Unless you are the maintainer of lvh.me, you can not be sure it will not disappear or change its RRs for lvh.me. You can use localhost.localdomain instead of localhost, by adding the following lines in your hosts file: 127.0.0.1 localhost localhost.localdomain ::1 localhost localhost.localdomain This is better than using lvh.me because: you may not always have access to a DNS resolver, when developing

If you rely on any external dependencies (files required in a preprocessor for example) you might want to watch these files for changes and re-run svelte compile. Webpack allows loader dependencies to trigger a recompile. svelte-loader exposes this API via options.externalDependencies.