bower install also installs several paper elements plus neon-animation

[miztroh-zz]

Running the following command produces the output shown below. Seems odd that installing iron-elements should also install some paper-elements and neon-animation.

bower install --save PolymerElements/iron-elements

iron-elements#1.0.7 bower_components\iron-elements ├── iron-a11y-announcer#1.0.4 ├── iron-a11y-keys#1.0.4 ├── iron-a11y-keys-behavior#1.1.0 ├── iron-ajax#1.1.1 ├── iron-autogrow-textarea#1.0.10 ├── iron-behaviors#1.0.12 ├── iron-checked-element-behavior#1.0.4 ├── iron-collapse#1.0.5 ├── iron-component-page#1.1.3 ├── iron-demo-helpers#1.0.3 ├── iron-doc-viewer#1.0.12 ├── iron-dropdown#1.1.0 ├── iron-fit-behavior#1.0.5 ├── iron-flex-layout#1.2.2 ├── iron-form#1.0.13 ├── iron-form-element-behavior#1.0.6 ├── iron-icon#1.0.7 ├── iron-icons#1.1.1 ├── iron-iconset#1.0.4 ├── iron-iconset-svg#1.0.9 ├── iron-image#1.0.4 ├── iron-input#1.0.8 ├── iron-jsonp-library#1.0.4 ├── iron-label#1.0.1 ├── iron-list#1.1.7 ├── iron-localstorage#1.0.5 ├── iron-media-query#1.0.8 ├── iron-menu-behavior#1.0.7 ├── iron-meta#1.1.1 ├── iron-overlay-behavior#1.1.2 ├── iron-page-url#0.7.0 ├── iron-pages#1.0.5 ├── iron-range-behavior#1.0.4 ├── iron-resizable-behavior#1.0.2 ├── iron-selector#1.0.8 ├── iron-signals#1.0.3 ├── iron-swipeable-container#1.0.2 ├── iron-test-helpers#1.1.3 ├── iron-validatable-behavior#1.0.5 └── iron-validator-behavior#1.0.1

iron-a11y-announcer#1.0.4 bower_components\iron-a11y-announcer └── polymer#1.2.3

iron-ajax#1.1.1 bower_components\iron-ajax ├── polymer#1.2.3 └── promise-polyfill#1.0.0

iron-a11y-keys-behavior#1.1.0 bower_components\iron-a11y-keys-behavior └── polymer#1.2.3

iron-a11y-keys#1.0.4 bower_components\iron-a11y-keys ├── iron-a11y-keys-behavior#1.1.0 └── polymer#1.2.3

iron-autogrow-textarea#1.0.10 bower_components\iron-autogrow-textarea ├── iron-behaviors#1.0.12 ├── iron-flex-layout#1.2.2 ├── iron-form-element-behavior#1.0.6 ├── iron-validatable-behavior#1.0.5 └── polymer#1.2.3

iron-fit-behavior#1.0.5 bower_components\iron-fit-behavior └── polymer#1.2.3

iron-form#1.0.13 bower_components\iron-form ├── iron-ajax#1.1.1 └── polymer#1.2.3

iron-icon#1.0.7 bower_components\iron-icon ├── iron-flex-layout#1.2.2 ├── iron-meta#1.1.1 └── polymer#1.2.3

iron-swipeable-container#1.0.2 bower_components\iron-swipeable-container └── polymer#1.2.3

iron-jsonp-library#1.0.4 bower_components\iron-jsonp-library └── polymer#1.2.3

iron-iconset#1.0.4 bower_components\iron-iconset ├── iron-meta#1.1.1 └── polymer#1.2.3

iron-image#1.0.4 bower_components\iron-image ├── iron-flex-layout#1.2.2 └── polymer#1.2.3

iron-localstorage#1.0.5 bower_components\iron-localstorage └── polymer#1.2.3

iron-iconset-svg#1.0.9 bower_components\iron-iconset-svg ├── iron-meta#1.1.1 └── polymer#1.2.3

iron-meta#1.1.1 bower_components\iron-meta └── polymer#1.2.3

iron-range-behavior#1.0.4 bower_components\iron-range-behavior └── polymer#1.2.3

iron-selector#1.0.8 bower_components\iron-selector └── polymer#1.2.3

iron-checked-element-behavior#1.0.4 bower_components\iron-checked-element-behavior ├── iron-form-element-behavior#1.0.6 ├── iron-validatable-behavior#1.0.5 └── polymer#1.2.3

iron-demo-helpers#1.0.3 bower_components\iron-demo-helpers ├── marked-element#1.1.1 ├── paper-styles#1.1.2 ├── polymer#1.2.3 └── prism-element#1.0.3

iron-resizable-behavior#1.0.2 bower_components\iron-resizable-behavior └── polymer#1.2.3

iron-signals#1.0.3 bower_components\iron-signals └── polymer#1.2.3

iron-validator-behavior#1.0.1 bower_components\iron-validator-behavior ├── iron-meta#1.1.1 └── polymer#1.2.3

iron-dropdown#1.1.0 bower_components\iron-dropdown ├── iron-a11y-keys-behavior#1.1.0 ├── iron-behaviors#1.0.12 ├── iron-overlay-behavior#1.1.2 ├── iron-resizable-behavior#1.0.2 ├── neon-animation#1.0.9 └── polymer#1.2.3

prism-element#1.0.3 bower_components\prism-element ├── polymer#1.2.3 └── prism#1.3.0

iron-validatable-behavior#1.0.5 bower_components\iron-validatable-behavior ├── iron-meta#1.1.1 └── polymer#1.2.3

iron-label#1.0.1 bower_components\iron-label └── polymer#1.2.3

promise-polyfill#1.0.0 bower_components\promise-polyfill └── polymer#1.2.3

iron-flex-layout#1.2.2 bower_components\iron-flex-layout └── polymer#1.2.3

iron-page-url#0.7.0 bower_components\iron-page-url └── polymer#1.2.3

prism#1.3.0 bower_components\prism

iron-collapse#1.0.5 bower_components\iron-collapse └── polymer#1.2.3

iron-behaviors#1.0.12 bower_components\iron-behaviors ├── iron-a11y-keys-behavior#1.1.0 └── polymer#1.2.3

iron-component-page#1.1.3 bower_components\iron-component-page ├── hydrolysis#1.21.4 ├── iron-ajax#1.1.1 ├── iron-doc-viewer#1.0.12 ├── iron-flex-layout#1.2.2 ├── iron-icons#1.1.1 ├── iron-selector#1.0.8 ├── paper-header-panel#1.1.2 ├── paper-styles#1.1.2 ├── paper-toolbar#1.1.2 └── polymer#1.2.3

iron-form-element-behavior#1.0.6 bower_components\iron-form-element-behavior └── polymer#1.2.3

hydrolysis#1.21.4 bower_components\hydrolysis

iron-input#1.0.8 bower_components\iron-input ├── iron-validatable-behavior#1.0.5 └── polymer#1.2.3

iron-pages#1.0.5 bower_components\iron-pages ├── iron-resizable-behavior#1.0.2 ├── iron-selector#1.0.8 └── polymer#1.2.3

marked-element#1.1.1 bower_components\marked-element ├── marked#0.3.5 └── polymer#1.2.3

iron-media-query#1.0.8 bower_components\iron-media-query └── polymer#1.2.3

iron-menu-behavior#1.0.7 bower_components\iron-menu-behavior ├── iron-a11y-keys-behavior#1.1.0 ├── iron-selector#1.0.8 └── polymer#1.2.3

iron-test-helpers#1.1.3 bower_components\iron-test-helpers └── polymer#1.2.3

iron-overlay-behavior#1.1.2 bower_components\iron-overlay-behavior ├── iron-fit-behavior#1.0.5 ├── iron-resizable-behavior#1.0.2 └── polymer#1.2.3

iron-doc-viewer#1.0.12 bower_components\iron-doc-viewer ├── marked-element#1.1.1 ├── paper-button#1.0.11 ├── paper-styles#1.1.2 ├── polymer#1.2.3 └── prism-element#1.0.3

iron-icons#1.1.1 bower_components\iron-icons ├── iron-icon#1.0.7 ├── iron-iconset-svg#1.0.9 └── polymer#1.2.3

paper-styles#1.1.2 bower_components\paper-styles ├── font-roboto#1.0.1 ├── iron-flex-layout#1.2.2 └── polymer#1.2.3

marked#0.3.5 bower_components\marked

paper-header-panel#1.1.2 bower_components\paper-header-panel ├── iron-flex-layout#1.2.2 └── polymer#1.2.3

paper-toolbar#1.1.2 bower_components\paper-toolbar ├── iron-flex-layout#1.2.2 ├── paper-styles#1.1.2 └── polymer#1.2.3

font-roboto#1.0.1 bower_components\font-roboto

iron-list#1.1.7 bower_components\iron-list ├── iron-resizable-behavior#1.0.2 └── polymer#1.2.3

neon-animation#1.0.9 bower_components\neon-animation ├── iron-meta#1.1.1 ├── iron-resizable-behavior#1.0.2 ├── iron-selector#1.0.8 ├── paper-styles#1.1.2 ├── polymer#1.2.3 └── web-animations-js#2.1.3

paper-button#1.0.11 bower_components\paper-button ├── iron-flex-layout#1.2.2 ├── paper-behaviors#1.0.10 ├── paper-material#1.0.5 ├── paper-ripple#1.0.5 └── polymer#1.2.3

paper-behaviors#1.0.10 bower_components\paper-behaviors ├── iron-behaviors#1.0.12 ├── iron-checked-element-behavior#1.0.4 └── polymer#1.2.3

paper-ripple#1.0.5 bower_components\paper-ripple ├── iron-a11y-keys-behavior#1.1.0 └── polymer#1.2.3

paper-material#1.0.5 bower_components\paper-material ├── paper-styles#1.1.2 └── polymer#1.2.3

web-animations-js#2.1.3 bower_components\web-animations-js

[ebidel]

Why is that weird? The animations provided by https://github.com/PolymerElements/neon-animation/tree/master/animations is a dependency to iron-dropdown like any other dependency.

[miztroh-zz]

OK, neon-animation is more understandable. But, what about the paper elements?

[notwaldorf]

They are dev dependencies, used in some of the demos.