<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body>
<script src="http://yui.yahooapis.com/3.16.0/build/yui/yui-min.js"></script>
<script type="text/javascript">
YUI.add(‘electron‘, function(Y) {
var REST_ENERGY = 511.00;
Y.Electron = Y.Base.create(‘electron‘, Y.Base, [], {
initializer: function() {
Y.log(‘init...‘);
},
getSpeed: function() {
var e_ratio = REST_ENERGY / this.get(‘energy‘);
return Math.sqrt(1 - e_ratio * e_ratio);
}
},ATTRS = {
charge: {
value: -1,
readOnly: true
},
energy: {
value: REST_ENERGY,
validator: function(en) {
return (en >= REST_ENERGY);
}
}
});
}, ‘0.0.1‘, {requires: [‘base-build‘]});
YUI().use(‘electron‘, function(Y) {
var e1 = new Y.Electron();
e1.set(‘energy‘, 8000);
Y.log(e1.getSpeed());
});
</script>
</body>
</html>
YUI3 Y.Base.create,布布扣,bubuko.com
原文：http://www.cnblogs.com/weats/p/3786041.html