How to fix Angular 2 `Uncaught (in promise): TypeError: Cannot read property 'query' of null`?

Question

I\'ve been using the Heroes tutorial in the Angular 2 docs to experiment. However, I\'ve come to a point that I don\'t understand what\'s happening with this error:

Answer 1

Try with these compilerOptions in "tsconfig.json". It worked for me (Version 2.0.0-rc.1 of angular).

"compilerOptions": {
    "target": "es6",
    "module": "commonjs",
    "declaration": false,
    "noImplicitAny": false,
    "removeComments": true,
    "noLib": false,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true   },

I had the same problem with injectables (same error) and the fix did the trick for services but not for http. I modified my options based on a tutorial from ng-book2 and it finally worked.