HTML5 Web Application Development By Example Beginner's guide

Time for action – moving tasks within the list

While we're at it, let's add buttons to move tasks up and down in the list. For this we'll add some more code to the addTaskElement() method. First we need to create move-up and move-down buttons, and then add them to the list element along with the delete button.

function addTaskElement(taskName)
{
    var $task = $("<li></li>");
    var $delete = $("<button class='delete'>X</button>");
    var $moveUp = $("<button class='move-up'>^</button>");
    var $moveDown = $("<button class='move-up'>v</button>");
    $task.append($delete)
        .append($moveUp)
        .append($moveDown)
        .append("<span class='task-name'>" + taskName +
                "</span>");
    $("#task-list").append($task);
    
    $delete.click(function() { $task.remove(); });
    $moveUp.click(function() ...