插入代码时JavaScript“提示”命令不起作用

我试图创建一个项目，搜索一块文本，然后将某些值推送到一个对象的属性中，但是每当我将一个变量放在ingamePrices对象中靠近文本块底部的位置时

var testPrompt = prompt("Let's figure out how this works");
var rawUSDValue = 0.125;
function item(craftGamePrice, craftMarketPrice, uncraftGamePrice, uncraftMarketPrice, strangeGamePrice, strangeMarketPrice, genuineGamePrice, genuineMarketPrice, vintageGamePrice, vintageMarketPrice, unusualGamePrice, unusualMarketPrice, hauntedGamePrice, hauntedMarketPrice, collectorGamePrice, collectorMarketPrice )
{
    this.craftGamePrice = craftGamePrice,
    this.craftMarketPrice = craftMarketPrice,
    this.uncraftGamePrice = uncraftGamePrice,
    this.uncraftMarketPrice = uncraftMarketPrice,
    this.strangeGamePrice = strangeGamePrice,
    this.strangeMarketPrice = strangeMarketPrice,
    this.genuineGamePrice = genuineGamePrice,
    this.genuineMarketPrice = genuineMarketPrice,
    this.vintageGamePrice = vintageGamePrice,
    this.vintageMarketPrice = vintageMarketPrice,
    this.unusualGamePrice = unusualGamePrice,
    this.unusualMarketPrice = unusualMarketPrice,
    this.hauntedGamePrice = hauntedGamePrice,
    this.hauntedMarketPrice = hauntedMarketPrice,
    this.collectorGamePrice = collectorGamePrice,
    this.collectorMarketPrice = collectorMarketPrice
}
var ingamePrices = 
{
};
document.write(testPrompt);

所以是这样的

var testPrompt = prompt("Let's figure out how this works");
var rawUSDValue = 0.125;
function item(craftGamePrice, craftMarketPrice, uncraftGamePrice, uncraftMarketPrice, strangeGamePrice, strangeMarketPrice, genuineGamePrice, genuineMarketPrice, vintageGamePrice, vintageMarketPrice, unusualGamePrice, unusualMarketPrice, hauntedGamePrice, hauntedMarketPrice, collectorGamePrice, collectorMarketPrice )
{
    this.craftGamePrice = craftGamePrice,
    this.craftMarketPrice = craftMarketPrice,
    this.uncraftGamePrice = uncraftGamePrice,
    this.uncraftMarketPrice = uncraftMarketPrice,
    this.strangeGamePrice = strangeGamePrice,
    this.strangeMarketPrice = strangeMarketPrice,
    this.genuineGamePrice = genuineGamePrice,
    this.genuineMarketPrice = genuineMarketPrice,
    this.vintageGamePrice = vintageGamePrice,
    this.vintageMarketPrice = vintageMarketPrice,
    this.unusualGamePrice = unusualGamePrice,
    this.unusualMarketPrice = unusualMarketPrice,
    this.hauntedGamePrice = hauntedGamePrice,
    this.hauntedMarketPrice = hauntedMarketPrice,
    this.collectorGamePrice = collectorGamePrice,
    this.collectorMarketPrice = collectorMarketPrice
}
var ingamePrices = 
{
     var testVariable = "sampleString";
};
document.write(testPrompt);

它会导致提示命令停止工作。有人知道为什么，或者如何修复它吗

var ingamePrices = 
{
     var testVariable = "sampleString";
};

这可能是对以下两件事之一的尝试：对象文字，或您想象中包含testVariable的块语法。对象文字包含键和值，它们不包含任意表达式或变量定义。作为对象文字，这应该是

var ingamePrices =
{
    testVariable: "sampleString"
};

或者，如果确实需要testVariable作为此对象某些内容的上下文，那么：

var testVariable = "sampleString",
    ingamePrices = 
    {
        blah: [testVariable, "a use of testVariable"]
    };

如果您正在寻找块语法和词法变量，那么JavaScript没有它们。它只有全局变量和函数变量。这意味着像这样的案例成为一个自动执行的功能，纯粹是为了提供范围：

var ingamePrices = (function() {
    var testVariable = "sampleString";
    ...
    return { blah: testVariable };
})()

---

无效的javascript:var ingamePrices={var testVariable=sampleString；}；var foo={var是一个语法错误。那么我必须在ingamePrices对象之外生成变量，还是必须执行其他操作？我不知道您在这里尝试执行什么操作。