javascript - 如何在 JSON 中使用 if 语句？

Question

如何在 JSON 中使用 if 语句下面是代码:..................................................... .....................................

var config =
             [
                {
                    "name"      : "SiteTitle",
                    "bgcolor"   : "",
                    "color"     : "",
                    "position"  : "TL",
                    "text"      : "step1",
                    "time"      : 5000
                },
                {
                    "name"      : "Jawal",
                    "bgcolor"   : "",
                    "color"     : "",
                    "text"      : "step2",
                    "position"  : "BL",
                    "time"      : 5000
                },
                {
                    "name"      : "Password",
                    "bgcolor"   : "",
                    "color"     : "",
                    "text"      : "step3",
                    "position"  : "TL",
                    "time"      : 5000
                }
            ],

            //define if steps should change automatically
            autoplay    = false,
            //timeout for the step
            showtime,
            //current step of the tour
            step        = 0,
            //total number of steps
            total_steps = config.length;

这是所需的结果，如下所示:

    var config =
         [

    if(page==true)  {               
            {
                "name"      : "SiteTitle",
                "bgcolor"   : "",
                "color"     : "",
                "position"  : "TL",
                "text"      : "step1",
                "time"      : 5000
            },
            {
                "name"      : "Jawal",
                "bgcolor"   : "",
                "color"     : "",
                "text"      : "step2",
                "position"  : "BL",
                "time"      : 5000
            }
    } else {
            {
                "name"      : "Password",
                "bgcolor"   : "",
                "color"     : "",
                "text"      : "step3",
                "position"  : "TL",
                "time"      : 5000
            }
    }
        ],

            //define if steps should change automatically
            autoplay    = false,
            //timeout for the step
            showtime,
            //current step of the tour
            step        = 0,
            //total number of steps
            total_steps = config.length;

实际上这种方式是错误的，会导致 JavaScript 语法错误。

Answer 1

验证 JSON Schema Draft-07 , JSON 现在支持用于条件数据表示的 if...then...else 关键字。

这是一个简单的例子:

{
    "type": "integer",
    "minimum": 1,
    "maximum": 1000,
    "if": { "minimum": 100 },
    "then": { "multipleOf": 100 },
    "else": {
        "if": { "minimum": 10 },
        "then": { "multipleOf": 10 }
    }
}

编辑

在上下文中使用OP的示例，可以这样写:

{
    "if": {
        "page": true
    },
    "then": [
        {
            "name": "SiteTitle",
            "bgcolor": "",
            "color": "",
            "position": "TL",
            "text": "step1",
            "time": 5000
        },
        {
            "name": "Jawal",
            "bgcolor": "",
            "color": "",
            "text": "step2",
            "position": "BL",
            "time": 5000
        }
    ],
    "else": [
        {
            "name": "Password",
            "bgcolor": "",
            "color": "",
            "text": "step3",
            "position": "TL",
            "time": 5000
        }
    ]
}