prettier.config.js

// The values provided below are the defaults.
// If you don't specify one of these properties, 
// the default value will be applied. 
module.exports = {
  printWidth: 80, 
  tabWidth: 2,    
  useTabs: true,  
  semi: true,
  singleQuote: false,
  trailingComma: 'none', // other options `es5` or `all`
  bracketSpacing: true,
  arrowParens: 'avoid',  // other option 'always'
  parser: 'typescript',
};