Misago/frontend/src/services/include.js

export class Include {
  init(staticUrl) {
    this._staticUrl = staticUrl;
    this._included = [];
  }

  include(script, remote=false) {
    if (this._included.indexOf(script) === -1) {
      this._included.push(script);
      this._include(script, remote);
    }
  }

  _include(script, remote) {
    $.ajax({
      url: (!remote ? this._staticUrl : '') + script,
      cache: true,
      dataType: 'script'
    });
  }
}

export default new Include();