Unsupported Attributes

The following global attributes are unsupported.

• accesskey
• aria*
• autocapitalize
• contenteditable
• contextmenu
• dir
• dropzone
• hidden
• inputmode
• is
• item*
• part
• spellcheck
• tabindex (supported, but does not match the specification. Negative values are not focused, and positive values will allow focus, but tab order cannot be specified.)
• translate

Along with the above items, most event handlers should be attached using addEventListener instead of their on* counterparts.