I upgraded Visual Studio 2015 TypeScript extension to 1.7.6, then compile on save stopped working.

First I checked if “Compile on save” was enabled on my 4.5.2 web project properties (TypeScript Build tab):

Then I checked if “Automatically compile TypeScript file which are not part of a project” was enabled (Tools / Options).

Then the TypeScript files still would not compile on save (they were compiled, when the project was build, but not when a TypeScript file was saved.

The solution

I removed the following part in my Web.csproj file:

<PropertyGroup Condition="’$(Configuration)|$(Platform)’ == ‘Debug|AnyCPU’">
    <TypeScriptTarget>ES5</TypeScriptTarget>
    <TypeScriptJSXEmit>None</TypeScriptJSXEmit>
    <TypeScriptCompileOnSaveEnabled>True</TypeScriptCompileOnSaveEnabled>
    <TypeScriptNoImplicitAny>False</TypeScriptNoImplicitAny>
    <TypeScriptModuleKind>None</TypeScriptModuleKind>
    <TypeScriptRemoveComments>False</TypeScriptRemoveComments>
    <TypeScriptOutFile />
    <TypeScriptOutDir />
    <TypeScriptGeneratesDeclarations>False</TypeScriptGeneratesDeclarations>
    <TypeScriptNoEmitOnError>False</TypeScriptNoEmitOnError>
    <TypeScriptSourceMap>True</TypeScriptSourceMap>
    <TypeScriptMapRoot />
    <TypeScriptSourceRoot />
  </PropertyGroup>

Then I added a tsconfig.json file to the root of my project:

tsconfig.json

{
  "compilerOptions": {
    "noImplicitAny": true,
    "sourceMap": true,
    "target": "es5"
  }
}

Don’t now if both steps are needed, but after that, my compile on save started working again.