Edit Question - KnowledgeHub

Title Body

I'd like to store a JavaScript object in HTML5 localStorage , but my object is apparently being converted to a string. I can store and retrieve primitive JavaScript types and arrays using localStorage , but objects don't seem to work. Should they? Here's my code: var testObject = { 'one': 1, 'two': 2, 'three': 3 }; console.log('typeof testObject: ' + typeof testObject); console.log('testObject properties:'); for (var prop in testObject) { console.log(' ' + prop + ': ' + testObject[prop]); } // Put the object into storage localStorage.setItem('testObject', testObject); // Retrieve the object from storage var retrievedObject = localStorage.getItem('testObject'); console.log('typeof retrievedObject: ' + typeof retrievedObject); console.log('Value of retrievedObject: ' + retrievedObject); The console output is typeof testObject: object testObject properties: one: 1 two: 2 three: 3 typeof retrievedObject: string Value of retrievedObject: [object Object] It looks to me like the setItem method is converting the input to a string before storing it. I see this behavior in Safari, Chrome, and Firefox, so I assume it's my misunderstanding of the HTML5 Web Storage specification, not a browser-specific bug or limitation. I've tried to make sense of the structured clone algorithm described in 2 Common infrastructure . I don't fully understand what it's saying, but maybe my problem has to do with my object's properties not being enumerable (???). Is there an easy workaround? Update: The W3C eventually changed their minds about the structured-clone specification, and decided to change the spec t

Tags (comma-separated) Cancel