davismj/app.html

## app.html
<template>
  <compose view-model="comp" view-model.ref="compose"></compose>
  <button click.delegate="canDeactivate()">can deactivate?</button>
  <button click.delegate="deactivate()">deactivate?</button>

  <p>Could deactivate: ${couldDeactivate}</p>
  <p>Deactivated: ${deactivated}</p>
</template>

## app.js
export class App {
  couldDeactivate = false;
  deactivated = false;
  canDeactivate() {
    const vm = this.compose.currentViewModel;
    return Promise.resolve((vm && vm.canDeactivate) ? vm.canDeactivate() : true)
      .then((could) => this.couldDeactivate = !!could);
  }

  deactivate() {
    const vm = this.compose.currentViewModel;
    return Promise.resolve((vm && vm.deactivate) ? vm.deactivate() : null)
      .then(() => this.deactivated = true);
  }
}

## comp.html
<template>
  composed
</template>

## comp.js
export class ComposedViewModel {
  canDeactivate() {
    return this.checkIfSaved() || confirm('unsaved changes bro')
  }

  deactivate() {
    return this.save();
  }

  checkIfSaved() {
    return false
  }

  save() {
    return new Promise(resolve => setTimeout(resolve, 2000));
  }
}

## index.html
<!doctype html>
<html>
  <head>
    <title>Table Example</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
  </head>
  <body aurelia-app="main">
    <h1>Loading...</h1>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.6/system.js"></script>
    <script src="https://rawgit.com/aurelia-ui-toolkits/aurelia-materialize-bundles/0.30.0/config2.js"></script>
    <script>
      System.import('aurelia-bootstrapper');
    </script>
  </body>
</html>

## main.js
/*******************************************************************************
 * The following two lines enable async/await without using babel's
 * "runtime" transformer. Uncomment the lines if you intend to use async/await.
 *
 * More info here:  https://github.com/jdanyow/aurelia-plunker/issues/2
 */
//import regeneratorRuntime from 'babel-runtime/regenerator';
//window.regeneratorRuntime = regeneratorRuntime;
/******************************************************************************/

import 'materialize';

export function configure(aurelia) {
  aurelia.use
    .standardConfiguration()
    .developmentLogging()
    .plugin('aurelia-materialize-bridge', bridge => bridge.useAll() );

  aurelia.start().then(a => a.setRoot());
}
	<template>
	<compose view-model="comp" view-model.ref="compose"></compose>
	<button click.delegate="canDeactivate()">can deactivate?</button>
	<button click.delegate="deactivate()">deactivate?</button>

	<p>Could deactivate: ${couldDeactivate}</p>
	<p>Deactivated: ${deactivated}</p>
	</template>
	export class App {
	couldDeactivate = false;
	deactivated = false;
	canDeactivate() {
	const vm = this.compose.currentViewModel;
	return Promise.resolve((vm && vm.canDeactivate) ? vm.canDeactivate() : true)
	.then((could) => this.couldDeactivate = !!could);
	}

	deactivate() {
	const vm = this.compose.currentViewModel;
	return Promise.resolve((vm && vm.deactivate) ? vm.deactivate() : null)
	.then(() => this.deactivated = true);
	}
	}
	export class ComposedViewModel {
	canDeactivate() {
	return this.checkIfSaved() \|\| confirm('unsaved changes bro')
	}

	deactivate() {
	return this.save();
	}

	checkIfSaved() {
	return false
	}

	save() {
	return new Promise(resolve => setTimeout(resolve, 2000));
	}
	}
	<!doctype html>
	<html>
	<head>
	<title>Table Example</title>
	<meta name="viewport" content="width=device-width, initial-scale=1">
	</head>
	<body aurelia-app="main">
	<h1>Loading...</h1>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.6/system.js"></script>
	<script src="https://rawgit.com/aurelia-ui-toolkits/aurelia-materialize-bundles/0.30.0/config2.js"></script>
	<script>
	System.import('aurelia-bootstrapper');
	</script>
	</body>
	</html>
	/*******************************************************************************
	* The following two lines enable async/await without using babel's
	* "runtime" transformer. Uncomment the lines if you intend to use async/await.
	*
	* More info here: https://github.com/jdanyow/aurelia-plunker/issues/2
	*/
	//import regeneratorRuntime from 'babel-runtime/regenerator';
	//window.regeneratorRuntime = regeneratorRuntime;
	/******************************************************************************/

	import 'materialize';

	export function configure(aurelia) {
	aurelia.use
	.standardConfiguration()
	.developmentLogging()
	.plugin('aurelia-materialize-bridge', bridge => bridge.useAll() );

	aurelia.start().then(a => a.setRoot());
	}