Optional ReadonlyexpiresExpiry as Unix milliseconds or a Date; the server's default applies when left out.
Optional ReadonlymaxMost selected options; the server's default 1 when left out. At least 1, at least
minValues and at most the number of options.
Optional ReadonlyminFewest selected options; the server's default 1 when left out.
Optional ReadonlyplaceholderOptional display text.
Optional ReadonlyrequiredA capability the person needs, for example approve_actions.
Optional Readonlyrestrictedany, run_starter or owner (09 11.2).
Optional ReadonlysettingsSource of the limits (default DEFAULTS).
Optional ReadonlysingleWhether using it disables the other single-use components of the message (09 11.3); the server's default applies when left out.
Options of select.