U+200D "‍" Zero Width Joiner Unicode Character

U+200D "‍" Zero Width Joiner is an invisible formatting code used in digital text to instruct two adjacent characters to be rendered as a single connected glyph, rather than as separate symbols. This is crucial for complex scripts like Arabic and many South Asian languages, where letters must form continuous cursive shapes or conjuncts. Furthermore, the Zero Width Joiner enables emoji sequences, such as creating a family emoji from separate person and child characters, and it allows for the display of diverse skin tones and gender variants within a single emoji by joining base figures with appropriate modifiers.