Формы в HTML. Несколько кнопок отправки в HTML-форме
Attribute contains a DOMString which is displayed as the button"s label. Buttons do not have a true value otherwise.
If you don"t specify a value , the button will have a default label, chosen by the user agent. This label is likely to be something along the lines of "Submit" or "Submit Query." Here"s an example of a submit button with a default label in your browser:
Additional attributes
formenctype
A string that identifies the encoding method to use when submitting the form data to the server. There are three permitted values:
Application/x-www-form-urlencoded This, the default value, sends the form data as a string after URL encoding the text using an algorithm such as . multipart/form-data Uses the FormData API to manage the data, allowing for files to be submitted to the server. You must use this encoding type if your form includes any element is used to create interactive controls for web-based forms in order to accept data from the user; a wide variety of types of input data and control widgets are available, depending on the device and user agent."> elements of type file (). text/plain Plain text; mostly useful only for debugging, so you can easily see the data that"s to be submitted.
If specified, the value of the formenctype attribute overrides the owning form"s action attribute.
formmethod
A string indicating the HTTP method to use when submitting the form"s data; this value overrides any method attribute given on the owning form. Permitted values are:
Get A URL is constructed by starting with the URL given by the formaction or action attribute, appending a question mark ("?") character, then appending the form"s data, encoded as described by formenctype or the form"s enctype attribute. This URL is then sent to the server using an HTTP request. This method works well for simple forms that contain only ASCII characters and have no side effects. This is the default value. post The form"s data is included in the body of the request that is sent to the URL given by the formaction or action attribute using an HTTP post request. This method supports complex data and file attachments. dialog This method is used to indicate that the button simply closes the dialog with which the input is associated, and does not transmit the form data at all.
formnovalidate
A Boolean attribute which, if present, specifies that the form should not be validated before submission to the server. This overrides the value of the novalidate attribute on the element"s owning form.
formtarget
A string which specifies a name or keyword that indicates where to display the response received after submitting the form. The string must be the name of a browsing context (that is, a tab, window, or ) represents a nested browsing context, embedding another HTML page into the current one.">