Question: How did you build a JS/TS parser from scratch?

[TKharaishvili]

At the risk of sounding dumb I wanted to ask this question. How did you test your parser when building it? Is there an openly available set of tests you used to help guide you? How did you make sure to cover all corners of the grammar and cover them correctly?

[evanw]

JavaScript and TypeScript both have test coverage:

• JavaScript: https://github.com/tc39/test262
• TypeScript: https://github.com/microsoft/TypeScript/tree/main/tests

[TKharaishvili]

Thank you very much!