Npm run dev wont work - Githubissues

Hi thanks for the tutorial however followed exactly and project won't show in the browser

`$ npm run dev

web-components@1.0.0 dev C:\repos\web-components webpack-dev-server --env.mode development

i ｢wds｣: Project is running at http://localhost:8080/ i ｢wds｣: webpack output is served from / i ｢wds｣: Content not from webpack is served from C:\repos\web-compo × ｢wdm｣: Hash: 242bd802d773cad55a74 Version: webpack 4.39.0 Time: 3422ms Built at: 08/01/2019 6:36:48 PM Asset
Chunk Names index.html 1.

                                                   main.js   1.

main main.js.map 1. main webcomponents/bundles/webcomponents-ce.js 16

           webcomponents/bundles/webcomponents-sd-ce-pf.js    1

              webcomponents/bundles/webcomponents-sd-ce.js   80

                 webcomponents/bundles/webcomponents-sd.js   65

              webcomponents/custom-elements-es5-adapter.js  924

webcomponents/entrypoints/custom-elements-es5-adapter-index.js 656

   webcomponents/entrypoints/webcomponents-bundle-index.js   1.

       webcomponents/entrypoints/webcomponents-ce-index.js  672

    webcomponents/entrypoints/webcomponents-sd-ce-index.js  851

 webcomponents/entrypoints/webcomponents-sd-ce-pf-index.js   1.

       webcomponents/entrypoints/webcomponents-sd-index.js  761

                     webcomponents/webcomponents-bundle.js    1

                     webcomponents/webcomponents-loader.js   6.

Entrypoint main = main.js main.js.map [0] multi (webpack)-dev-server/client?http://localhost ./src 40 byt [./node_modules/@vaadin/vaadin-grid/theme/lumo/vaadin-grid.js] 422 [./node_modules/@vaadin/vaadin-grid/vaadin-grid.js] 38 bytes {main} [./node_modules/@vaadin/vaadin-text-field/theme/lumo/vaadin-text-fiuilt] [./node_modules/@vaadin/vaadin-text-field/vaadin-text-field.js] 44 [./node_modules/webpack-dev-server/client/index.js?http://localhostent?http://localhost 4.29 KiB {main} [built] [./node_modules/webpack-dev-server/client/overlay.js] (webpack)-dev 3.51 KiB {main} [built] [./node_modules/webpack-dev-server/client/socket.js] (webpack)-dev-[./node_modules/webpack-dev-server/client/utils/createSocketUrl.js] [./node_modules/webpack-dev-server/client/utils/log.js] (webpack)-d[./node_modules/webpack-dev-server/client/utils/reloadApp.js] (webp [./node_modules/webpack-dev-server/client/utils/sendMessage.js] (we[./node_modules/webpack-dev-server/node_modules/strip-ansi/index.js [./node_modules/webpack/hot sync ^.\/log$] (webpack)/hot sync nonr[./src/index.js] 785 bytes {main} [built]

167 hidden modules ERROR in ./src/index.jsModule not found: Error: Can't resolve '@vaadin' in 'C:\repos\web-c @ ./src/index.js 1:0-17Child html-webpack-plugin for "index.html": 1 asset Entrypoint undefined = index.html [./node_modules/html-webpack-plugin/lib/loader.js!./src/index.h [./node_modules/html-webpack-plugin/node_modules/lodash/lodash. [./node_modules/webpack/buildin/global.js] (webpack)/buildin/gl [./node_modules/webpack/buildin/module.js] (webpack)/buildin/mo i ｢wdm｣: Failed to compile. i ｢wdm｣: Compiling... i ｢wdm｣: Hash: e648e2e0a2af36ce9cfa Version: webpack 4.39.0 Time: 1882ms Built at: 08/01/2019 6:40:42 PM Asset Size Chunks Chunk Names index.html 1.12 KiB [emitted] main.js 2.13 MiB main [emitted] main main.js.map 2.24 MiB main [emitted] main Entrypoint main = main.js main.js.map [./node_modules/@vaadin/vaadin-button/node_modules/@polymer/polymerb/mixins/gesture-event-listeners.js] 2.51 KiB {main} [built] [./node_modules/@vaadin/vaadin-button/node_modules/@polymer/polymerb/utils/gestures.js] 29.1 KiB {main} [built] [./node_modules/@vaadin/vaadin-button/node_modules/@polymer/polymerb/utils/html-tag.js] 4.22 KiB {main} [built] [./node_modules/@vaadin/vaadin-button/node_modules/@polymer/polymerlymer-element.js] 1.24 KiB {main} [built] [./node_modules/@vaadin/vaadin-button/node_modules/@vaadin/vaadin-crol-state-mixin/vaadin-control-state-mixin.js] 8.01 KiB {main} [bui [./node_modules/@vaadin/vaadin-button/node_modules/@vaadin/vaadin-eent-mixin/vaadin-element-mixin.js] 1.6 KiB {main} [built] [./node_modules/@vaadin/vaadin-button/node_modules/@vaadin/vaadin-lr.js] 7.43 KiB {main} [built] [./node_modules/@vaadin/vaadin-button/node_modules/@vaadin/vaadin-lng.js] 667 bytes {main} [built] [./node_modules/@vaadin/vaadin-button/node_modules/@vaadin/vaadin-ling.js] 1.27 KiB {main} [built] [./node_modules/@vaadin/vaadin-button/node_modules/@vaadin/vaadin-le.js] 1.23 KiB {main} [built] [./node_modules/@vaadin/vaadin-button/src/vaadin-button.js] 5.08 Ki] [./node_modules/@vaadin/vaadin-button/theme/lumo/vaadin-button-styl {main} [built] [./node_modules/@vaadin/vaadin-button/theme/lumo/vaadin-button.js] [built] [./node_modules/@vaadin/vaadin-button/vaadin-button.js] 40 bytes {m[./src/index.js] 799 bytes {main} [built]
213 hidden modules Child html-webpack-plugin for "index.html": 1 asset Entrypoint undefined = index.html = index.html 4 modules fully. i ｢wdm｣: Compiled successfully.`

vaadin-learning-center / using-web-components

Npm run dev wont work #1