JSON with Javascript variable

I would like to parse a varialbe name into a JSON string:

JSON:

{
    "items": [
        {
            "id": "2000",
            "butt开发者_开发百科ons": [{
                "text": systemvar.continue,
            }]
        }
}

systemvar.continue is defined in Javascript.

How do I write the JSON code to use the Javascript variable?

Any ideas?

Best Kurt

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If systemvar.continue is defined in JavaScript, then make your JSON valid like this:

{
    "items": [
        {
            "id": "2000",
            "buttons": [{
                "text": "continue", // <-- only pass the property name
            }]
        }
}

And then access the "continue" property of systemvar using square bracket notation.

var result = systemvar[ json.items[0].buttons[0].text ];

Of course this is hardcoded and assumes your parsed JSON is referenced in a variable called json. I assume you're traversing the structure, and will come across text:"continue" at some point. When you get there, plug it in as the property name.

// in traversal
systemvar[ val.text ];

---

I'd also suggest that you avoid the word continue since it's a reserved word, though it will work with a string in square brackets.

---

JSON is a safe, restricted subset of JavaScript's syntax. If you want to allow any JavaScript syntax, including that which is potentially unsafe, use eval() instead of JSON.parse().

---

I think what you can use is JSONP.

The client-side would have this html code:

<script>
function readData(json_arr) {
    //`json_arr` will be the javascript array.
    //do whatever you want to do with the array here.
}
</script>
<script src="your_server.example.com/getData?jsonp=readData"></script>

And the server would return:

readData(
{
    "items": [
        {
            "id": "2000",
            "buttons": [{
                "text": systemvar.continue,
            }]
        }
    }
)

Note that this means that your returned "JSON array" is automatically executed by the browser's javascript engine.