javascript - learn - ionic2 falla durante el direccionamiento al servidor de desarrollo en ejecución(ion hello world)

ionic documentation

Question

ionic2 hello world no funciona.

Estoy siguiendo comenzar en el sitio oficial - https://ionicframework.com/docs/v2/intro/tutorial/

install cordova and ionic
ionic start probaionic --v2
cd probaionic
ionic serve

Todo funciona bien: el servidor dev se ejecuta: http: // localhost: 8100 /

Cuando intento abordar esta URL, aparece este error:

traineeProgram/probaionic/node_modules/@ionic/app-scripts/dist/dev-server /live-reload.js:27
var contentStr = content.toString();
^
TypeError: Cannot read property ''toString'' of undefined
at Object.injectLiveReloadScript (/media/volodymyr/Media/[[1]] work/[8]programming/[1]keenethics/traineeProgram/probaionic/node_modules/@ionic/app-scripts/dist/dev-server/live-reload.js:27:29)
at ReadFileContext.callback (/media/volodymyr/Media/[[1]] work/[8]programming/[1]keenethics/traineeProgram/probaionic/node_modules/@ionic/app-scripts/dist/dev-server/http-server.js:62:39)
at FSReqWrap.readFileAfterOpen [as oncomplete] (fs.js:365:13)
npm ERR! Linux 4.4.0-57-generic
npm ERR! argv "/usr/bin/nodejs" "/usr/bin/npm" "run" "ionic:serve" "--" "--v2" "--address" "0.0.0.0" "--port" "8100" "--livereload-port" "35729"
npm ERR! node v6.9.5
npm ERR! npm v4.1.2
npm ERR! code ELIFECYCLE
npm ERR! ionic-hello-world@ ionic:serve: `ionic-app-scripts serve "--v2" "--address" "0.0.0.0" "--port" "8100" "--livereload-port" "35729"`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the ionic-hello-world@ ionic:serve script ''ionic-app-scripts serve "--v2" "--address" "0.0.0.0" "--port" "8100" "--livereload-port" "35729"''.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the ionic-hello-world package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! ionic-app-scripts serve "--v2" "--address" "0.0.0.0" "--port" "8100" "--livereload-port" "35729"
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs ionic-hello-world
npm ERR! Or if that isn''t available, you can get their info via:
npm ERR! npm owner ls ionic-hello-world
npm ERR! There is likely additional logging output above.

Answer 1

Enfrenté el mismo problema con la advertencia siguiente

************************************************** **** Advertencia de dependencia: para que la CLI se ejecute correctamente, se recomienda encarecidamente instalar / actualizar lo siguiente: Instalar su CLI de Cordova en la versión> = 4.2.0 npm instalar -g cordova Instalar ios-sim para implementar aplicaciones de iOS . npm install -g ios-sim (puede requerir sudo) Instalar ios-deploy para implementar aplicaciones de iOS en dispositivos. npm install -g ios-deploy (puede requerir sudo)

intente, ejecutando el comando cordova -v se le seleccionará con la pregunta siguiente

? May Cordova anonymously report usage statistics to improve the tool over time? No

Usé no y mostró que la versión era 6.5.0

You have been opted out of telemetry. To change this, run: cordova telemetry on. 6.5.0

Ejecuté el comando ionic serve otra vez y funcionó.