[Edit]

JavaScript - deserialize json to object

1 contributors

2 contributions

0 discussions

8 points

Created by:

lena

714

In JavaScript, it is possible to deserialize (parse/convert) objects to JSON in the following ways.

1. `JSON.parse` method example

Edit

xxxxxxxxxx
 
var studentJson = '{"name":"John","age":25,"todos":["Sleeping","Lectures","Classes","Shopping"]}';
var studentObject = JSON.parse(studentJson);
​
console.log('Name: ' + studentObject.name);
console.log('Age: ' + studentObject.age);
​
console.log('TODOs:');
​
for (const entry of studentObject.todos) {
    console.log('+ ' + entry);
}

Auto running

Note: JSON.parse method has been introduced in ES5.

2. `eval` method example

Edit

xxxxxxxxxx
 
function parseJson(json) {
    let object = null;
    let result = eval( 'object = (' + json + ')' );
​
    return object || result;
}
​
​
var studentJson = '{"name":"John","age":25,"todos":["Sleeping","Lectures","Classes","Shopping"]}';
var studentObject = parseJson(studentJson);
​
console.log('Name: ' + studentObject.name);
console.log('Age: ' + studentObject.age);
​
console.log('TODOs:');
​
for (const entry of studentObject.todos) {
    console.log('+ ' + entry);
}

Auto running

Note: this approach is not recommended if JSON.parse method is available because of security - eval parse and execute all source code - can be dangerous if comes from outside.