Is Web Storage enabled by default on supported browsers?

Question

Given this support chart, can I assume that all the supporting browsers listed there enable this feature by default?

If not, what would be the simplest way to check if SessionStorage is available?

Answer 1

if (!window.sessionStorage)

or

if (!("sessionStorage" in window))

How can I detect if Windows local storage is available?

HTML5 Local Storage fallback solutions

http://24ways.org/2009/breaking-out-the-edges-of-the-browser

http://mathiasbynens.be/notes/localstorage-pattern

https://github.com/Modernizr/Modernizr/wiki/HTML5-Cross-browser-Polyfills --> Web Storage