.prettierrc.js

module.exports = {
  // Include parentheses around a sole arrow function parameter. (default: "avoid")
  arrowParens: 'always',

  // By default, Prettier preserves a flavor of line endings a given file has already used. It also converts mixed line endings within one file to what it finds at the end of the first line.
  // Valid options: "auto", "lf", "crlf", "cr" (default: "auto")
  endOfLine: 'lf',

  // Print semicolons at the ends of statements. (default: true)
  semi: true,

  // Use single quotes instead of double quotes. (default: false)
  singleQuote: true,

  // Print trailing commas wherever possible when multi-line. (default: "none")
  trailingComma: 'es5',
};