```html
<!-- uses "star" icon for both modes -->
<ion-icon name="star"></ion-icon>

<!-- explicitly set the icon for each mode -->
<ion-icon ios="home" md="star"></ion-icon>

<!-- use a custom svg icon -->
<ion-icon src="/path/to/external/file.svg"></ion-icon>

<!-- set the icon size -->
<ion-icon size="small" name="heart"></ion-icon>
<ion-icon size="large" name="heart"></ion-icon>
```
