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並前往https://poopcode.com/how-to-get-a-key-in-a-javascript-object-by-its-value/

How to get a key in a JavaScript object by its value? - Poopcode

let key = Object.keys(obj).find(key => obj[key] == 'B'); console.log(key); //Second. Curly hair, very fair, please share.

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