unique-concat
Concatenates two arrays, removing duplicates in the process and returns one array with unique values.
inspectpack
An inspection tool for Webpack frontend JavaScript bundles.
mergician
Uniquely flexible and light-weight utility for cloning and deep (recursive) merging of JavaScript objects. Supports descriptor values, accessor functions, and custom prototypes. Provides advanced options for customizing the clone/merge process.
dedupe
easy deduplication of array values
gulp-dedupe
Check for duplicates in the stream and filter them or throw an error