yarn add --dev eslint @typescript-eslint/parser @typescript-eslint/eslint-plugin
yarn add --dev prettier eslint-config-prettier eslint-plugin-prettier
'prettier/prettier': [
'error',
{
printWidth: 100,
singleQuote: true,
semi: true,
useTabs: true,
tabWidth: 2,
trailingComma: 'all',
bracketSpacing: true,
arrowParens: 'avoid',
},
],
npx tsc -w src/chapter-11/index.ts