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 proje

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

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,