I have this code stored as string:
{
"func": function (field) {
var date = getDate(field);
return date != -1;
},
"somethingElse": "Message",
"somethingElse2": "Message2"
}
Is there a way to convert it to an object? JSON.parse don't allow functions.
As Durendal already said, you have to deliver your function as a string that can be handled by JSON.parse. After that you can call your function with eval:
var string = '{"func":"function (field) {return field;}","somethingElse": "Message","somethingElse2":"Message2"}';
var jsonObject = JSON.parse(string);
var func = eval("("+jsonObject["func"]+")");
document.write(func("abc"));You may also be interested in this question: JavaScript eval() "syntax error" on parsing a function string
Your string shoud look like this :
var string = '{"func":"function (field) {var date = getDate(field);return date != -1;}","somethingElse": "Message","somethingElse2":"Message2"}';
var jsonObject = JSON.parse(string);
First of all, to even store the method like this you need to use replacer function
var text = JSON.stringify(a, function(k,v){
return typeof v == "function" ? v.toString() : v;
})
Now, to get the function back, you need to use the reviver function
JSON.parse(text,function(k,v){
console.log(v);
return typeof v == "string" && v.indexOf("function") == 0 ? new Function(v.substring(v.indexOf("{")+1, v.lastIndexOf("}"))) : v;
})
JSON does not handle functions like this out of the box?
arguments object inside the function, it won't be able to use the variable arguments without evalIf you want to reuse the function you probably need to do it like
var data = {
"func": ["field", "var date = getDate(field); return date != -1;"],
"somethingElse": "Message",
"somethingElse2": "Message2"
},
jData = JSON.stringify(data),
pData = JSON.parse(jData),
func = new Function(pData.func[0],pData.func[1]);
document.write("<pre>" + func + "</pre>");
},with}(),