如何让js知道新创建的html元素

Question

i am creating new html element with js.

$('#write_comment').on('click',function(){
  $(this).html('<textarea> </textarea><button onclick="test()">save</button>');
});

function test(){
 alert('testme');
}

but after these textarea and button were created, if i click on save , nothing happens.

is there any jquery function where i can say. (newly_created_element).find(js_function) ?

that or something with same functionality would be nice to have.

please help.

Answer 1

$('#write_comment').on('click',function(){
  $(this).html('<textarea> </textarea><button id="test">save</button>');
});

$('body').delegate('#test','click',function(){
 alert('testme');
});

Using class

$('#write_comment').on('click',function(){
      $(this).html('<textarea> </textarea><button class="test">save</button>');
    });

    $('body').delegate('.test','click',function(){
     alert('testme');
    });

Answer 2

Create the button seperately:

$('#write_comment').on('click',function(){
  var myButton = $('<button>save</button>').click(function() {
    test();
  });
  $(this).html('<textarea></textarea>').append(myButton);
});

Answer 3

$('#write_comment').on('click',function(){
  $(this).html('<textarea> </textarea><button class="NewlyAdded">save</button>');
});

$(document).on behaves like .live() or delegate() in many ways. And will work for elements that are added later .

$(document).on('click','#write_comment button.newlyAdded',function()
{
  alert('testme');
});