Application route for delaying loading until components have finished.

route-application.js

export default class ApplicationRoute extends Route {

  model(params, transition) {

    if (this.fastboot && this.fastboot.isFastBoot) {
      let promise = new Promise((resolve, reject) => {
        let poll = () => {
          later(() => {
            if (this.finder.inFlightRequests.length === 0 && this.query.inFlightQueriesCount === 0) {
              scheduleOnce("afterRender", this, resolve)
              return
            } else {
              poll()
            }
          }, 50)
        }
        poll()
      })
      this.fastboot.deferRendering(promise)
    }

  }
}