Question 1

How do I parse CSS with CSS Parser in Node.js?

Accepted Answer

Install via npm as the 'parserlib' package, then create a parser instance and call parse() with your CSS string. The README provides code examples for Node.js usage, including handling events for parsed constructs.

Question 2

CSS Parser vs PostCSS: which one should I use for a linter?

Accepted Answer

CSS Parser is lower-level and event-driven, ideal if you need granular control and browser-like error recovery. PostCSS offers a plugin ecosystem and AST, better for transformations but may be heavier. Choose based on whether you prioritize custom tooling or pre-built functionality.

Question 3

Does CSS Parser support CSS custom properties (variables)?

Accepted Answer

It's a CSS3 parser, so support for custom properties is not explicitly mentioned in the README. You might need to test or extend it, as newer CSS features may not be fully validated or parsed.

Question 4

How can I build an abstract syntax tree from CSS Parser events?

Accepted Answer

You must listen to events like 'startrule' and 'property' to accumulate data into your own tree structure. The README details event objects with syntax units, but no built-in AST is provided, requiring manual implementation.

Question 5

What's the difference between error recovery and strict mode in CSS Parser?

Accepted Answer

In default mode, it recovers from errors by skipping invalid parts and fires 'error' events. In strict mode (enabled via options), parsing stops on the first syntax error, useful for debugging or strict validation.

Question 6

Is CSS Parser still maintained and updated?

Accepted Answer

The README shows Travis CI for builds, but no recent activity is mentioned. It may be stable but potentially outdated for modern CSS features, so check the GitHub repository for latest updates and issues.

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