Mobx autorun example

Shows mobx.reaction author(s): Matt Ruby

HTML

<div id="react-log"></div>

<script src="https://cdn.jsdelivr.net/g/[email protected](react.min.js+react-dom.min.js),[email protected]"></script>
<script src="https://npmcdn.com/[email protected]/lib/mobx.umd.min.js"></script>
<script src="https://npmcdn.com/mobx-react"></script>
<script src="https://rawgit.com/mattruby/mobx-examples/master/logging-utils.js"></script>
<script>
	wrapConsole();
</script>

JavaScript

var person = mobx.observable({
	firstName: 'Matt',
	lastName: 'Ruby',
	age: 0
});

// note that this will not fire initially, only on change.
// so you will not see the age 0 run first unlike autorun.
mobx.reaction(function () {
	return person.firstName + ' ' + person.age;
}, function (fnameAndAge) {
	console.log(fnameAndAge + ' ' + person.lastName);
});

// this will print Matt NN 10 times
_.times(10, function () {
	person.age = _.random(40);
});

// this will print nothing
_.times(10, function () {
	person.lastName = _.random(40);
});