Check out example codes for "make so only certain ip's can accesss html file". It will help you in understanding the concepts better.
Code Example 1
# ALLOW ONLY MULTIPLE IPs
<Limit GET POST PUT>
Order Deny,Allow
Deny from all
Allow from 123.456.789
Allow from 456.789.123
Allow from 789.123.456
</Limit>
ErrorDocument 403 path/custom-message.html
<Files path/custom-message.html>
Order Allow,Deny
Allow from all
</Files>
Learn ReactJs, React Native from akashmittal.com