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// The Polymer element. | |
<link rel="import" href="../components/polymer/polymer.html"> | |
<polymer-element name="my-element"> | |
<template> | |
<template if="{{!showAnswer}}"> | |
<div id="question">What is the answer to "The Ultimate Question of Life, the Universe, and Everything"? | |
</div> | |
<div id="show" on-click="{{enableShowAnswer}}">Show</div> | |
</template> | |
<template if="{{showAnswer}}"> | |
<div id="answer">42</div> | |
</template> | |
</template> | |
<script> | |
Polymer('my-element', { | |
showAnswer: false, | |
enableShowAnswer: function(e, detail, sender) { | |
e.preventDefault(); | |
this.showAnswer = true; | |
} | |
}); | |
</script> | |
</polymer-element> | |
// The test. | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<title>binding to a model</title> | |
<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes"> | |
<script src="../components/platform/platform.js"></script> | |
<link rel="import" href="../components/polymer-test-tools/tools.html"> | |
<script src="../components/polymer-test-tools/htmltest.js"></script> | |
<link rel="import" href="../snippets/conditionally_rendering_a_template.html"> | |
</head> | |
<body> | |
<my-element></my-element> | |
<script> | |
document.addEventListener('polymer-ready', function() { | |
var el = document.querySelector('my-element'); | |
assert.isFalse(el.showAnswer); | |
assert.isDefined(el.$.question); | |
assert.isUndefined(el.$.answer); | |
el.$.show.dispatchEvent(new Event('click')); | |
setTimeout(function() { | |
assert.isTrue(el.showAnswer); // PASSES | |
assert.isUndefined(el.$.question); // FAILS. Should pass. | |
assert.isDefined(el.$.answer); // FAILS. Should pass. | |
done(); | |
}, 0); | |
}); | |
</script> | |
</body> | |
</html> |
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