Javascript 有没有办法减少这种代码？

我想在不创建函数的情况下减少代码。那么，有人有解决办法吗

代码如下：

var level = {
                level1 : 3,
                level2 : {
                    win: 3,
                    draw : 2
                },
                level3 : 3,
                level4 : 3,
                level5 : 3,
                level6 : 3
            };          
            switch(levelIndex) {
                case 0:
                    if (winScore >= level.level1) {
                        levelIndex++;
                        this.resetGame();
                        game.state.start('rockpaperscissor');
                    } else {
                        game.state.start('gameover');
                    }
                break;
                case 1:
                    if (winScore >= level.level2.win && drawScore >= level.level2.draw) {
                        levelIndex++;
                        this.resetGame();
                        game.state.start('rockpaperscissor');                       
                    }
                    else {
                        game.state.start('gameover');
                    }
                break;
                case 2:
                    if (winScore >= level.level3) {
                        levelIndex++;
                        this.resetGame();
                        game.state.start('rockpaperscissor');           
                    }
                    else {
                        game.state.start('gameover');
                    }
                break;
                case 3:
                    if (winScore >= level.level4) {
                        levelIndex++;
                        this.resetGame();
                        game.state.start('rockpaperscissor');                       
                    }
                    else {
                        game.state.start('gameover');
                    }
                break;
             }
}

---

由于要执行的代码对于所有

开关…情况…if

条件都完全相同，因此可以将它们与

|

组合成一个

if

（逻辑或）：

---

没有测试，但我认为它应该工作

var lvl = 0; // Whatever level you're testing
if (winScore >= level['level'+lvl] || (level['level'+lvl].win <= winScore && level['level'+lvl].draw <= drawScore)) {
  levelIndex++;
  this.resetGame();
  game.state.start('rockpaperscissor');
} else {
  game.state.start('gameover');
}

var lvl=0；//不管你在测试什么级别
如果（winScore>=等级['level'+lvl]| |（等级['level'+lvl]），赢
var lvl = 0; // Whatever level you're testing
if (winScore >= level['level'+lvl] || (level['level'+lvl].win <= winScore && level['level'+lvl].draw <= drawScore)) {
  levelIndex++;
  this.resetGame();
  game.state.start('rockpaperscissor');
} else {
  game.state.start('gameover');
}