Opera Presto has experimental support for HTML5 Forms which is a work in progress. HTML5 Forms replaces the separate Web Forms 2.0 specification which has been integrated into the HTML5 specification.
Opera Presto offers support for HTML5 Forms as described in the following data table.
| <elements> / attributes / "values" | Support |
|---|---|
<form>
|
Yes |
accept-charset
|
Yes |
action
|
Yes |
enctype
|
Yes |
method
|
Yes |
name
|
Yes |
novalidate
|
Yes |
target
|
Yes |
<fieldset>
|
Yes |
disabled
|
Yes |
form
|
Yes |
name
|
Yes |
<label>
|
Yes |
form
|
Yes |
for
|
Yes |
<input>
|
Yes |
accept
|
No |
formaction
|
Yes |
alt
|
Yes |
autocomplete
|
Yes |
autofocus
|
Yes |
checked
|
Yes |
disabled
|
Yes |
formenctype
|
Yes |
form
|
Yes |
height
|
Yes |
list
|
Yes |
max
|
Yes |
maxlength
|
Yes |
formmethod
|
Yes |
min
|
Yes |
multiple
|
Yes |
name
|
Yes |
formnovalidate
|
Yes |
pattern
|
Yes |
placeholder
|
Yes |
readonly
|
Yes |
required
|
Yes |
size
|
Yes |
src
|
Yes |
step
|
Yes |
formtarget
|
Yes |
type
|
Yes |
"button"
|
Yes |
"checkbox"
|
Yes |
"color"
|
Yes |
"date"
|
Yes |
"datetime"
|
Yes |
"datetime-local"
|
Yes |
"email"
|
Yes |
"file"
|
Yes |
"hidden"
|
Yes |
"image"
|
Yes |
"month"
|
Yes |
"number"
|
Yes |
"password"
|
Yes |
"radio"
|
Yes |
"range"
|
Yes |
"reset"
|
Yes |
"search"
|
Yes |
"submit"
|
Yes |
"tel"
|
Yes |
"text" (default value)
|
Yes |
"time"
|
Yes |
"url"
|
Yes |
"week"
|
Yes |
<button>
|
Yes |
formaction
|
Yes |
autofocus
|
Yes |
disabled
|
Yes |
formenctype
|
Yes |
form
|
Yes |
formmethod
|
Yes |
name
|
Yes |
formnovalidate
|
Yes |
formtarget
|
Yes |
type
|
Yes |
"button"
|
Yes |
"reset"
|
Yes |
"submit"
|
Yes |
value
|
Yes |
<select>
|
Yes |
autofocus
|
Yes |
disabled
|
Yes |
form
|
Yes |
multiple
|
Yes |
name
|
Yes |
required
|
No |
size (Note: The Opera Presto default value = "1", not "0".)
|
Partial |
<datalist>
|
Yes |
<optgroup>
|
Yes |
disabled
|
Yes |
label
|
Yes |
<option>
|
Yes |
disabled
|
Yes |
label
|
Yes |
selected
|
Yes |
value
|
Yes |
<textarea>
|
Yes |
autofocus
|
Yes |
cols
|
Yes |
disabled
|
Yes |
form
|
Yes |
maxlength
|
Yes |
name
|
Yes |
readonly
|
Yes |
required
|
Yes |
rows
|
Yes |
wrap
|
Yes |
<output>
|
Yes |
for
|
Yes |
form
|
Yes |
name
|
Yes |
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