## JavaScript

1. [no-var](https://eslint.org/docs/rules/no-var) 
2. [prefer-const](https://eslint.org/docs/rules/prefer-const)
3. [guard-for-in](https://eslint.org/docs/rules/guard-for-in): Simply use `Object.keys` instead. And `for...of` for iterating over the values of an object.

- [x] Some of these are likely already included with eslint's recommended rule-set. Check. (A) No, they aren't. See [here](https://github.com/eslint/eslint/blob/main/conf/eslint-recommended.js)
- [ ] How to list all used eslint rules
- [ ] Explain the problem with `var` (variable can be accessed and changed outside of block, show what issues it can cause)

## TypeScript

1. [strict-boolean-expressions](https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/eslint-plugin/docs/rules/strict-boolean-expressions.md)