If you want to view files quickly while developing locally, then there are a number of built-in servers in various languages. Change to the directory with your files and then run:
Node (using http-server)
http-server
# or now
npx http-server
Note: this one is slightly different since this is a static server - only HTML, JS and CSS will be run.
Python 3
python -m http.server
PHP
php -S localhost:8000 // where 8000 is the port number