Turning off "Language Service Disabled" error message in VS2017 - visual-studio-2017

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

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 5

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 6

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 7

Solution that worked for me:
Go to C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE>.
Open command prompt as admin in current folder
Ran devenv /Setup
Ran devenv /ResetSkipPkgs

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 latest version of TypeScript for Visual Studio on Get TypeScript.