I am using react.js for Single Page Applications. routing codes are inside the src --> routes.js I have referred many pages for this one of the pages is https://blog.logrocket.com/adding-dynamic-meta-tags-react-app-without-ssr/ but I don't know where to implement this. I have done exactly what they mentioned but normally we are using "npm start" to run the front-end. even after doing " npm run server" it's showing listening on port 3000. but meta tag values are still like this "title_" .
please refer to any ideology to implement this.