Optimal .htaccess configuration for an Angular 7, Angular 6, Angular 5 (and older app) in production.

.htaccess

# INSTRUCTION:
# There are two options for the redirection:
# Option 1) (default): Your app is directly on the root of the domain.
# Option 2): Your app is placed in a subfolder from the root of the domain.
#
# If you have issues with browser caching you can uncomment the BROWSER CACHING part

# For new versions of this Gist go to:
# https://gist.github.com/julianpoemp/bcf277cb56d2420cc53ec630a04a3566

#------------ REDIRECTION option 1)
# use this if your app directly on the root of the domain,
# e.g. http://example_domain.com/index.html
<IfModule mod_rewrite.c>
    RewriteEngine on
    RewriteCond %{REQUEST_FILENAME} -s [OR]
    RewriteCond %{REQUEST_FILENAME} -l [OR]
    RewriteCond %{REQUEST_FILENAME} -d
    RewriteRule ^.*$ - [NC,L]
    RewriteRule ^(.*) index.html [NC,L]
</IfModule>
#------------

#------------ REDIRECTION option 2)
# Use this if your app is not directly on the root of the domain,
# e.g. http://example_domain.com/directory_path/index.html
# Important: replace directory_path with the relative path from
# the domain to the index.html. Keep the first "/". Don't forget to comment option 1).
#<IfModule mod_rewrite.c>
#    RewriteEngine on
#    RewriteCond %{REQUEST_FILENAME} -s [OR]
#    RewriteCond %{REQUEST_FILENAME} -l [OR]
#    RewriteCond %{REQUEST_FILENAME} -d
#    RewriteRule ^.*$ - [NC,L]
#    RewriteRule ^(.*) /directory_path/index.html [NC,L]
#</IfModule>
#------------

# #------------ BROWSER CACHING
# disable browser caching in production.
#<FilesMatch "\.(html|htm|js|json|css)$">
#	<IfModule mod_headers.c>
#		FileETag None
#		Header unset ETag
#		Header unset Pragma
#		Header unset Cache-Control
#		Header unset Last-Modified
#		Header set Pragma "no-cache"
#		Header set Cache-Control "max-age=0, no-cache, no-store, must-revalidate"
#		Header set Expires "Mon, 10 Apr 1972 00:00:00 GMT"
#	</IfModule>
#</FilesMatch>
#
# It is recommended to add these tags to your index.html, too:
# <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate">
# <meta http-equiv="Pragma" content="no-cache">
# <meta http-equiv="Expires" content="0">
#------------