score:3

Accepted answer

$s is inferred from the "title" prop of your component.

here is a link to the relevant source code:

https://github.com/nfl/react-helmet/blob/b79d30ff44c7ff3c175c31059076e5e549a1b402/src/helmetutils.js#l27

score:0

the pattern %s is used to be replaced for string:

const str = 'world';
console.log('hello %s!', str);


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