Build multiple app bundles with Gulp and Browserify (vendor bundle not included here)

gulpfile-fragment.js

const paths = {
    entries: {
        ts: [
            "Scripts/app.ts"
        ]
    },
    ...
};
    
/**
 * Build one or more app bundles that share a common vendor file.
 * 
 * @returns {MergedStream} Merged stream
 */
function app() {
    const tasks = paths.entries.ts.map(function (entry) {
        const browse = browserify({
            debug: true,
            entries: [entry]
        });

        return browse
            .plugin(tsify)
            .external(paths.input.files.vendors)
            .bundle()
            .pipe(source(entry))
            .pipe(rename({
                dirname: "",
                extname: ".js"
            }));
    });

    return es.merge.apply(null, tasks)
        .pipe(gulp.dest(paths.output.dirs.wwwscripts))
        .pipe(buffer())
        .pipe(terser())
        .pipe(rename({ suffix: '.min' }))
        .pipe(gulp.dest(paths.output.dirs.wwwscripts));
}