Input Submit formEnctype Property

Find out how form-data should be encoded before submitting it to a server:

var x = document.getElementById("mySubmit").formEnctype;

The result of x could be:

text/plain

Definition and Usage

The formEnctype property sets or returns the value of the formenctype attribute of a submit button.

The formenctype attribute specifies how form-data should be encoded when submitting it to the server (only for forms with method="post").

The formenctype attribute overrides the enctype attribute of the <form> element.

Note: The formenctype attribute is new for the <input> element with type="submit" in HTML5.

The formEnctype property is supported in all major browsers.

Note: The formEnctype property is not supported in Internet Explorer 9 and earlier versions.

Return the formEnctype property:

submitObject.formEnctype

Set the formEnctype property:

submitObject.formEnctype="application/x-www-form-urlencoded,multipart/form-data,text/plain"

Value	Description
application/x-www-form-urlencoded	Default. All characters are encoded before sent (spaces are converted to "+" symbols, and special characters are converted to ASCII HEX values)
multipart/form-data	No characters are encoded. This value is required when you are using forms that have a file upload control
text/plain	Spaces are converted to "+" symbols, but no special characters are encoded

Return Value:	A String, representing the type of content that is used to submit the form to the server

Change the value of the formenctype attribute of a submit button to "application/x-www-form-urlencoded":

document.getElementById("mySubmit").formEnctype = "application/x-www-form-urlencoded";