调用方法是给我代码而不是值(Javascript)

Question

基本上我用一个方法创建了一个对象,该方法在对象中添加了几个属性.但是当我尝试将该方法调用到控制台日志时,它会向我发出代码(这是一个if语句),而不是我希望它返回的值,所以我很困惑!为什么会这样？代码如下:

var Granite = function(ty, gr, th, wi, le, ed, ad){
    this.type = ty;
    this.group = gr;
    this.thickness = th;
    this.width = wi;
    this.length = le;
    this.edgeProfile = ed;
    this.addOns = ad;
    this.groupPrice = function(){
        if (thickness === 20){
            switch(group)
            {
            case 1:
              return 160;
              break;
            case 2:
              return 194;
              break;
            case 3:
              return 244;
              break;
            case 4:
              return 288;
              break;
            case 5:
              return 336;
              break;
            case 6:
              return 380;
              break;
            default:
              return 380;
            }
        }else{
            switch(group)
            {
            case 1:
              return 200;
              break;
            case 2:
              return 242;
              break;
            case 3:
              return 305;
              break;
            case 4:
              return 360;
              break;
            case 5:
              return 420;
              break;
            case 6:
              return 475;
              break;
            default:
              return 475;
            }
        }   
    }
    this.price = function(){
        if(length <= 2000 && length > 1000){
            return ((edgeProfile + groupPrice)*2) - addOns;
        }else if(length <= 3000 && length > 2000){
            return ((edgeProfile + groupPrice)*3) - addOns;         
        }else if(length <= 4000 && length > 3000){
            return ((edgeProfile + groupPrice)*4) - addOns;         
        }else if(length <= 5000 && length > 4000){
            return ((edgeProfile + groupPrice)*5) - addOns;         
        }
    }
}

var granite1 = new Granite("Rosa Porrino", 1, 30, 400, 3200, 30.05, 86.18);

console.log(granite1.groupPrice);

它将groupPrice方法中的完整if语句返回给我

Answer 1

您没有调用该方法,而是向控制台提供函数引用,log().在JavaScript中,您需要使用'()'来调用函数.

这肯定会奏效 console.log(granite1.groupPrice());

在这边.价格

用 this.groupPrice().代替groupPrice

修改了这个,价格方法

 this.price = function(){
        if(length <= 2000 && length > 1000){
            return ((this.edgeProfile + this.groupPrice())*2) - addOns;
        }else if(length <= 3000 && length > 2000){
            return ((this.edgeProfile + this.groupPrice())*3) - addOns;         
        }else if(length <= 4000 && length > 3000){
            return ((this.edgeProfile + this.groupPrice())*4) - addOns;         
        }else if(length <= 5000 && length > 4000){
            return ((this.edgeProfile + this.groupPrice())*5) - addOns;         
        }
    }