How can I get a key in a JavaScript ‘Map’ by its value?

I have a JavaScript 'Map' like this one

let people = new Map();
people.set('1', 'jhon');
people.set('2', 'jasmein');
people.set('3', 'abdo');

I want some method to return a key by its value.

let jhonKey = people.getKey('jhon'); // jhonKey should be '1'

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