Unibeautify/beautifier-tslint

import { BeautifierOptions } from "unibeautify";

const options: BeautifierOptions = {
  TypeScript: {
    "arrow-parens": [
      ["arrow_parens"],
      (options): boolean | undefined => {
        switch (options.arrow_parens) {
          case "always":
            return true;
          default:
            return false;
        }
      },
    ],
    "trailing-comma": [
      ["end_with_comma"],
      (options): any => {
        switch (options.end_with_comma) {
          case true:
            return {
              ruleArguments: [{ singleline: "always", multiline: "always" }],
            };
          default:
            return false;
        }
      },
    ],
  },
};

export default options;