Button formMethod Property
Example
Return which HTTP method to use when sending the form-data:
var x = document.getElementById("myBtn").formMethod;
The result of x could be:
post
Try it yourself »
Definition and Usage
The formMethod property sets or returns the value of the formmethod attribute of a button.
The formmethod attribute specifies which HTTP method to use when sending the form-data. This attribute overrides the form's method attribute.
The formmethod attribute is only used for buttons with type="submit".
The form-data can be sent as URL variables (with method="get") or as HTTP post (with method="post").
Notes on the "get" method:
- it appends the form-data to the URL in name/value pairs
- it is useful for form submissions where a user want to bookmark the result
- There is a limit to how much data you can place in a URL (varies between browsers), therefore, you cannot be sure that all of the form-data will be correctly transferred
- Never use the "get" method to pass sensitive information! (password or other sensitive information will be visible in the browser's address bar)
Notes on the "post" method:
- it sends the form-data as an HTTP post transaction
- Form submissions with the "post" method cannot be bookmarked
- it is more robust and secure than "get"
- it does not have size limitations
Note: The formmethod attribute is new for the <button> element in HTML5.
Browser Support
The formMethod property is supported in all major browsers.
Note: The formMethod property is not supported in Internet Explorer 9 and earlier versions.
Syntax
Return the formMethod property:
buttonObject.formMethod
Set the formMethod property:
buttonObject.formMethod=get|post
Property Values
| Value | Description |
|---|---|
| get | Appends the form-data to the URL: URL?name=value&name=value |
| post | Sends the form-data as an HTTP post transaction |
Technical Details
| Return Value: | A String, representing the HTTP method that is used to submit the form to the server |
|---|
More Examples
Example
Change the method for sending form-data:
document.getElementById("myBtn").formMethod = "post";
Try it yourself »
Example
Another example on returning the formMethod property:
var x = document.getElementById("myBtn").formMethod;
Try it yourself »
Related Pages
HTML reference: HTML <button> formmethod attribute
Button Object
