Most developers know HTML bold and italic tags. But what happens when your text lands in an environment that strips all HTML — WhatsApp, Discord DMs, plain text emails, or Instagram captions? The answer: Unicode mathematical characters. Why Unicode Styling Works Everywhere Unicode includes dedicated ranges for bold, italic, bold-italic, and styled variants of Latin letters. These are not formatting instructions — they are different characters that happen to look styled. Regular: Hello World Bold: 𝗛𝗲𝗹𝗹𝗼 𝗪𝗼𝗿𝗹𝗱 Italic: 𝘏𝘦𝘭𝘭𝘰 𝘞𝘰𝘳𝘭𝘥 Strike: H̶e̶l̶l̶o̶ ̶W̶o̶r̶l̶d̶ Enter fullscreen mode Exit fullscreen mode Because they are actual characters, they survive: Copy-paste into any app Plain text environments WhatsApp, Discord, Instagram, Telegram SMS on modern phones LinkedIn posts (which strip HTML completely) The Unicode Ranges Mathematical Bold — starts at U+1D400 // Offset for bold lowercase 'a' = U+1D41A const BOLD_OFFSET_LOWER = 0x1D41A - ' a ' .…