Archives / 2015 / September
  • Polymer 1.0 - Polylint - use on project instead of component

    The Polymer team just release Polylint, a tool to catch errors in your polymer project before even running your code.

    The tool seems to be designed to work in a component, but it faisl in a project that follows the project structure as used in the Polymer Starter Kit.

    You can see this structure at

    In this structure the folder bower_components folder is located next to the app folder, instead of in the app folder.

    To get started:

    git clone

    cd  polymer-starter-kit

    bower install

    Now if you run the command polylint --root app --input index.html you will get the following errors:

    ERROR finding app\bower_components\webcomponentsjs\webcomponents-lite.js
    Error: ENOENT, open 'C:\p\serge\polymer-starter-kit\app\bower_components\webcomponentsjs\webcomponents-lite.js'
    at Error (native)
    ERROR finding app\bower_components\iron-flex-layout\classes\iron-flex-layout.html
    ERROR finding app\bower_components\iron-icons\iron-icons.html
    ERROR finding app\bower_components\iron-pages\iron-pages.html
    ERROR finding app\bower_components\iron-selector\iron-selector.html
    ERROR finding app\bower_components\paper-drawer-panel\paper-drawer-panel.html
    ERROR finding app\bower_components\paper-icon-button\paper-icon-button.html
    ERROR finding app\bower_components\paper-item\paper-item.html
    ERROR finding app\bower_components\paper-material\paper-material.html
    ERROR finding app\bower_components\paper-menu\paper-menu.html
    ERROR finding app\bower_components\paper-scroll-header-panel\paper-scroll-header-panel.html
    ERROR finding app\bower_components\paper-styles\paper-styles-classes.html
    ERROR finding app\bower_components\paper-toast\paper-toast.html
    ERROR finding app\bower_components\paper-toolbar\paper-toolbar.html
    ERROR finding app\bower_components\page\page.js
    ERROR finding app\bower_components\polymer\polymer.html

    This can be solved by creating a symbolic link bower_components in the app folder to ..\bower_components.

    The following script RunPolylint.bat will do this, place it in the root of your project (next to the app folder.

    :: RunPolylint.bat - by Serge van den Oever,
    :: This script assumes that polylint in installed
    :: globally through the following command:
    :: npm install -g polylint
    :: Polylint assumes that the bower_components folder is located
    :: in the same folder as the entry point file as specified with --input.
    :: This is the case for a Polymer component, but not for an application
    :: that follows the structure of the Polymer Starter Kit.
    :: This script solves this issue by creating a temporary symbolic link
    :: to the folder bower_components in the folder app
    @cd %~dp0
    set root=app
    set input=index.html
    pushd %root%
    mklink bower_components ..\bower_components
    polylint --root %root% --input %input%
    del %root\bower_components