爲什麼onclick函數不能在類上工作？

Question

我使用JQuery和Node.js運行Drupal 7。我希望事件發生在div onclick事件中。但是，它不會在類上工作，但如果我使用父分區ID，它將起作用。

是我遇到的麻煩該生產線是：

$(document).ready(function() { 

    $('.chatNickname').click(function(){ 
alert("hello"); 
    }); 

的代碼片段工作在jsfiddle..not確定是什麼問題。 整個代碼如下：

<script src="http://<?php print $_SERVER['SERVER_ADDR'] ?>:8080/socket.io/socket.io.js"></script> 
<script> 
    (function($){ 
    var myNick = 'me'; 
    var newlyJoined = true; 
    var socket = io.connect('http://<?php print $_SERVER['SERVER_ADDR'] ?>:8080'); 

    socket.on('connect', function() { 
     $('#chat').addClass('connected'); 
    }); 

    socket.on('announcement', function (msg) { 
     $('#lines').append($('<p>').append($('<em>').text(msg))); 
    }); 

    socket.on('nicknames', function (nicknames) { 
    $('#nicknames').empty().append($('<span>Online: </span>')); 
     for (var i in nicknames) { 
    $('#nicknames').append($('<div class="chatNickname" id="' + nicknames[i] + '">').text(nicknames[i])); 
     } 
    }); 

    socket.on('user message', message); 
    socket.on('reconnect', function() { 
     $('#lines').remove(); 
     message('System', 'Reconnected to the server'); 
    }); 

    socket.on('reconnecting', function() { 
     message('System', 'Attempting to re-connect to the server'); 
    }); 

    socket.on('error', function (e) { 
     message('System', e ? e : 'A unknown error occurred'); 
    }); 

    socket.on('chat log', function(chatlog) { 
     if (newlyJoined) { 
    var i = 0; 
    for (stamp in chatlog) { 
     if (chatlog[stamp].type == 'user message') { 
     var ts = tstamp(stamp); 
     var nick = chatlog[stamp].nick 
     var msg = chatlog[stamp].msg 
     message(ts, nick, msg); 
     i++; 
     } 
    } 
    if (i > 0) { 
     $('#lines').append($('<hr>')).append($('<small style="text-align:center; display:block; color: #888;">').text('Chat messages posted within the past half hour appear above this line.')).append($('<hr>')); 
     $('#lines').get(0).scrollTop = 10000000;  
    } 
    newlyJoined = false; 
     } 
    }); 

    function message (msg_time, from, msg) { 
     $('#lines').append($('<p>').append($('<small>').text(msg_time)).append($('<b>').text(from), linkify(msg))); 
    } 

    function linkify(inputText) { 
     //URLs starting with http://, https://, or ftp:// 
     var replacePattern1 = /(\b(https?|ftp):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/gim; 
     var replacedText = inputText.replace(replacePattern1, '<a href="$1" target="_blank">$1</a>'); 

     //URLs starting with www. (without // before it, or it'd re-link the ones done above) 
     var replacePattern2 = /(^|[^\/])(www\.[\S]+(\b|$))/gim; 
     var replacedText = replacedText.replace(replacePattern2, '$1<a href="http://$2" target="_blank">$2</a>'); 

     //Change email addresses to mailto:: links 
     var replacePattern3 = /(\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,6})/gim; 
     var replacedText = replacedText.replace(replacePattern3, '<a href="mailto:$1">$1</a>'); 

     return replacedText 
    } 

    function tstamp(stamp) { 
     var currentTime = new Date(); 
     if (typeof stamp != 'undefined') { 
    currentTime.setTime(stamp); 
     } 
     var days = new Array('Sun', 'Mon', 'Tue', 'Wed', 'Thr', 'Fri', 'Sat'); 
     var day = currentTime.getDay(); 
     var hours = currentTime.getHours(); 
     var minutes = currentTime.getMinutes(); 
     if (minutes < 10) { 
    minutes = "0" + minutes; 
     } 
     if (hours > 11) { 
    var ap = 'p'; 
     } 
     else { 
    var ap = 'a'; 
     } 
     if (hours > 12) { 
    hours = hours - 12; 
     } 
     return "["+ days[day] + " " + hours + ":" + minutes + ap + "m] "; 
    } 

    $(document).ready(function() { 

     $('#nicknames .chatNickname').click(function(){ 
    alert("hello"); 
     }); 

     $('input#message').focus(function() { 
    if ($(this).val() == 'Type your chat messages here...') { 
     $(this).val(''); 
    } 
     }); 

     $('input#show-timestamps').click(function() { 
    if ($(this).is(':checked')) { 
     $('#messages p small').show(); 
    } 
    else { 
     $('#messages p small').hide(); 
    } 
     }) 

     socket.emit('nickname', '<?php print $username ?>', function (nick) { 
    if (nick != 'me') { 
     myNick = nick; 
     socket.emit('get log');   
     return $('#chat').addClass('nickname-set'); 
    } 
     }); 

     $('#send-message').submit(function() { 
    message(tstamp(), myNick, $('#message').val()); 
    socket.emit('user message', $('#message').val()); 
    clear(); 
    $('#lines').get(0).scrollTop = 10000000; 
    return false; 
     }); 

     function clear() { 
    $('#message').val('').focus(); 
     }; 

    }); 
    })(jQuery); 
</script> 
<div id="chat"> 
    <div id="messages"> 
    <div id="nicknames"> 
    </div> 
    <div id="lines"> 
    </div> 
    </div> 
    <form id="send-message" autocomplete="off"> 
    <input id="message" type="text" value="Type your chat messages here..." autocomplete="off" /> 
    <button>Send</button> 
    </form> 
</div> 
<small><input id="show-timestamps" type="checkbox" checked="checked" /> Show timestamps</small> 

Answer 1

你」重新使用套接字並在附加點擊處理程序後追加元素。這意味着當設置原始點擊處理程序時，該元素不存在。您需要將事件委託給更高級的元素，如下所示：

$('#nicknames').on('click', '.chatNickname', function(){ 
    alert("hello"); 
}); 

Answer 2

，我可以看到你的動態追加的要素，請試試這個：示例演示：http://jsfiddle.net/CGxyj/

API：.on：http://api.jquery.com/on/

$(document).ready(function() { 

    $('.chatNickname').on('click', function(){ 
     alert("hello"); 
    }); 

}); // this was not closed wither