Question 1

How to exclude vendor files from minification in Gulp?

Accepted Answer

Use gulp-filter with a glob pattern like ['**', '!*src/vendor'] to filter out vendor files, pipe through minification plugins like uglify, and optionally restore them with the restore option to keep the original stream intact.

Question 2

gulp-filter vs gulp-if: which one should I use?

Accepted Answer

gulp-filter is better for temporarily isolating files and restoring them later, ideal for multi-stage processing. gulp-if is for conditional plugin execution without stream isolation. Choose based on whether you need the filtered files back in the pipeline.

Question 3

How to restore filtered files after processing?

Accepted Answer

Set the restore option to true when creating the filter instance, then call .restore on that instance in the pipeline. This brings back the previously filtered files, as demonstrated in the README's multiple filter example.

Question 4

Can I filter files using custom logic instead of globs?

Accepted Answer

Yes, pass a function as the pattern that takes a vinyl file object and returns a boolean. For example, filter(file => /unicorns/.test(file.path)) allows dynamic inclusion based on file content or metadata.

Question 5

What does the passthrough option do in gulp-filter?

Accepted Answer

When passthrough is true (default), filtered files are restored as a pass-through stream integrated into the main pipeline. If false, they become a standalone readable stream, useful for separate output destinations.

Question 6

Is gulp-filter compatible with Gulp 4?

Accepted Answer

Yes, gulp-filter works with Gulp 4 and the vinyl stream system, as it relies on standard Node.js transform streams. Always check the npm package for updates, but it's maintained for modern Gulp versions.

gulp-filter

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