Question

$(function() {
    max = 25;
    min = 1;
    var i = 0;

    do {
        var match = Math.ceil(Math.random() * (max - min )- min);

        $('td').each(function() {
            i++;
            console.log( match );   
            if (i == match) {
                $(this).addClass('active');
            }       
        })
    } while ($('td.active').length == 10);
})

My problem is that I do not return 10 random boxes but only one.

Answer 1

Change

} while ( $('td.active').length == 10 );

to

} while ( $('td.active').length < 10 );

while != until

But if you have less than 10 td, you’ll loop indefinitely. And it will very often break as i always grows bigger.

I think you want this :

$(function() {
    var max = 25; // don't forget the "var", if you don't want to declare global variables
    var min = 1;
    do {
        var match = Math.ceil(Math.random() * (max - min )- min);
        $('td').eq(match).addClass('active');
     } while ($('td.active').length < 10);
})