How to run vue-cli webpack template on Cloud 9?

How to run vue-cli webpack template on Cloud 9?


Hi guys,

I’m getting into Vue.js and want to get setup on Cloud 9. I can install everything just fine, but when I then goto run npm run dev it says Your application is running here: http://localhost:8080 but then when i click to preview it says the “app doesn’t seem to be here” and the URL is now

I understand that c9 reroutes the app, and that localhost works only “locally”. But how do I configure webpack/cloud 9 to work?

Thank you in advance!


You should probably specify the port you want your webpack dev server to run to.
You can use the flags --port and --host to set them as to what cloud9 uses by default.

 --host $IP --port $PORT

Hope it helps.

[side personal note] maybe it’s time to ditch a preconfig online IDE and start working on your own :slight_smile:


Thanks for the help. But it still runs at Port 8080, however instead of the app not working, when i open the window it says this Invalid Host header and that’s all…

However, I did manage to get the app running with this code:
webpack-dev-server --inline --progress --port 8080 --host --config build/ --public $C9_HOSTNAME

Thanks to this forum link


New to Vue & it took me a few extra minutes to understand where you were adding this…
It’s in the package.json, line 8 under dev scripts… for future thread readers or me when I forget.

 "name": "employeemanager",
 "version": "1.0.0",
 "description": "A Vue.js project",
 "author": "TurtleWolfe <>",
 "private": true,
 "scripts": {
   "dev": "webpack-dev-server --inline --progress --port 8080 --host --config build/ --public $C9_HOSTNAME",
   "start": "npm run dev",
   "build": "node build/build.js"
 "dependencies": {
   "vue": "^2.5.2",
   "vue-router": "^3.0.1"
 "devDependencies": {
   "autoprefixer": "^7.1.2",
   "babel-core": "^6.22.1",
   "babel-helper-vue-jsx-merge-props": "^2.0.3",
   "babel-loader": "^7.1.1",
   "babel-plugin-syntax-jsx": "^6.18.0",
   "babel-plugin-transform-runtime": "^6.22.0",
   "babel-plugin-transform-vue-jsx": "^3.5.0",
   "babel-preset-env": "^1.3.2",
   "babel-preset-stage-2": "^6.22.0",
   "chalk": "^2.0.1",
   "copy-webpack-plugin": "^4.0.1",
   "css-loader": "^0.28.0",
   "extract-text-webpack-plugin": "^3.0.0",
   "file-loader": "^1.1.4",
   "friendly-errors-webpack-plugin": "^1.6.1",
   "html-webpack-plugin": "^2.30.1",
   "node-notifier": "^5.1.2",
   "optimize-css-assets-webpack-plugin": "^3.2.0",
   "ora": "^1.2.0",
   "portfinder": "^1.0.13",
   "postcss-import": "^11.0.0",
   "postcss-loader": "^2.0.8",
   "postcss-url": "^7.2.1",
   "rimraf": "^2.6.0",
   "semver": "^5.3.0",
   "shelljs": "^0.7.6",
   "uglifyjs-webpack-plugin": "^1.1.1",
   "url-loader": "^0.5.8",
   "vue-loader": "^13.3.0",
   "vue-style-loader": "^3.0.1",
   "vue-template-compiler": "^2.5.2",
   "webpack": "^3.6.0",
   "webpack-bundle-analyzer": "^2.9.0",
   "webpack-dev-server": "^2.9.1",
   "webpack-merge": "^4.1.0"
 "engines": {
   "node": ">= 6.0.0",
   "npm": ">= 3.0.0"
 "browserslist": [
   "> 1%",
   "last 2 versions",
   "not ie <= 8"