Four core questions
TypeScript first pass
Practice explaining what the checker catches and what JavaScript still needs to check at runtime.
Open the full lessonPreparation options
Already comfortable with JavaScript functions and objects? Start with a question. If TypeScript is new, start with its free worked explanation. Close it and try explaining a changed example.
The Premium lesson walkthrough includes the complete local compiler fixture. That manual exercise is not run or counted here.
Need a JavaScript refresher? Review defining and calling functions or object properties. Return when you can write a small function and read two object properties.
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All four questions
Question 1 of 4
TypeScript vs JavaScript
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Optional follow-through
The advanced question and reference stay available. Neither adds to the four-question count or changes your existing lesson mark.