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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