How to configure package.json to run eslint script
eslint "**/*.js"
to run on all js files in all the folders recursively (in the current folder)
You can also do: AnyFolder/**/*.js
And to ignore a folder: eslint "**/*.js" --ignore-pattern node_modules/
Know more at eslint/command-line-interface
eslint . --ext .js
to lint files with the .js extension.
The .
targets files in the current directory and all subdirectories.
To include other file extensions,
eslint . --ext .js,.jsx
or eslint . --ext .js --ext .jsx
.
The eslint documentation covers this option.