export interface WordUnit {
    /** The visible word, with the punctuation that clings to it. */
    text: string;
    /** Whitespace after it, rendered outside the animated element. */
    ws: string;
}
/**
 * Splits text into the units a stream reveals one at a time. Words come from
 * `Intl.Segmenter` (so Chinese splits into words, not characters); whitespace
 * rides on the word before it so layout never waits on a bare space; closing
 * punctuation (`，` `.` `”` `)`) stays with the word it follows and opening
 * punctuation (`“` `(` `《`) with the word it precedes, so a line never starts
 * or ends on a lone mark; anything else that is not a word, such as an emoji,
 * is a unit of its own.
 */
export declare function segmentWords(text: string, locale?: string): WordUnit[];