Interface NormalizeOptions

Defines what character spaces (codepoints U+0020 and U+00A0 after compatibility normalization) are converted to. By default, this is - (dash). To preserve spaces as is, set this to (note that non-breaking spaces will be converted to normal spaces). Set to an empty string or null to remove all spaces entirely. Note that all other spacing characters (including newlines, tabs, etc) are removed.

Keep emoji characters. Default value: false. This has no effect in basic mode, as that doesn't remove characters..

Lowercase the output string. Default value: false

Mode of operation:

• "basic" removes diacritics only from letters
• "alphabetic" removes all characters that are not alphabetic (in all scripts)
• "latin" removes all characters that are not in the latin alphabet

Additional characters to preserve. By default, this is -_. (dash, underscore and dot). This is ignored when in basic mode.

Remove numbers. Default value: false. This has no effect in basic mode, as that never removes numbers.