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Accurate Emoji Character Calculations
Standard Javascript string checking utilizes .length, which measures UTF-16 code units. This causes modern emojis (which are made of surrogate pairs) to count as 2 or more characters. This counter utilizes array formatting to ensure every visual character counts as 1.
Character Limits (2026 Reference):
Different social platforms enforce strict caps. Threads and Mastodon allow up to 500, Bluesky limits posts to 300, and X (Twitter) caps free accounts at 280. LinkedIn posts allow up to 3000, while Instagram limits descriptions to 2200 characters.