If you specify input files, tsconfig.json is ignored. Check out https://github.com/Microsoft/TypeScript/wiki/tsconfig.json for more info on tsconfig.json.

@types/core-js versin issue https://github.com/Lemoncode/lcFormValidation/commit/ee2b9d739ef5a61d68dbcb37ebea8c35a717a69e

TS2304: Cannot find name 'Map'. Solution: install @types/core-js@0.9.36

Errors like: error TS2687: All declarations of 'value' must have identical modifiers. error TS2687: All declarations of 'prototype' must have identical modifiers. error TS2344: Type 'K' does not satisfy the constraint 'object'. error TS2687: All declarations of '[Symbol.toStringTag]' must have identical modifiers. Solution: in tsconfig.json change ```

"lib": [ "es2015", "dom" ], "types": [ "core-js" ],

``` to ```

"lib": [ "es5", "dom" ], "types": [ "core-js" ],

``` ``` Because: core-js and es6 both are providing es6 type definitions and they're conflicting

``` Uncaught TypeError: Cannot read property 'apply' of undefined zone.js ``` https://github.com/angular/angular-cli/issues/6036 Solution: use zone.js@0.8.5 can solve this problem.

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http://stackoverflow.com/questions/39020022/angular-2-unit-tests-cannot-find-name-describe

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http://stackoverflow.com/questions/40699593/cannot-read-property-injector-of-null-jasmine-angular-2