Если json valide js
function IsJsonString(str) {
try {
JSON.parse(str);
} catch (e) {
return false;
}
return true;
}
Joyous Jaguar
function IsJsonString(str) {
try {
JSON.parse(str);
} catch (e) {
return false;
}
return true;
}function isValidJSONString(str) {
try {
JSON.parse(str);
} catch (e) {
return false;
}
return true;
}
//usage
var personJSONString = '{"first_name":"Tony","last_name":"Hawk","age":31}';
if(isValidJSONString(personJSONString)){
//cool we are valid, lets parse
var person= JSON.parse(personJSONString);
}
//extensive check to make sure object is not of string type and not null
function isJson(item) {
item = typeof item !== "string"
? JSON.stringify(item)
: item;
try {
item = JSON.parse(item);
} catch (e) {
return false;
}
if (typeof item === "object" && item !== null) {
return true;
}
return false;
}