Check for duplicates in the stream and filter them or throw an error
npm install @fomantic/gulp-dedupesh
npm install gulp-dedupe --save-dev
`
Example:
`js
var dedupe = require('gulp-dedupe');
...
.pipe(dedupe()) // Remove duplicates from previous tasks (if any).
.pipe(concat('bundle.css')) // For example, we need to concat the result without duplicates.
.pipe(gulp.dest('./build'));
`
dedupe(options) optionally accepts options object. The following options are
available:
+ error to emit an error in case of duplicate (false by default).
+ same to emit an error in case duplicates have different contents (true by
default).
+ diff to supply duplicates with different contents error from previous option
with actual diff (false` by default).