JavaScript正在製作刪除其左側的功能

Question

如何刪除此內容或有其他方法？

a= function() { 
    this.delete= function() { 
     delete battle; 
    } 
} 
battle = new a(); 
battle.delete(); 

Answer 1

function Foo(battle) { 
    this.battle=battle; 
    this.distroyBattle=function() { 
      this.battle=null; 
    } 
}