What could be the reason for the TypeScript compiler not recognizing tsconfig.json?

I recently came across a file from a tutorial that has left me confused due to the inconsistency between documentation, tutorials, and examples:

/scripts/tsconfig.json:

{
    "compilerOptions": {
        "emitDecoratorMetadata": true,
        "experimentalDecorators": true,
        "module": "commonjs",
        "noEmitOnError": true,
        "noImplicitAny": false,
        "outDir": "../wwwroot/appScripts/",
        "removeComments": false,
        "sourceMap": true,
        "target": "es5",
        "moduleResolution": "node"
    },
    "exclude": [
        "node_modules",
        "typings/index",
        "typings/index.d.ts"
    ]
}

Although the options are configured for compilation on save, I am experiencing an issue where the JavaScript output ends up either beneath or attached to the source file:

TypeScript
|
--test.ts 
    |
    --test.js

This creates a cluttered directory structure within /TypeScript. Strangely enough, even though the tsconfig.json file is present, the compiler seems to be ignoring the

"outDir": "../wwwroot/appScripts/"
setting.

While I am still new to Gulp, the Gulp task setup appears correct to me:

var tsProject = ts.createProject('scripts/tsconfig.json');
gulp.task('ts', function (done) {
    //var tsResult = tsProject.src()
    var tsResult = gulp.src([
            "scripts/*.ts"
    ])
        .pipe(ts(tsProject), undefined, ts.reporter.fullReporter());
    return tsResult.js.pipe(gulp.dest('./wwwroot/appScripts'));
});

Answer №1

Compilation is triggered upon saving

Whenever a file is saved, the compiler automatically compiles that specific file along with any files imported within it. To disable this automatic compilation feature, you can turn off the option in your IDE so that the compiler will respect the settings defined in the tsconfig.json file.

It's important to note that when input files are provided via the command line, the tsconfig.json files are not taken into consideration.

If a directory contains a tsconfig.json file, it signifies that the directory is considered as the root of a TypeScript project. This configuration file outlines the root files and compiler options required for compiling the project. There are two main ways in which a project can be compiled:

1. Using tsconfig.json

  1. Executing tsc without specifying any input files will prompt the compiler to search for the tsconfig.json file starting from the current directory and moving up through the parent directories.

  2. Running tsc without providing input files but with a --project (or -p) flag allows you to specify the path to a directory containing a tsconfig.json file.

Take a look at the official TypeScript documentation on tsconfig.json for further details.

Answer №2

One possible explanation could be a specifically designated file

Instead of executing:

npx tsc index.ts

Try running:

npx tsc

If you run the tsc command without specifying any input files, the compiler will automatically search for the tsconfig.json configuration file (c) TypeScript Documentation

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