Basic Template

.editorconfig

root = true

[*]
charset = utf-8
insert_final_newline = true
trim_trailing_whitespace = true
end_of_line = lf
indent_style = space
indent_size = 2

.eslintrc.js

module.exports = {
  root: true,
  parserOptions: {
    ecmaVersion: 2018,
  },
  env: {
    browser: true,
  },
  extends: ["airbnb-base", "plugin:prettier/recommended"],
  reportUnusedDisableDirectives: true,
};

.prettierrc.json

{
  "printWidth": 80,
  "tabWidth": 2,
  "semi": true,
  "singleQuote": true,
  "trailingComma": "es5"
}

package.json

{
  "name": "new-project",
  "version": "0.0.0",
  "description": "My New Project",
  "keywords": [],
  "scripts": {
    "lint": "eslint --ignore-path .gitignore . --ext .js,.ts",
    "pretest": "npm run lint",
    "test": "npm run test:only",
    "test:only": "mocha"
  },
  "dependencies": {},
  "devDependencies": {
    "chai": "^4.2.0",
    "eslint": "^7.11.0",
    "eslint-config-airbnb-base": "^14.2.0",
    "eslint-config-prettier": "^6.12.0",
    "eslint-plugin-prettier": "^3.1.4",
    "mocha": "^8.1.3",
    "prettier": "^2.1.2"
  }
}