MarkdownFilter;
  }
}

module.exports = Filter;