Word Break - Glue after zero width joiner

Glue after zero width joiner is a specific value that defines how a word break behaves when a character follows a zero width joiner (ZWJ). In this context, the “glue” value prevents any line or word break between the ZWJ and the character that comes right after it, effectively binding them together as a single unit. This is crucial for scripts and languages that rely on ZWJ to form ligatures or conjunct characters, such as in Arabic or Indic text, where breaking between the joiner and the next glyph would visually corrupt the intended shape or meaning. The glue ensures that the sequence remains intact during text wrapping and processing, maintaining the proper rendering of complex script clusters without unwanted separations.