javascript - 我试图在 javascript 中创建带有时间属性的东西，但它不起作用

Question

我想做一个简单的if语句，当时间>7时它会做一些事情，当时间<16时它会做一些事情。在我检查 JShint.com 错误并修复错误后，该功能仍然无法工作，只是什么也不显示，我不知道问题是什么..

下面我写了代码

提前感谢您的帮助!

var avucado =  ["eggs ","avucado ","tommato ","mayonnaise ","pickles ","gamba"];
var eggSalad =  ["eggs ","dill ","mayonnaise ","pickles"];
var tuna =   ["tuna ","coriander ","pickles ","mayonnaise ","gamba"];
var cheeze = ["yellow cheeze ","mayonnaise ","tommato ","cucumber"];
var sausage =["sausage ","mustard ","mayonnaise ","tommato ","pickles"];
var choice1 = ("you chose:");
var choice2 = ("the ingredients of your sandwich are:");
var lunch = input.value;
/*jslint evil: true */  
/*jshint multistr: true */

function food (){
  if (time>7){
switch(lunch){
  case 'avucado':
    document.write(choice1 + " " + 'avucado.'+ "<br /><br />" + " " + choice2 + 
    " " + avucado + ".");
    break;
  case 'egg salad':
    document.write(choice1 + " " + 'Egg salad.'+ "<br /><br />" + " " + choice2 + 
    " " + eggSalad + ".");
    break;
  case 'tuna':
    document.write(choice1 + " " + 'Tuna.'+ "<br /><br />" + " " + choice2 + 
    " " + tuna + ".");
    break;
  case 'yellow cheeze':
    document.write(choice1 + " " + 'Yellow cheeze.'+ "<br /><br />" + " " + choice2 + 
    " " + cheeze + ".");
    break;
  case 'sausage':
    document.write(choice1 + " " + 'Sausage.'+ "<br /><br />" + " " + choice2 + 
    " " + sausage + ".");
    break;
  default:
    document.write("we dont have " + lunch + " yet, but! you can send us \
    mail and we will make that sandwich for you anyway!");
}else{document.write("you'll get you'r order tomorrow by 7AM");
     }
    }
    }

Answer 1

而不是这个:

}else(time<24)

你想要这个:

}else if(time<24)

<小时/>

按照您现在的方式，您的 else 子句不是条件语句。

<小时/>

当我将你的代码放入http://www.jshint.com/时，还有其他代码问题。您确实应该检查错误控制台，因为它可能会向您显示脚本错误。无论如何，下面是代码的修正版本，它通过了 jsHint 的合法 JavaScript 检查:

var avucado = ["eggs ", "avucado ", "tommato ", "mayonnaise ", "pickles ", "gamba"];
var eggSalad = ["eggs ", "dill ", "mayonnaise ", "pickles"];
var tuna = ["tuna ", "coriander ", "pickles ", "mayonnaise ", "gamba"];
var cheeze = ["yellow cheeze ", "mayonnaise ", "tommato ", "cucumber"];
var sausage = ["sausage ", "mustard ", "mayonnaise ", "tommato ", "pickles"];
var choice1 = ("you chose:");
var choice2 = ("the ingredients of your sandwich are:");
var food = function () {

    if (time < 7) {
        var lunch = input.value;
        switch (lunch) {
        case 'avucado':
            document.write(choice1 + " " + 'avucado.' + "<br /><br />" + " " + choice2 +
                " " + avucado + ".");
            break;
        case 'egg salad':
            document.write(choice1 + " " + 'Egg salad.' + "<br /><br />" + " " + choice2 +
                " " + eggSalad + ".");
            break;
        case 'tuna':
            document.write(choice1 + " " + 'Tuna.' + "<br /><br />" + " " + choice2 +
                " " + tuna + ".");
            break;
        case 'yellow cheeze':
            document.write(choice1 + " " + 'Yellow cheeze.' + "<br /><br />" + " " + choice2 +
                " " + cheeze + ".");
            break;
        case 'sausage':
            document.write(choice1 + " " + 'Sausage.' + "<br /><br />" + " " + choice2 +
                " " + sausage + ".");
            break;
        default:
            document.write("we dont have " + lunch +
                " yet, but! you can send us mail and we will make that sandwich for you anyway!");
        }
    } else if (time < 24) {
        document.write("you'll get your order tomorrow by 7AM");
    }
}