RewriteEngine On 
# If an existing asset or directory is requested go to it as it is 
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI} -f [OR] 
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI} -d 
RewriteRule ^ - [L] 
 
# If the requested resource doesn't exist, use index.html 
RewriteRule ^ index.html