Sorry im beginner and i read golang.docs but didnt understand well. i`ve : index.html:
<html>
<head>
</head>
<body>
<form action type="checkbox" name="test" value="A" {{.checked}}>
<input type="submit" value="save">
</body>
</html>
in main.go if user click save button then check checkbox redirect that page and show checkbox checked