save object local storage code example
Example 1: javascript store object in local storage
var person = { "name": "billy", "age": 23};
localStorage.setItem('person', JSON.stringify(person));
var retrievedPerson = JSON.parse(localStorage.getItem('person'));
Example 2: save object in localstorage shows [object Object]
Looking at the Apple, Mozilla and Mozilla again documentation, the functionality seems to be limited to handle only string key/value pairs.
A workaround can be to stringify your object before storing it, and later parse it when you retrieve it:
var testObject = { 'one': 1, 'two': 2, 'three': 3 };
localStorage.setItem('testObject', JSON.stringify(testObject));
var retrievedObject = localStorage.getItem('testObject');
console.log('retrievedObject: ', JSON.parse(retrievedObject));