Recently, I used jQuery to get the data from the server client via $.ajax method. As we known that, we should send the request with some parameters. The code as follow.
$(document).ready(function(){ $.ajax({ url:'http://127.0.0.1/jq-undefined.php', data:{ para1 : 1, para2 : 2, para3 : undefined }, success:function(data){ alert(data); }, }); }); According to Chrome DevTools, I get the result:
Yep, jQuery is smart, it can ignore the undefined values and avoid a lot of server errors.
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