Turning off “Language Service Disabled” error message in VS2017

Question

We are getting the following "Error" message in our MVC web application in Visual studio 2017 Enterprise.

The language service is disabled for project 'C:\Work\Blackhawk Platform\Platform-DEV-Branch\BlackhawkViewer\BlackhawkViewer.csproj' because it included a large number of .js files. Consider excluding files using the 'exclude' section of a 'tsconfig.json' file.

I have tried turning off the Language service in the options but this does not turn the message off:

This is a rather large web application. Is there a way to turn this message off without disabling any files in the tsconfig.json file as it suggests?

Answer 1

To solve this issue do the following:

• Create file in root directory of your project and call it tsconfig.json
• Add this:

{
  "compilerOptions": {
    "allowJs": true, 
    "noEmit": true, 
    "module": "system",
    "noImplicitAny": true,
    "removeComments": true,
    "preserveConstEnums": true,
    "sourceMap": true
  },
  "include": [
    "scripts"
  ],
  "exclude": [

  ],
  "typeAcquisition": {
    "enable": true 
  }
}

Please have a look at the below two links for tsconfig.json explanation, because you may still need to change it according to your setup. This is the only way that worked for me. I hope that will help.
https://www.typescriptlang.org/docs/handbook/tsconfig-json.html
https://developercommunity.visualstudio.com/content/problem/8148/javascript-intellisense-not-working.html

Answer 2

This helped me. You can have a try.

 Go to Tools -> Options -> Text Editor -> JavaScript/TypeScript -> Language Service -> General

and uncheck the box: "Enable the new JavaScript language service.

Answer 3

I have found a solution for this problem.

I reset my userData using:

devenv.exe /resetuserdata

Since doing this the JavaScript settings seem to have persisted and I no longer get the language service error above.

TAKE NOTE: This will reset all your user data and customisations.

Answer 4

I had the same problem after migrating Ionic 1 project from VS2015 to VS2017, first I executed git clean -fxd as sugested above and added this content into tsconfig.json in my ionic project.

{
"compilerOptions": {
    "noImplicitAny": false,
    "noEmitOnError": true,
    "removeComments": false,
    "sourceMap": true,
    "target": "es5"
},
"exclude": [
    "node_modules",
    "www",
    "bower_components"
    ]
}

Answer 5

I solved this problem with following solution:

When you have a JavaScript file that is included in the project.csproj file but isn't in the project folder, this error occurred.

For example I have a .csproj file like below:

 <ItemGroup>
     <Content Include="Scripts\Test.js" />
 </ItemGroup>

The Test.js is included in the .csproj file, but it isn't in the Scripts folder:

Delete the <Content Include="Scripts\Test.js" /> line from the .csproj file and rebuild your project

Answer 6

Solution that worked for me:

1. Go to C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE>.
2. Open command prompt as admin in current folder
3. Ran devenv /Setup
4. Ran devenv /ResetSkipPkgs

Answer 7

In My case I just disable TypeScript support on Visual Studio:

Tools > Extensions and Updates > TypeScript for Microsoft Visual Studio > Disable

After that, just restart Visual Studio, and you are good to go.

Hope this will help,

Answer 8

For me is helping the next solution. I've create a tsconfig.json file in root of the my project with "disableSizeLimit": "true" option.

So, my tsconfig.json file is:

{
  "compilerOptions": {
  "disableSizeLimit": "true"
},
"exclude": []
}

Answer 9

If none of suggested methods worked, try:

npm install -g typescript@latest

and then

Install the lastest version of TypeScript for Visual Studio on Get TypeScript.

Hope this helps...