Serialization is the process of converting Object state to string. de-Serialization is a process to bring back the object’s state from string. JavaScript provides JSON.stringify() to serialize the object and JSON.parse() method to deserialize.
serialize.html
serialize.html
"text/javascript">
function displayObject(obj) {
document.write("
");
for (prop in obj) {
document.write(prop + " : " + obj[prop] + "
");
}
document.write("
");
}
function Employee(id, firstName) {
this.id = id;
this.firstName = firstName;
}
var emp1 = new Employee(1, "Hari Krishna");
document.write("emp1 details");
displayObject(emp1);
var serializedData = JSON.stringify(emp1);
document.write("
Serialized data is " + serializedData + "
");
var emp2 = JSON.parse(serializedData);
document.write("emp2 details");
displayObject(emp2);
Open above page in browser, you can able to see following text.
emp1 details
id : 1
firstName : Hari Krishna
Serialized data is {"id":1,"firstName":"Hari Krishna"}
emp2 details
id : 1
firstName : Hari Krishna
What data types of JavaScript are supported while serialization?
Currently JSON syntax is a subset of JavaScript syntax. Objects, arrays, strings, finite numbers, true, false, and null are supported and can be serialized and deserialized.
What about special values NaN, Infinity, -Infinity?
NaN, Infinity, and -Infinity are serialized to null.
How the Date objects serialized?
Serialized in the form of ISO-formatted date strings.
Is there any objects that I can’t serialize?
Function, RegExp, and Error objects and the undefined value cannot be serialized (or) deserialized.
Is non-enumerable properties serialzed?
No, only enumerable properties of an object are serialized.
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