undo button

[13ruce1337]

may have an idea of what we can do to rollback() changes...

references:

• PDO::beginTransaction()

[13ruce1337]

I've rediscovered the way to do undo in javascript:

//number of autosaves
var saves = [];
//arbitrary data from user
var data = $('#userinp');
//paragraph field declaration for ease
var para = $('p');

//function to show and put the text in the stack
function enTer(d) {
    //value of input field
    var f = d.val();
    if(para.text() === null) { 
        $('p').text(f);
    } else {
        saves.push(para.text());
        para.text(f);
    }
}

//function to show the popped value from the stack
function unDo() {

    var x = saves.pop();
    $('p').text(x);
}

//click events
$('#enter').click(function(){enTer(data);});
$('#undo').click(function(){unDo();});

the only problem is I don't like how if this is implemented client side, every undo will trigger a query to the database. there has to be a more efficient way to accomplish this on the server side.

my thoughts are on a save button, but we all know thats how myth works and if the server is unavailable, you cannot save. this is what this page needs to overcome.