Local Storage - HTML5 Demo with Code

Question

I am trying to work with local storage with forms using html5. I am just unable to find a single working demo online. Can anyone find me a good demo and a tutorial that works. My browser is completely supported.

Appreciate all the help. Thanks

Answer 1

Here's a jsfiddle demo

(copy of the associated js code, uses of localStorage are called out in the comments)

//Note that if you are writing a userscript, it is a good idea
// to prefix your keys, to reduce the risk of collisions with other 
// userscripts or the page itself.
var prefix = "localStorageDemo-";

$("#save").click(function () { 
    var key = $("#key").attr('value');
    var value = $("#value").attr('value');
    localStorage.setItem(prefix + key, value);      //******* setItem()
    //localStorage[prefix+key] = value; also works
    RewriteFromStorage();
});

function RewriteFromStorage() {
    $("#data").empty();
    for(var i = 0; i < localStorage.length; i++)    //******* length
    {
        var key = localStorage.key(i);              //******* key()
        if(key.indexOf(prefix) == 0) {
            var value = localStorage.getItem(key);  //******* getItem()
            //var value = localStorage[key]; also works
            var shortkey = key.replace(prefix, "");
            $("#data").append(
                $("<div class='kvp'>").html(shortkey + "=" + value)
                   .append($("<input type='button' value='Delete'>")
                           .attr('key', key)
                           .click(function() {      //****** removeItem()
                                localStorage.removeItem($(this).attr('key'));
                                RewriteFromStorage();
                            })
                          )
            );
        }
    }
}

RewriteFromStorage();