Installation

npm install @ngrx/store --save

yarn add @ngrx/store

If your project is using the Angular CLI 6+ then you can install the Store to your project with the following ng add command :

ng add @ngrx/store@latest

• path - path to the module that you wish to add the import for the StoreModule to.
• project - name of the project defined in your angular.json to help locating the module to add the StoreModule to.
• module - name of file containing the module that you wish to add the import for the StoreModule to. Can also include the relative path to the file. For example, src/app/app.module.ts;
• minimal - By default true, flag to only provide minimal setup for the root state management. Only registers StoreModule.forRoot() in the provided module with an empty object, and default runtime checks.
• statePath - The file path to create the state in. By default, this is reducers.
• stateInterface - The type literal of the defined interface for the state. By default, this is State.

This command will automate the following steps:

1. Update package.json > dependencies with @ngrx/store.
2. Run npm install to install those dependencies.
3. Update your src/app/app.module.ts > imports array with StoreModule.forRoot({}).

ng add @ngrx/store@latest --minimal false

This command will automate the following steps:

1. Update package.json > dependencies with @ngrx/store.
2. Run npm install to install those dependencies.
3. Create a src/app/reducers folder, unless the statePath flag is provided, in which case this would be created based on the flag.
4. Create a src/app/reducers/index.ts file with an empty State interface, an empty reducers map, and an empty metaReducers array. This may be created under a different directory if the statePath flag is provided.
5. Update your src/app/app.module.ts > imports array with StoreModule.forRoot(reducers, { metaReducers }). If you provided flags then the command will attempt to locate and update module found by the flags.

https://ngrx.io/guide/store/install