jquery onclick函数未定义 [英] jquery onclick function not defined

问题描述

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，但我似乎仍然无法使其工作。

I have an ajax script and I am trying to post from a function. I am using a onlick href but its not coming up as undefined. This is using wordpress. I have tried to move the code around inside and outside the scope but I still cant seem to get it to work.

    <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：）

推荐答案

当你执行 javascript：submitComment（）时，它正在调用全局函数 submitComment 。由于 submitComment 是在 jQuery（function（$）{...}）函数中定义的，所以它不是全球化的。因此， window.submitComment 是 undefined （因此 undefined不是函数）。

When you do javascript:submitComment() that's calling a the global function submitComment. Since the submitComment is defined in the jQuery(function($) { ... }) function, it is not a global. Therefore, window.submitComment is undefined (hence undefined is not a function).

全局变量存储在窗口对象中。

The globals are stored in the window object.

因此，您可以将 submitComment 公开为全局：

Therefore, you can expose that submitComment as a global:

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

请注意，你应该尽量避免使用全局变量。在这种情况下，你可以通过添加：

Note that you should avoid using globals as much as possible. In this case you can do that by adding:

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

由于您处于某种形式，因此您希望在单击 a 元素时停止默认浏览器行为，方法是使用 return false 在函数结束时。

And since you are in a form, you want to stop the default browser behavior when clicking the a element, by using return false at the end of the function.

这篇关于jquery onclick函数未定义的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！