问题
There are a couple of different approaches for choosing an HTML5 browser storage (IndexedDB, Web Storage), but from what I read in the spec, the "same origin policy applies".
Is there a way to keep data inside the browser and have it available from both www.domain1.com/myapp1 and www.domain2.com/myapp2?
回答1:
Cross-Document Messaging
You can use a technique called cross-document messaging to accomplish this. There is an article here that outlines how to implement it, but it's basically where two domains talk to each other and pass information instead of directly accessing their data store, which the HTML 5 spec prohibits.
回答2:
That seems fraught with peril, I'm going to say that there's something in the spec to prevent that. Otherwise you could inject bad data into someone elses app.
来源：https://stackoverflow.com/questions/5651068/can-i-use-the-same-html5-browser-storage-across-different-domains