Angular2 QuickStart npm start is not working correctly
Asked Answered
M

32

107

File structure

I know Angular2 beta has just been released but I can't reproduce the steps from their official site tutorial ( https://angular.io/guide/quickstart ). Maybe someone has had similar issues and knows what to do in order to fix the this? When I try to start the application with npm start command I get output like this:

0 info it worked if it ends with ok
1 verbose cli [ 'node', '/usr/local/bin/npm', 'start' ]
2 info using [email protected]
3 info using [email protected]
4 verbose run-script [ 'prestart', 'start', 'poststart' ]
5 info prestart [email protected]
6 info start [email protected]
7 verbose unsafe-perm in lifecycle true
8 info [email protected] Failed to exec start script
9 verbose stack Error: [email protected] start: `concurrent "npm run tsc:w" "npm run lite" `
9 verbose stack Exit status 127
9 verbose stack     at EventEmitter.<anonymous> (/usr/local/lib/node_modules/npm/lib/utils/lifecycle.js:213:16)
9 verbose stack     at EventEmitter.emit (events.js:110:17)
9 verbose stack     at ChildProcess.<anonymous> (/usr/local/lib/node_modules/npm/lib/utils/spawn.js:14:12)
9 verbose stack     at ChildProcess.emit (events.js:110:17)
9 verbose stack     at maybeClose (child_process.js:1015:16)
9 verbose stack     at Process.ChildProcess._handle.onexit (child_process.js:1087:5)
10 verbose pkgid [email protected]
11 verbose cwd /Users/tmrovsky/Documents/angular2/angular2-quickstart
12 error Darwin 13.4.0
13 error argv "node" "/usr/local/bin/npm" "start"
14 error node v0.12.2
15 error npm  v2.7.4
16 error code ELIFECYCLE
17 error [email protected] start: `concurrent "npm run tsc:w" "npm run lite" `
17 error Exit status 127
18 error Failed at the [email protected] start script 'concurrent "npm run tsc:w" "npm run lite" '.
18 error This is most likely a problem with the angular2-quickstart package,
18 error not with npm itself.
18 error Tell the author that this fails on your system:
18 error     concurrent "npm run tsc:w" "npm run lite"
18 error You can get their info via:
18 error     npm owner ls angular2-quickstart
18 error There is likely additional logging output above.
19 verbose exit [ 1, true ]

I had: typescript 1.7.5 version node 0.12.2 version

Maybe someone could help solve the problem :) ?

package.json:

{
  "name": "angular2-quickstart",
  "version": "1.0.0",
  "scripts": {
    "tsc": "tsc",
    "tsc:w": "tsc -w",
    "lite": "lite-server",
    "start": "concurrent \"npm run tsc:w\" \"npm run lite\" "
  },
  "license": "ISC",
  "dependencies": {
    "angular2": "2.0.0-beta.0",
    "systemjs": "0.19.6",
    "es6-promise": "^3.0.2",
    "es6-shim": "^0.33.3",
    "reflect-metadata": "0.1.2",
    "rxjs": "5.0.0-beta.0",
    "zone.js": "0.5.10"
  },
  "devDependencies": {
    "concurrently": "^1.0.0",
    "lite-server": "^1.3.1",
    "typescript": "^1.7.3"
  }
}

index.html:

<html>

<head>
    <title>Angular 2 QuickStart</title>

    <!-- 1. Load libraries -->
    <script src="node_modules/es6-shim/es6-shim.js"></script>
    <script src="node_modules/angular2/bundles/angular2-polyfills.js"></script>
    <script src="node_modules/systemjs/dist/system.src.js"></script>
    <script src="node_modules/rxjs/bundles/Rx.js"></script>
    <script src="node_modules/angular2/bundles/angular2.dev.js"></script>

    <!-- 2. Configure SystemJS -->
    <script>
        System.config({
            packages: {
                app: {
                    format: 'register',
                    defaultExtension: 'js'
                }
            }
        });
        System.import('app/boot')
                .then(null, console.error.bind(console));
    </script>

</head>

<!-- 3. Display the application -->
<body>
<my-app>Loading...</my-app>
</body>

</html>

app.components.ts:

import {Component} from 'angular2/core';

@Component({
    selector: 'my-app',
    template: '<h1>My First Angular 2 App</h1>',
})

export class AppComponent {}

boot.js:

import {bootstrap} from 'angular2/platform/browser'
import  {AppComponent} from './app.component'

bootstrap(AppComponent);
Metric answered 17/12, 2015 at 13:5 Comment(7)
Could you edit your post with your files please ?Doghouse
What is your folder structure ? is the index.html in app/ or outside of it ?Heer
First, your file boot.js must be a TypeScript file rename it as boot.ts. I don't see anything else that seems wrong... As the_critic said could you give us your project structure.Doghouse
It is boot.ts. I typed 'js' here on stackoverflow by mistake - sorry. Index html is on the root like package.json for example. It is not in app/ directory.Metric
Make sure your node version is >=4.2.1 <5 and your npm version is >=2.14.7 <3.0 as specified in DEVELOPER guide. I think you can make it work with node 5, but I'm not aware of how.Schism
Installing all of the packages globally solved my problem.Stopgap
Why do you run tsc twice (tsc and tsc -w)?Barns
I
226

Change the start field in package.json from

"start": "tsc && concurrently \"npm run tsc:w\" \"npm run lite\" "

to

"start": "concurrently \"npm run tsc:w\" \"npm run lite\" "
Intransigeance answered 20/5, 2016 at 4:9 Comment(5)
Why did he run tsc twice (tsc and tsc -w)?Barns
It worked! But why? Started to get discouraged in ng2.Narcose
In the "play by play angular 2 quick start" course on Pluralsight Ward Bell explains this. "tsc" compiles the code first because without that, in bigger project, it's possible that the server starts before the compilation has ended. In that case the server would throw an error indicating it doesn't know what to do.Inconstant
In 2017, your workaround in your answer exposed the true problem, which was that there were compilation errors in the typescript in the app code. When I fixed the compilation errors, the original version worked fine without your workaround anymore.Armallas
Excellent ... "start": "concurrently \"npm run tsc:w\" \"npm run lite\" " worked for me...Melinamelinda
R
88

In order to get npm start running for me, I had to make sure I had globally installed some of the devDependencies. Have you tried:

  • npm install -g concurrently
  • npm install -g lite-server
  • npm install -g typescript
Radius answered 19/12, 2015 at 4:16 Comment(7)
but i think lite-server is optional you may can use other services tooLilybel
Worked for me. sudo npm update -g && sudo npm install -g concurrently lite-server typescript.Marybellemarybeth
don't forget to uninstall the local version: npm uninstall lite-serverHomerus
I had the same problem starting the web server using angular2-seed from Udemy course. This has fixed my issue.Kalinin
Yes! installing the lite-server globally and uninstalling the local package finally worked for me on Vagrant! Thanks so much!Mahayana
Didn;t work for me. Now i keep getting following error: npm ERR! undefined prepublish: gulp prepublishCatechist
what if we dont do this what you said, what is the use of installing them globallyAgora
D
48

First you need update npm, lite-server and typescript:

sudo npm update -g && sudo npm install -g concurrently lite-server typescript

Delete node_modules folder from your Angular project directory (if exist). Next run:

npm install

After that resolve ENOSPC errors:

echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p

Finally:

npm start

This is my package.json file:

{
  "name": "reservationsystem",
  "version": "0.0.1",
  "scripts": {
    "tsc": "tsc",
    "tsc:w": "tsc -w",
    "lite": "lite-server",
    "start": "concurrent \"npm run tsc:w\" \"npm run lite\" "
  },
  "dependencies": {
    "a2-in-memory-web-api": "~0.1.0",
    "angular2": "2.0.0-beta.3",
    "es6-promise": "^3.0.2",
    "es6-shim": "^0.33.3",
    "reflect-metadata": "0.1.2",
    "rxjs": "5.0.0-beta.0",
    "systemjs": "0.19.17",
    "zone.js": "0.5.11"
  },
  "devDependencies": {
    "concurrently": "^1.0.0",
    "lite-server": "^2.0.1",
    "typescript": "^1.7.5"
  }
}
Desdamonna answered 10/2, 2016 at 14:23 Comment(5)
I upvoted because this fixed my problem. However I would love to understand how adding fs.inotify.max_user_watches to /etc/sysctl fixed it.Paleethnology
It appears that the watcher needs more memory and this provides that.Paleethnology
I found it seemed to work better when I delete the modules first -- rm -r node_modules/. Anyway as the man says, it got me going; I'm struck that fs.inotify.max_user_watches=524288 seem excessive to me though. Is there improved sanity in the wind?Maidenhood
It is worth adding that the Javascript quickstart fires off right out of the box. NO huge extras. And when the server stops the web page stays on screen. The typescript version just vanishes with a 404 puff of smokeMaidenhood
this has saved me, thank you. echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -pSharmainesharman
R
15

I had the same error on windows 10. It looks like it's problem with concurrently npm package. I found 2 options how to solve this error:

  • 1. Run both commands in 2 separate cmds:

    • in the first one run: npm run tsc:w
    • in the second one: npm run lite
  • 2. Change package.json

    • just change the start option to this: "start": "tsc && npm run tsc:w | npm run lite",
Robber answered 20/8, 2016 at 10:22 Comment(4)
Just to note. On Linux: "start": "tsc && npm run tsc:w & npm run lite", Lightness
Well, it's auto-recompiling for me.Robber
I was referring to my first comment :) on linux it won't workLightness
Only this solution worked for me. Tried first (run both commands in 2 separate cmds). Then stopped process in both cmds. Finally apply second (change package.json) and run "npm start" in one cmd alone. If I change one file, automatically localhost:3000 refreshes and show my changes. Thanks a lot!Syndicalism
Y
13

Here's how I solved the problem today after hours of trying all of these different solutions - (for anyone looking for another way still).

Open 2 instances of cmd at your quickstart dir:

window #1:

npm run build:watch

then...

window #2:

npm run serve

It will then open in the browser and work as expected

Yt answered 9/2, 2017 at 16:54 Comment(0)
F
9

I had a similar problem after copying the angular2-quickstart folder (including node_modules) to create the angular2-tour-of-heroes folder. This was wierd because the original was compiling fine but the copy was not...

npm run tsc

I was able to resolve the issue by deleting the node_modules folder and re-running npm install.

This was a surprise to me, so I did a diff between the 2 folders...

diff -rw angular2-quickstart/node_modules/ angular2-tour-of-heroes/node_modules/

there were a LOT of differences, a lot of 'where' diffs in the package.json files like this:-

diff -rw angular2-quickstart/node_modules/yargs/package.json angular2-tour-of-heroes/node_modules/yargs/package.json
5c5
<       "/Users/michael/Tutorials/angular2/angular2-quickstart/node_modules/lite-server"
---
>       "/Users/michael/Tutorials/angular2/angular2-tour-of-heroes/node_modules/lite-server"

...which kind of makes sense but there were also some like this:-

diff -rw angular2-quickstart/node_modules/utf-8-validate/build/gyp-mac-tool angular2-tour-of-heroes/node_modules/utf-8-validate/build/gyp-mac-tool
607c607,608
<       return {k: self._ExpandVariables(data[k], substitutions) for k in data}
---
>       return dict((k, self._ExpandVariables(data[k],
>                                             substitutions)) for k in data)

...which I don't understand at all.

Oh well, Hope this helps.

Finzer answered 21/12, 2015 at 21:42 Comment(0)
D
5

Change the start field in package.json from:

"start": "tsc && concurrently \"npm run tsc:w\" \"npm run lite\" "

To:

"start": "concurrently \"npm run tsc:w\" \"npm run lite\" "

It really helped.

Dextrorotation answered 17/4, 2017 at 18:25 Comment(0)
S
5

This answer is in relation to the excellent Pluralsight course "Angular 2 Fundamentals" by Jim Cooper.

If like me you are having trouble getting started running the command npm start on a Windows 10 machine then I suggest the following:

Start git bash as administrator (follow the steps in the video) Navigate to the project directory (ng2-fundamentals) and then type the following commands:

npm config get registry

npm cache clean

npm install

Once the installation is complete you will need to modify the get-shell.js file located in the spawn-default-shell module inside the node_modules folder as follows:

Change the following:

const DETECT_SH_REGEX = /sh$/;

to this:

const DETECT_SH_REGEX = /sh/;

Note the $ removed from the end of the sh string (credit to the original author of this fix alfian777 who posted the solution on github)

Save the file and then go to your git bash console and type npm start

You shouldn't see any errors now and the localhost page will start up in your default browser (alternatively open your browser and navigate to http://localhost:8808/).

Sarena answered 28/5, 2017 at 14:34 Comment(0)
B
3

None of these answers helped with Ubuntu. Finally I ran across a solution from John Papa (lite-server's author).

On Ubuntu 15.10 the Angular 2 Quick Start sprang to life after running this at the terminal:

echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p

Apparently it increases the number of available File Watches.

Answer Source: https://github.com/johnpapa/lite-server/issues/9

Brina answered 25/2, 2016 at 19:41 Comment(0)
J
3

I encountered this same issue. However, none of the above answers were proper solutions for me. It turns out it was due more to my dev environment then any of the versions of things.

Since I used Visual Studio Code, I set up a build task in VSC to compile TypeScript as a watcher. This was the issue. VSC had already started a NPM task for TSC and so when executing the tutorial's 'start' script, it was having issues with the fact that VSC was still running tsc -w.

I stopped the task in VSC and reran the 'start' script and it worked just fine.

Solution A: Stop and npm Start

  • VSC Command>Tasks: Terminate running tasks
  • Terminal $ npm start

After that to bring everything working together I change the start script to just start the server and not actually launch TSC.

Solution B: Change npm start script

  • Replace

    "start": "concurrent \"npm run tsc:w\" \"npm run lite\" "

  • with

    "start": "npm run lite"

Solution C: Just run the lite server command

`npm run lite`
Jujutsu answered 3/6, 2016 at 22:4 Comment(0)
M
3

I solved my issue with the Quick Start program by following below link.

Angular 2 QuickStart Live-server error

Change the Package.json Scripts Settings

"start": "tsc && concurrently \"npm run tsc:w\" \"npm run lite\",

to:

"start": "concurrently \"npm run tsc:w\" \"npm run lite\" ",
Micheal answered 7/8, 2016 at 15:22 Comment(0)
G
2

This answer is for Windows 10 users only and as you'll see below, I suspect the problem is happening only for those users:

To find out what is happening, you can run the command on PowerShell and it will tell you what is the actual problem:

PS C:\Users\Laurent-Philippe> tsc && concurrently "tsc -w" "lite-server"
At line:1 char:5
+ tsc && concurrently "tsc -w" "lite-server"
+     ~~
The token '&&' is not a valid statement separator in this version.
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : InvalidEndOfLine

Basically, the message explains that the token "&&" is not yet valid with Windows 10. And for those wondering, the same command replacing && with &, informed us that the ampersand operator is reserved for future use:

 (&) character is not allowed. The & operator is reserved for future use; wrap an ampersand in double quotation marks ("&") to pass it as part of a string.

Conclusions:

  • if you want to manually launch this command from the powershell, you can use this instead:

    tsc "&" concurrently "tsc -w" "lite-server"

  • if you want to launch your application with npm start, replace the start line in your package.json by:

    "start": "tsc & concurrently \"tsc -w\" \"lite-server\" "

  • alternatively, the answer of user60108 also works because he is not using the ampersand:

    "start": "concurrently \"npm run tsc:w\" \"npm run lite\" "

Grasmere answered 30/6, 2017 at 21:9 Comment(0)
L
1
  1. In devDependencies typescript is 1.7.3 but you have 1.7.5 fix common one.
  2. Import your js files in the correct order in index.html. for more info refer this repository https://github.com/pkozlowski-opensource/ng2-play/blob/master/index.html or refer to my repository here

    https://github.com/MrPardeep/Angular2-DatePicker

index.html

<script src="node_modules/angular2/bundles/angular2-polyfills.js"></script>
    <script src="node_modules/es6-shim/es6-shim.min.js"></script>
    <script src="node_modules/systemjs/dist/system.src.js"></script>

    <script>
        System.config({
                    defaultJSExtensions: true,
                    map: {
                        rxjs: 'node_modules/rxjs'
                    },
                    packages: {
                        rxjs: {
                        defaultExtension: 'js'
                      }
                    }
                });
    </script>
    <script src="node_modules/angular2/bundles/angular2.dev.js"></script>
    <script src="node_modules/rxjs/bundles/Rx.js"></script>
    <script src="node_modules/angular2/bundles/router.dev.js"></script>
    <script src="node_modules/angular2/bundles/http.dev.js"></script>

<script>
    System.import('dist/bootstrap');
</script> 
Lilybel answered 17/12, 2015 at 14:9 Comment(4)
Thanks for your replay but it doesn't solve my problem :)Metric
than as @Eric said check your node version it should between 4*5 and npm version should between 2*3. or post your project structure it will help me to find out the problem.Lilybel
Thank you! This worked for me. This link in particular: github.com/pkozlowski-opensource/ng2-play/blob/master/…Arresting
your welcome :) this link is very usefull for startup in angular2 beta0.0.Lilybel
M
1

It's most likely that your NPM version is old, i recently had this on a developer machine at work, type:

npm -v

If it's anything less than the current stable version, and you can just update your Node.js install from here https://nodejs.org/en/ :)

Maddy answered 11/4, 2016 at 8:30 Comment(0)
A
1

This worked me, put /// <reference path="../node_modules/angular2/typings/browser.d.ts" /> at the top of bootstraping file.

For example:-

In boot.ts

/// <reference path="../node_modules/angular2/typings/browser.d.ts" />
import {bootstrap} from 'angular2/platform/browser'
import  {AppComponent} from './app.component'

bootstrap(AppComponent);

Note:- Make sure you have mention the correct reference path.

Amherst answered 22/4, 2016 at 9:56 Comment(0)
I
0

Try this:

  1. Install Latest versions npm/nodejs I purged my npm installation
  2. After that, install tsd npm install -g tsd
  3. Then clone https://github.com/johnpapa/angular2-tour-of-heroes.git
  4. Finally npm i and npm start
Iconoscope answered 8/2, 2016 at 0:47 Comment(0)
G
0

Installing the packages globally is one way to do it, but this restricts you to using the same version across all projects in which they are used.

Instead, you can prefix your npm scripts with ./node_modules/.bin. In your case, the package.json would look like this:

{
  "name": "reservationsystem",
  "version": "0.0.1",
  "scripts": {
    "tsc": "./node_modules/.bin/tsc",
    "tsc:w": "npm run tsc -w",
    "lite": "./node_modules/.bin/lite-server",
    "start": "./node_modules/.bin/concurrent \"npm run tsc:w\" \"npm run lite\" "
  },
  "dependencies": {
    "a2-in-memory-web-api": "~0.1.0",
    "angular2": "2.0.0-beta.3",
    "es6-promise": "^3.0.2",
    "es6-shim": "^0.33.3",
    "reflect-metadata": "0.1.2",
    "rxjs": "5.0.0-beta.0",
    "systemjs": "0.19.17",
    "zone.js": "0.5.11"
  },
  "devDependencies": {
    "concurrently": "^1.0.0",
    "lite-server": "^2.0.1",
    "typescript": "^1.7.5"
  }
}

I think npm is supposed to supply the ./node_modules/.bin in front of each "script" command that's in that directory by default, which is why the original package.json looked the way it did. I am not sure if that feature is in every release of npm, or if there's some config setting you're supposed to specify. It'd be worth looking into!

Gavin answered 4/4, 2016 at 17:36 Comment(0)
A
0

I had the same problem, we both forgot to include the 's' on components here:

import  {AppComponent} from './app.component'

Should be:

boot.js:

import {bootstrap} from 'angular2/platform/browser'
import  {AppComponent} from './app.components'

bootstrap(AppComponent);
Anthelmintic answered 24/5, 2016 at 6:3 Comment(1)
this is not true, following the example, there should be no 's' on app.componentAfc
C
0

I had the same error on OS X (node v6.2.0 and npm v3.9.3 installed with homebrew) and it was not solved by any of the above. I had to add full paths to the commands being run by concurrently.

In package.json, I changed this:

"start": "tsc && concurrently \"npm run tsc:w\" \"npm run lite\" ",

to this:

"start": "tsc && concurrently \"/Users/kyen/.node/bin/npm run tsc:w\" \"/Users/kyen/.node/bin/npm run lite\" ",

You will, of course, need to update the correct paths based on where your node global binaries are stored. Note that I didn't need to add the path to the first tsc command. It seems only concurrently needs the full paths specified.

Cana answered 28/5, 2016 at 14:37 Comment(0)
E
0

I met the same error. And after a lot search, I finally found this one: Angular2 application install & run via package.json. Then I tried to replace

"scripts": { "start": "tsc && concurrently \"npm run tsc:w\" \"npm run lite\" ", "lite": "lite-server", "postinstall": "typings install", "tsc": "tsc", "tsc:w": "tsc -w", "typings": "typings" }, to

"scripts": { "start": "concurrently \"npm run tsc:w\" \"npm run lite\" ", "lite": "lite-server", "postinstall": "typings install", "tsc": "tsc", "tsc:w": "tsc -w", "typings": "typings" },

Hope it helps who get the same error.

PS: My error is not the same as Tomasz, which is my npm version is 3.7.3 and node version is 5.9.1.

Eberta answered 5/6, 2016 at 12:21 Comment(0)
C
0

Uninstall all existing node packages. Update node and npm.As it is given in documentation as at least node v5.x.x and npm 3.x.x else it will cause errors .

Do npm clean. Then do npm install, npm start.

This solved the issue for me.

Clock answered 24/6, 2016 at 5:55 Comment(1)
this is not true, the documentation stats at least node v4.x.x. angular.io/docs/ts/latest/…Afc
P
0

If you use proxy it may cause this error:

  1. npm config set proxy http://username:pass@proxy:port

  2. npm config set https-proxy http://username:pass@proxy:port

  3. create a file named .typingsrc in your application folder that includes:

    • proxy = (value on step 1)
    • https-proxy = (value on step 1)
  4. run npm cache clean

  5. run npm install
  6. run npm typings install
  7. run npm start

it will work then

Perpetuate answered 12/7, 2016 at 7:4 Comment(1)
Nope, stille getting: error TS5023: Unknown compiler option 'moduleResolution'.Ridgepole
A
0

Add the following section in tsconfig.json:

"compilerOptions": {
"target": "es5",
"module": "system",
"moduleResolution": "node",
"sourceMap": true,
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"removeComments": false,
"noImplicitAny": false
}

and in \node_modules\typings\typings.json:

"ambientDependencies": {
  "es6-shim": "github:DefinitelyTyped/DefinitelyTyped/es6-shim /es6-shim.d.ts#6697d6f7dadbf5773cb40ecda35a76027e0783b2"
}

After these changes it works for me.

Asben answered 1/8, 2016 at 10:50 Comment(0)
F
0

For Ubuntu 16.x users, installing latest version 5.x solves my issue in ubuntu

curl -sL https://deb.nodesource.com/setup_5.x | sudo -E bash -
sudo apt-get install -y nodejs
Foeman answered 16/9, 2016 at 23:19 Comment(0)
C
0

Seemingly there is more than one way in which angular2-quickstart can fail to start. I had the same issue running Angular2 version 2.0.0 under a fresh install of node 6.6.0 / npm 3.10.3 on Windows 7. In my case running npm start dumped a ton of typescript errors:

c:\git\angular2-quickstart>npm start

> [email protected] start c:\git\angular2-quickstart
> tsc && concurrently "npm run tsc:w" "npm run lite"

node_modules/@angular/common/src/directives/ng_class.d.ts(46,34): error TS2304: Cannot find name 'Set'.
node_modules/@angular/common/src/pipes/async_pipe.d.ts(39,38): error TS2304: Cannot find name 'Promise'.
(...)

This issue is discussed in angular quickstart issue #63, "typings" not being installed correctly. That ticket gives the fix as

$ ./node_modules/.bin/typings install

which worked for me. (I'm not sure of the "right" way to do this yet.)

Chromatid answered 21/9, 2016 at 13:39 Comment(0)
T
0

I the quick start tutorial I went through the steps up until npm start. Then i got this error. Then I deleted the node_modules folder under angular-quickstart and ran npm install again. Now it works.

Trinitrotoluene answered 3/10, 2016 at 14:53 Comment(0)
T
0

Please make sure the names are correct, thus changing component in boot.js to components. enter image description here

Thirsty answered 21/11, 2016 at 13:27 Comment(0)
B
0

Go to https://github.com/npm/npm/issues/14075 address. And try juaniliska's answer. Maybe help you.

npm config get registry

npm cache clean

npm install

Balzer answered 27/1, 2017 at 7:37 Comment(0)
I
0

In the package.json file, I removed the line which had "prestart": "npm run build". This appears to be a blocking command, and occurs before (npm) start, thus preventing the other start commands.

Indent answered 16/5, 2017 at 4:53 Comment(0)
A
0

Change start in angular.json to either "start": "ng serve --host 0.0.0.0" or "start": "lite-server" and run.Also check if you've installed angular/cli properly or not.

Asarum answered 30/7, 2018 at 11:45 Comment(0)
R
-1

In my case ,I just needed to add a dummy .ts file.So I created a test.ts file with no contents and ran npm start to solve the problem.

Rhythmandblues answered 30/3, 2017 at 11:45 Comment(0)
W
-2

Just: npm install -g lite-server

And then relaunch: npm start

Wordsworth answered 11/3, 2016 at 17:21 Comment(0)

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