React JS 19 tutorial in Hindi 2026 - React Interview Question answers in Hindi #1 why react component start with an uppercase letter

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React js Latest Playlist in hindi : https://www.youtube.com/playlist?list=PL8p2I9GklV47BCAjiCtuV_liN9IwAl8pM eact requires that the first letter of components be capitalized. JSX will use this capitalization to tell the difference between an HTML tag and a component instance. If the first letter of a name is capitalized, then JSX knows it's a component instance; if not, then it's an HTML element. inst id: @code.steps