jQuery 如何在 JSON 中使用 if 语句？
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How to use if statement inside JSON?
提问by Montaser El-sawy
How to use if statement inside JSON Here is the code: .......................................................................................
如何在 JSON 中使用 if 语句 代码如下：...................................... ……………………………………………………………………………………………………………………………………………………………………………………………………
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;
This is the required result something like this:
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;
Actually this way is wrong and makes a JavaScript syntax error.
实际上这种方式是错误的，并且会导致 JavaScript 语法错误。
采纳答案by Blender
That's regular JavaScript, not JSON. Move the ifstatement outside:
那是普通的 JavaScript，而不是 JSON。将if语句移到外面：
if (page) {
var config = [
{
"name" : "SiteTitle",
"bgcolor" : "",
"color" : "",
"position" : "TL",
"text" : "step1",
"time" : 5000
}, {
"name" : "Jawal",
"bgcolor" : "",
"color" : "",
"text" : "step2",
"position" : "BL",
"time" : 5000
}
];
} else {
var config = [
{
"name" : "Password",
"bgcolor" : "",
"color" : "",
"text" : "step3",
"position" : "TL",
"time" : 5000
}
];
}
回答by Erisan Olasheni
Validating the JSON Schema Draft-07, JSON now supports the if...then...elsekeywords for conditional data representation.
验证JSON Schema Draft-07，JSON 现在支持if...then...else条件数据表示的关键字。
{
"type": "integer",
"minimum": 1,
"maximum": 1000,
"if": { "minimum": 100 },
"then": { "multipleOf": 100 },
"else": {
"if": { "minimum": 10 },
"then": { "multipleOf": 10 }
}
}
回答by james emanon
or perhaps this:
或者这个：
var config =
(page == true) ?
[
{
"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
}
];
回答by DarkCrazy
You can do it this way also (not saying this is the best way but it's another way and could be useful in some scenarios)
你也可以这样做（不是说这是最好的方法，而是另一种方法，在某些情况下可能有用）
let config = [];
if (page) {
config.push({
"name" : "SiteTitle",
"bgcolor" : "",
"color" : "",
"position" : "TL",
"text" : "step1",
"time" : 5000
});
config.push({
"name" : "Jawal",
"bgcolor" : "",
"color" : "",
"text" : "step2",
"position" : "BL",
"time" : 5000
});
} else {
config.push({
"name" : "Password",
"bgcolor" : "",
"color" : "",
"text" : "step3",
"position" : "TL",
"time" : 5000
});
}
