Question

i had known that html5 added a character that we have local storage at least 5MB to use ; but i can’t find how to do garbage-collection for Local Storage ? the browser will do it for client?

Answer 1

From: Web Storage Editors draft

User agents may prompt the user when quotas are reached, allowing the user to grant a site more space. This enables sites to store many user-created documents on the user’s computer, for instance.

Test to see if limit is breached:

function test(value, name) {
  try {
    localStorage.name = value;
    return true;
  } catch (e) {
    return false;
  }
}

Clear local storage:

localStorage.clear();

It doesn’t look like there’s any garbage collection:

Local Storage Quota test