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Object Syntax #
Example #
{ "name":"John", "age":30, "car":null }JSON objects are surrounded by curly braces {}.
JSON objects are written in key/value pairs.
Keys must be strings, and values must be a valid JSON data type (string, number, object, array, boolean or null).
Keys and values are separated by a colon.
Each key/value pair is separated by a comma.
You can also access the object values by using bracket ([]) notation:
Example #
myObj = { "name":"John", "age":30, "car":null };
x = myObj["name"]; myObj = { "name":"John", "age":30, "car":null };
for (x in myObj) {
document.getElementById("demo").innerHTML += x;
} In a for-in loop, use the bracket notation to access the property values:
Example #
myObj = { "name":"John", "age":30, "car":null };
for (x in myObj) {
document.getElementById("demo").innerHTML += myObj[x];
} myObj = {
"name":"John",
"age":30,
"cars": {
"car1":"Ford",
"car2":"BMW",
"car3":"Fiat"
}
} You can access nested JSON objects by using the dot notation or bracket notation:
Example #
x = myObj.cars.car2;
// or:
x = myObj.cars["car2"]; myObj.cars.car2 = "Mercedes";
myObj.cars["car2"] = "Mercedes";
