yichael_moveordiealone/assets/Scripts/Debug/MapSpawner.ts

const {ccclass, property} = cc._decorator;

@ccclass
export class MapSpawner extends cc.Component {

    onLoad():void{
        let prefabInfos:PrefabInfo[] = [];

        for (let i = 0; i < this.node.children.length; i++) {
            let child = this.node.children[i];
            prefabInfos[i] =  {
                name: child.name,
                position: child.getPosition(),
                angle: child.angle,
                size: child.getContentSize()
            };
        }

        console.log(JSON.stringify(prefabInfos))
    }
}