jquery onclick函数未定义

Question

我有一个ajax脚本,我试图从一个函数发布.我正在使用onlick href,但它不会出现未定义.这是使用wordpress.我试图在范围内外移动代码,但我似乎仍然无法让它工作.

    <div id="live">
    <div class="container">
        <?php the_content(); ?>
        <div id="comment-display">
            <form method="post" action="index.php" id="comments_submit">
                <input type="hidden" id="nameBox" value="<?php echo $_SESSION['name'] ?>" name="name"/>
                <input type="hidden" id="emailBox" name="email" value="<?php echo $_SESSION['email']; ?>"/>
                <textarea id="chatBox" placeholder="Ask a question or make a comment" name="comment" class="form-control"></textarea>
                <a href="javascript:submitComment();" type="submit" id="submit" name="submit" class="btn cardh-bg text-white text-bold margin-top-5"> Submit Comment </a>
            </form>
            <br />
            <div id="displayComments"></div>
        </div>
    </div>
</div>
<script type="text/javascript">
    jQuery(function($) {
        setInterval(function(){
            $.ajax({
                method: "GET",
                url: "<?php echo get_template_directory_uri()?>/get_chat.php"
            }).done(function(html){
                $('#displayComments').html(html);
            });
        }, 2000);

        function submitComment(){
            $.ajax({
                method: "POST",
                url: "template-live.php",
                data: {submitComment:$('#chatBox').val(),submitName:$('#nameBox').val(),submitEmail:$('#emailBox').val()}
            }).done(function(html){
                alert('Your comment has been submitted, and will be displayed after approval.');
                $('#chatBox').val('');
            });
        }
    });
</script>

谢谢 :)

Answer 1

当你这样做时javascript:submitComment(),调用一个全局函数submitComment.由于submitComment在jQuery(function($) { ... })函数中定义,因此它不是全局的.因此,window.submitComment是undefined(因此undefined is not a function).

全局变量存储在window对象中.

因此,您可以将其公开submitComment为全局:

window.submitComment = function () {...}

请注意,您应该尽可能避免使用全局变量.在这种情况下,您可以通过添加:

$("#submit").click(submitComment);
// In this case, you shouldn't declare submitComment as a global anymore

由于您处于表单中,因此您希望在单击该a元素时停止默认浏览器行为,方法return false是在函数末尾使用.