jQuery focusin and append problem when textarea focus_问答_开发者

jQuery focusin and append problem when textarea focus

开发者 https://www.devze.com 2022-12-30 19:21 出处：网络

I having problem with append() when the textbox is focus the second time. var i = 1; $(\'textarea\').live(\'focusin\', function(){

I having problem with append() when the textbox is focus the second time.

var i = 1;    
$('textarea').live('focusin', function(){               
        $(this).keydown(function(e){
               var code = e.which;
            if(code === 13) { 
                i++;
                $('#linenumbers').append('<li>' + i + '</li&开发者_StackOverflow中文版gt;');}
    });

This code will append on

tag for each number, 2,3,4,5 (the first li is allread added, that why i=1) But when the user focus out and then focus in again it add two li foreache keydown,

6 and 7 = first keydown 8 and 9 = second keydown

third focus it add 3 numbers, and so on..

How can i check that i just add one li each time you hit enter.

Hope you get the problem!

Edit, the html:

<ul id="linenumbers">
</ul>

<textarea></textarea>

when i hit the enter but i get a new line in textarea then it should be two li in linenumbers.

The main problem is that you add another keydown event handler each time focusin fires. Try this:

$('textarea').live("keydown", function(e){
    var code = e.which;
    if(code === 13) { 
        var prevIndex = parseInt($('#linenumbers li:last').text());
        $('#linenumbers').append('<li>' + prevIndex++ + '</li>');
    }
});