JavaScript does not work after you add new elements

问题

JavaScript does not work after you add new elements ? add more later, but I want you to work for elements how to track down a road I do not know Example;

$(".ui-draggable").draggable();    
$('body').append('<div class="ui-draggable"></div>');

回答1:

Because .draggable() is not dynamic.

Do this:

$(".ui-draggable").draggable();    
$('body').append($('<div class="ui-draggable"></div>').draggable());

Your first line attaches only the elements which were present in the DOM.

It will not check for dynamically added ones.

来源：https://stackoverflow.com/questions/23184447/javascript-does-not-work-after-you-add-new-elements