Why do HTML5 features like localStorage and sessionStorage work in IE7 Emulator mode in IE11?

问题

In Internet Explorer 11, I turn on IE7 Mode and test sessionStorage. I do

sessionStorage.put("someObject",someObject);

and then do

if(sessionStorage != null) {
        console.log(sessionStorage.get("someObject"));
}   

console.log(sessionStorage.get("someObject"));

It actually prints the value of the object out. Why is this?

来源：https://stackoverflow.com/questions/28022370/why-do-html5-features-like-localstorage-and-sessionstorage-work-in-ie7-emulator