Whether upper case or lower case should sort first.
Whether upper case or lower case should sort first. Possible values are "upper", "lower", or "false" (use the locale's default); the default is "false". This option can be set through an options property or through a Unicode extension key; if both are provided, the options property takes precedence. Implementations are not required to support this property.
Whether punctuation should be ignored.
Whether punctuation should be ignored. Possible values are true and false; the default is false.
The locale matching algorithm to use.
The locale matching algorithm to use. Possible values are "lookup" and "best fit"; the default is "best fit". For information about this option, see the Intl page.
Whether numeric collation should be used, such that "1" < "2" < "10".
Whether numeric collation should be used, such that "1" < "2" < "10". Possible values are true and false; the default is false. This option can be set through an options property or through a Unicode extension key; if both are provided, the options property takes precedence. Implementations are not required to support this property.
Which differences in the strings should lead to non-zero result values.
Which differences in the strings should lead to non-zero result values.
Possible values are:
Whether the comparison is for sorting or for searching for matching strings.
Whether the comparison is for sorting or for searching for matching strings. Possible values are "sort" and "search"; the default is "sort".