Typescript Stephen Grider
function isAddAction(action: CounterAction): action is AddAction return action.type === 'add';
This is the Grider difference. He doesn't teach syntax for the sake of syntax. He teaches . typescript stephen grider
As a developer, you're likely no stranger to JavaScript. But have you ever found yourself working on a large-scale project, only to realize that your codebase has become a tangled mess of callbacks and spaghetti code? If so, you're not alone. That's where TypeScript comes in - a superset of JavaScript that adds optional static typing and other features to improve the development experience. typescript stephen grider