node-gulp-tap - 2.0.0-3 main

Some filters like gulp-coffee process all files. What if you want to process
all JS and Coffee files in a single pipeline? Use tap to filter out .coffee
files and process them through the coffee filter and let JavaScript files
pass through.
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If you do not return a stream, tap forwards your changes.
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Node.js is an event-based server-side JavaScript engine.