# Resolving 'import is blacklisted' tslint error for RxJS and Angular

Source: https://tpiros.dev/blog/resolving-import-is-blacklisted-tslint-error-for-rxjs-and-angular

If you're working with Angular and want to use RxJS, you'll need to import the right module. Sometimes, though, tslint throws an error and blocks the import entirely.

# Importing modules from RxJS

Say we want to work with an `Observable`. We'd write something like:

```typescript

```

Looks reasonable. But it throws: `This import is blacklisted, import a submodule instead (import-blacklist)`.

The reason? Importing `rxjs/Rx` actually pulls in the entire `Rx.js` file from `node_modules/Rx/Rx.js`. Open that file and you'll see it requires all of Rx's functionality. Everything. The whole lot.

## Fixing the error

You don't need all of that. The linting error forces you to import only what you actually use. In this case, just `Observable`:

```typescript

```

Always import only the specific pieces you need from RxJS. It keeps your bundles smaller and your linter happy.

### import-blacklist rule

If you're curious, check the `tslint.json` file created by the `angular-cli` for your project. You'll find this:

```typescript
"import-blacklist": [
  true,
  "rxjs",
  "rxjs/Rx"
],

As you can see both the `rxjs` and `rxjs/Rx` imports are blacklisted. Please **do not** modify the linter configuration to fix the error, fix the code instead.
```