KAPLAY Docs, onLoading

(action: (progress: number) => void): KEventController

param action- The function that runs when assets are loading.

```
// progress bar
onLoading((progress) => {
    // Background of the bar
    drawRect({
        width: 240,
        height: 40,
        pos: center().add(-120,0),
        color: BLACK,
        anchor: `left,
    });
    // Progress of the bar
    drawRect({
        width: map(progress, 0, 1, 0, 220),
        height: 32,
        pos: center().add(-116, 0),
        color: BLUE,
        anchor: `left
    });
});

returns The event controller.

since v3000.0

group Events