game_h5/Kungfu_sheep/assets/scripts/game/Monster1.ts

import MonsterBase from "./MonsterBase";

const {ccclass, property} = cc._decorator;

@ccclass
export default class Monster1 extends MonsterBase {
    protected get initSpeed():number{
        return Util.random(200,300);
     }

     protected init(): void {
        super.init();
        this.speed = this.initSpeed;
     }
     
}