javascript - jsfiddle error {"error": "Please use POST request"} when submitting a form -

i'm new using js fiddle , keep getting error: {"error": "please use post request"} when submitting form. understand cannot submit post request in jsfiddle, how can append form?

<form>   <label>add</label>   <input type="text"/> </form>    $('form').on("submit", function(){   $('form').after("apple") }); 

if not explicitly set form method browsers default using get.

<form method="post">