SMRTR ProgrammingMay 21, 2025Daily.dev

How JavaScript Lint Rules Work (and Why Abstract Syntax Trees Matter)

SMRTR summary

Linters analyze code to flag errors, enforce style rules, and catch potential bugs by converting code into Abstract Syntax Trees (ASTs). Lint rules examine patterns in these ASTs to identify issues. Understanding ASTs enables developers to write custom lint rules, debug linter behavior, and contribute to existing tools. This knowledge helps enforce coding standards and best practices more effectively.

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