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react refresh 404 error

#paste this in nginx conf file
location / {
  if (!-e $request_filename){
    rewrite ^(.*)$ /index.html break;
  }
}

on refresh react url not working or 404 page not showing react

RewriteBase /
RewriteRule ^index.html$ - [L]
 RewriteCond %{REQUEST_FILENAME} !-f
 RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.html [L]

//include this in .htaccess in root directory

HOW TO AVOID 404 ERROR WHEN RELOAD A PAGE IN REACT?-REACTJS

location / {
  if (!-e $request_filename){
    rewrite ^(.*)$ /index.html break;
  }
}