message: docs(utilities): add config by component example
diff: @@ -5,6 +5,7 @@ nextText: 'Platform'
  nextUrl: '/docs/utilities/platform'
  contributors:
  - liamdebeasi
  + - mhartington
  ---
  # Config
  @@ -13,7 +14,9 @@ The Config service provides a way to change the properties of components globall
  ## Usage
  -### Basic example
  +### Global
  +
  +#### Basic example
  ```typescript
  import { IonicModule } from '@ionic/angular';
  @@ -34,7 +37,7 @@ import { IonicModule } from '@ionic/angular';
  In the above example, we are disabling the Material Design ripple effect across the app, as well as forcing the mode to be Material Design.
  -### Customizing Animations
  +#### Customizing Animations
  ```typescript
  import { IonicModule } from '@ionic/angular';
  @@ -90,6 +93,24 @@ import { IonicModule } from '@ionic/angular';
  In the above example, we are customizing the "enter" animation for the `ion-toast` component. When an `ion-toast` component is presented from the top, it will slide down instead of fading in.
  +
  +
  +### By Component
  +
  +#### Basic Example
  +
  +```typescript
  +import { Component } from '@angular/core';
  +import { Config } from '@ionic/angular';
  +@Component({...})
  +export class HomePage {
  + constructor(private config: Config) {
  + const text = this.config.get('backButtonText');
  + this.config.set('backButtonIcon', 'home');
  + }
  +}
  +```
  +
  ## Config Options
  Below is a list of config options that Ionic uses.
  