petmat/app.html

## app.html
<template>
  <require from="./tree"></require>
  <h1>The two-way binding problem</h1>
  <tree nodes.two-way="fruits"></tree>
  <button type="button" click.delegate="changeFruits()">Change fruits</button>

  <p repeat.for="message of messages">${message}</p>
</template>

## app.js
import { observable } from 'aurelia-framework';

export class App {
  @observable fruits = ['apple', 'orange', 'banana'];
  messages = [];
  messageCount = 0;

  changeFruits() {
    this.fruits = ['pear', 'apricot'];
  }

  fruitsChanged(newValue) {
    console.log(`Tried to change fruits to ${newValue}`);
  }
}

## index.html
<!doctype html>
<html>
  <head>
    <title>Aurelia</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
  </head>
  <body aurelia-app>
    <h1>Loading...</h1>

    <script src="https://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/jspm_packages/system.js"></script>
    <script src="https://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/config.js"></script>
    <script>
      System.import('aurelia-bootstrapper');
    </script>
  </body>
</html>

## tree.html
<template>
  <button type="button" click.delegate="clearNodes()">Clear nodes</button>
  <ul>
    <li repeat.for="node of nodes">${node}</li>
  </ul>
</template>

## tree.js
import { bindable, inject, TaskQueue } from 'aurelia-framework';

@inject(TaskQueue)
export class Tree {
  @bindable nodes;

  constructor(taskQueue) {
    this.taskQueue = taskQueue;
  }

  nodesChanged(newValues) {
    this.run(() => {
      console.log(`We have new nodes: ${newValues}`);
      this.selectNodes(newValues.filter(val => val !== 'pear'));
    });
  }

  run(action) {
    if (this.locked) { return; }
    action();
  }

  clearNodes() {
    this.nodes = [];
  }

  locked = false;

  selectNodes(nodes) {
    this.locked = true;

    this.nodes = nodes.slice();
    this.taskQueue.flushMicroTaskQueue();

    this.locked = false;
  }
}
	<template>
	<require from="./tree"></require>
	<h1>The two-way binding problem</h1>
	<tree nodes.two-way="fruits"></tree>
	<button type="button" click.delegate="changeFruits()">Change fruits</button>

	<p repeat.for="message of messages">${message}</p>
	</template>
	import { observable } from 'aurelia-framework';

	export class App {
	@observable fruits = ['apple', 'orange', 'banana'];
	messages = [];
	messageCount = 0;

	changeFruits() {
	this.fruits = ['pear', 'apricot'];
	}

	fruitsChanged(newValue) {
	console.log(`Tried to change fruits to ${newValue}`);
	}
	}
	<!doctype html>
	<html>
	<head>
	<title>Aurelia</title>
	<meta name="viewport" content="width=device-width, initial-scale=1">
	</head>
	<body aurelia-app>
	<h1>Loading...</h1>

	<script src="https://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/jspm_packages/system.js"></script>
	<script src="https://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/config.js"></script>
	<script>
	System.import('aurelia-bootstrapper');
	</script>
	</body>
	</html>
	<template>
	<button type="button" click.delegate="clearNodes()">Clear nodes</button>
	<ul>
	<li repeat.for="node of nodes">${node}</li>
	</ul>
	</template>
	import { bindable, inject, TaskQueue } from 'aurelia-framework';

	@inject(TaskQueue)
	export class Tree {
	@bindable nodes;

	constructor(taskQueue) {
	this.taskQueue = taskQueue;
	}

	nodesChanged(newValues) {
	this.run(() => {
	console.log(`We have new nodes: ${newValues}`);
	this.selectNodes(newValues.filter(val => val !== 'pear'));
	});
	}

	run(action) {
	if (this.locked) { return; }
	action();
	}

	clearNodes() {
	this.nodes = [];
	}

	locked = false;

	selectNodes(nodes) {
	this.locked = true;

	this.nodes = nodes.slice();
	this.taskQueue.flushMicroTaskQueue();

	this.locked = false;
	}
	}