The events which the browser itself creates (for a user action, or for something like element.click()) have these
options. A script which creates an event with the constructor gets none of them (everything is false) unless it asks
for them, which is why createEvent only uses this table when it is told the browser is creating the event.
The values follow the UI Events, HTML, Pointer Events, Clipboard, Drag and Drop, Touch and CSS specifications.
The events which the browser itself creates (for a user action, or for something like element.click()) have these options. A script which creates an event with the constructor gets none of them (everything is false) unless it asks for them, which is why createEvent only uses this table when it is told the browser is creating the event. The values follow the UI Events, HTML, Pointer Events, Clipboard, Drag and Drop, Touch and CSS specifications.