Synchronize files and folders locally by glob patterns, watch option included.

npm i -D copy-and-watch

copy-and-watch [options] <sources> <target>

options:
  --watch - enable file watcher
  --clean - clean target folder on start
  --skip-initial-copy - skip copying files initially, only copy if they change. Must be used with `--watch` argument.

You may have some build script in your package.json involving mirroring folders (let's say, static assets), that's a good use-case for copy-and-watch:

{
  "devDependencies": {
    "copy-and-watch": "latest"
  },
  "scripts": {
    "build": "copy-and-watch src/**/*.{html,json} src/**/fonts/* dist/",
    "watch": "copy-and-watch --watch src/**/*.{html,json} src/**/{fonts,images}/* dist/"
  }
}

• Check file existence before removal (by mt3o)

• Added support for —skip-initial-copy argument (by mugli)

• Fixed copy on dir bug (by arnarthor)