W3Schools Tryit Editor

<!DOCTYPE html>
<html>
<body>

<p>This example contains a form with two submit buttons. The first submit button submits the form data with default character encoding, and the second submits the form data without character encoding:</p>

<form action="/action_page_binary.asp" method="post">
  Name: <input type="text" name="fname" value="Ståle Refsnes"><br>
  <button type="submit">Submit with character encoding</button>
  <button id="myBtn" type="submit" formenctype="text/plain">Submit without character encoding</button>
</form>

<p>If you click on the submit buttons above, notice that the formenctype attribute overrides the HTML form's enctype attribute (default is "application/x-www-form-urlencoded").</p>

<p>Click the "Try it" button to return the value of the formenctype attribute of the second submit button above.</p>

</body>
</html>

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<!DOCTYPE html><html><body>​<p>This example contains a form with two submit buttons. The first submit button submits the form data with default character encoding, and the second submits the form data without character encoding:</p>​<form action="/action_page_binary.asp" method="post">  Name: <input type="text" name="fname" value="Ståle Refsnes"><br>  <button type="submit">Submit with character encoding</button>  <button id="myBtn" type="submit" formenctype="text/plain">Submit without character encoding</button></form>​<p>If you click on the submit buttons above, notice that the formenctype attribute overrides the HTML form's enctype attribute (default is "application/x-www-form-urlencoded").</p>​<p>Click the "Try it" button to return the value of the formenctype attribute of the second submit button above.</p>​<button onclick="myFunction()">Try it</button>​<p id="demo"></p>​<script>function myFunction() {  var x = document.getElementById("myBtn").formEnctype;  document.getElementById("demo").innerHTML = x;}</script>​</body></html>​