I created custom element in polymer 0.8 but not working blank screen shown i tested it on Google-Chrome, Firefox and Opera. All browsers are updated. Here is code:
index.html
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Polymer 0.8 Test</title>
<link rel="import" href="bower_components/webcomponentsjs/webcomponents-lite.js" >
<link rel="import" href="my-element.html">
</head>
<body>
<my-element></my-element>
</body>
</html>
and "my-element.html"
<link rel="import" href="bower_components/polymer/polymer.html">
<dom-module id="my-element">
<template>
<div>Hello World With Polymer 0.8</div>
</template>
</dom-module>
<script>
Polymer({
is:"my-element"
})
</script>
Problem solved the problem was with xampp now its ok.