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Button formNoValidate 属性
tryjsref_pushbutton_formnovalidate
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<!DOCTYPE html> <html> <body> <form action="/action_page.php" method="get"> E-mail: <input type="email" name="userid"><br> <button id="myBtn" type="submit" formnovalidate>Submit</button> </form> <p>Click the "Try it" button to find out if the form-data should be validated or not, on submission.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myBtn").formNoValidate; document.getElementById("demo").innerHTML = x; } </script> </body> </html>