Definition
EditContext API defines TextFormatInit
dictionary TextFormatInit {
    unsigned long rangeStart;
    unsigned long rangeEnd;
    UnderlineStyle underlineStyle;
    UnderlineThickness underlineThickness;
};TextFormatInit dictionaryEditContext API defines TextFormatInit
dictionary TextFormatInit {
    unsigned long rangeStart;
    unsigned long rangeEnd;
    UnderlineStyle underlineStyle;
    UnderlineThickness underlineThickness;
};