If you get a “referenceError wx is not defined” error like I did, there is a good chance that jweixin-1.0.0.js conflicts with one of your other js.
Solutions:
<script type="text/javascript">
define = null;
require = null;
</script>
<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js" type="text/javascript">
</script>
Copy the code
Before referencing jweixin-1.0.0.js, reset define and require.