blackstuend/html_problem.md

## html_problem.md

      
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              html_problem.md
            
          
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Form submit return false fail if use async

<!DOCTYPE html>
<html>
<head>
    <meta charset='UTF-8'>
</head>
<body>
    <form action='/user' method ='get' id='form'>
        <input width='10px'>
        <button type=submit>傳送</button>
    </form>
    <script>
        var form = document.querySelector('form')
        window.onload=async function(){  
            form.onsubmit=function(){
                return false
            }
        }
    </script>
</body>
</html>


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