Example of a *ngAwait directive and use.

ng_await_usage.html

<!-- 
  Assume we have the following Dart code:
    Future<String> onName => _nameService.getName();
-->

<!-- Default case: On future complete, load data as $value -->
<template [ngAwaitThen]="onName">
  Hello {{$value}}!
</template>

<!-- Advanced case: On error, timeout, etc -->
<template [ngAwait]="onError">
  <template [ngAwaitThen]>Hello {{$value}}!</template>
  <template [ngAwaitTimeout]>Timed out waiting...</template>
  <template [ngAwaitError]>Error occured: {{$error}}}!</template>
</template>