Enable sourcemaps for bundles and include sourcemap for plugins in npm package. (#24303)

package.json

@@ -36,12 +36,12 @@
     "js-lint": "eslint js/ && eslint --config js/tests/.eslintrc.json --env node build/",
     "js-lint-docs": "eslint --config js/tests/.eslintrc.json assets/js/ docs/ sw.js",
     "js-compile": "npm-run-all --parallel js-compile-*",
-    "js-compile-standalone": "cross-env ROLLUP=true rollup --environment BUNDLE:false --config build/rollup.config.js",
-    "js-compile-bundle": "cross-env ROLLUP=true rollup --environment BUNDLE:true --config build/rollup.config.js",
+    "js-compile-standalone": "cross-env ROLLUP=true rollup --environment BUNDLE:false --config build/rollup.config.js --sourcemap",
+    "js-compile-bundle": "cross-env ROLLUP=true rollup --environment BUNDLE:true --config build/rollup.config.js --sourcemap",
     "js-compile-plugins": "cross-env PLUGINS=true babel js/src/ --out-dir js/dist/ --source-maps",
     "js-minify": "npm-run-all --parallel js-minify-*",
-    "js-minify-standalone": "uglifyjs --compress typeofs=false --mangle --comments \"/^!/\" --output dist/js/bootstrap.min.js dist/js/bootstrap.js",
-    "js-minify-bundle": "uglifyjs --compress typeofs=false --mangle --comments \"/^!/\" --output dist/js/bootstrap.bundle.min.js dist/js/bootstrap.bundle.js",
+    "js-minify-standalone": "uglifyjs --compress typeofs=false --mangle --comments \"/^!/\" --source-map \"content=dist/js/bootstrap.js.map,includeSources,url=bootstrap.min.js.map\" --output dist/js/bootstrap.min.js dist/js/bootstrap.js",
+    "js-minify-bundle": "uglifyjs --compress typeofs=false --mangle --comments \"/^!/\" --source-map \"content=dist/js/bootstrap.bundle.js.map,includeSources,url=bootstrap.bundle.min.js.map\" --output dist/js/bootstrap.bundle.min.js dist/js/bootstrap.bundle.js",
     "js-minify-docs": "uglifyjs --mangle --comments \"/^!/\" --output assets/js/docs.min.js assets/js/vendor/anchor.min.js assets/js/vendor/clipboard.min.js assets/js/vendor/holder.min.js assets/js/src/application.js assets/js/src/pwa.js",
     "js-test": "phantomjs ./node_modules/qunit-phantomjs-runner/runner.js js/tests/index.html 60",
     "js-test-cloud": "ruby -r webrick -e \"s = WEBrick::HTTPServer.new(:Port => 3000, :DocumentRoot => Dir.pwd, :Logger => WEBrick::Log.new('/dev/null'), :AccessLog => []); trap('INT') { s.shutdown }; s.start\" & node build/saucelabs-unit-test.js",
@@ -125,6 +125,7 @@
     "build",
     "js/.eslintrc.json",
     "js/**/*.js",
+    "js/**/*.js.map",
     "scss/**/*.scss"
   ],
   "browserslist": [