quick-lint-js

Find bugs in JavaScript programs.

E0257: missing ',', ';', or newline between object type entries

In TypeScript, properties in object types are separated by commas, semicolons, or newlines. It is a syntax error to write two properties without one of those separators in between:

type Status = { ok: boolean error?: string };

To fix this error, add a separator between the two properties:

type Status = { ok: boolean, error?: string };

Documentation for other errors