event.preventDefault();不工作

问题描述：

我正在尝试提交表单而不刷新页面，但是event.preventDefault();无法正常工作.到目前为止，这就是我所拥有的

I'm trying to submit a form without refreshing the page, but event.preventDefault(); isn't working. Here's what I have thus far

$('#contactform').on('submit', function() {
    event.preventDefault();
    var that = $(this),
        url = that.attr('action'),
        type = that.attr('method'),
        data = {};
        that.find('[name]').each(function(index, value) {
            var that = $(this),
                name = that.attr('name'),
                value = that.val();
            data[name] = value;
        });
    $.ajax({
        url: url,
        type: type,
        data: data,
        succss: function(response) {
            console.log(response);
        }
    });
});

但是，一旦按下提交按钮，页面仍然会重新加载.有什么建议吗?

But the page still re-loads once the submit button has been pressed. Any suggestions?

更新:主表单页面的代码如下；

Update: The code for the main form page is as follows;

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="<?php echo get_template_directory_uri();?>/ajax/main.js"></script>
<form action="<?php echo get_template_directory_uri(); ?>/ajax/contact.php" method="post" id="contactform">
    <input type="text" name="fname" placeholder="Name" />
    <input type="email" name="email" placeholder="Email" />
    <textarea name="message" id="" cols="30" rows="10" placeholder="Your Message"></textarea>
    <input type="submit" name="Submit" />
</form>

答

您需要将事件作为第一个参数传递给函数.

You need to pass the event to the function as the first parameter.

$('#contactform').on('submit', function(event) {

    event.preventDefault();

...

如果这不起作用，则可能还有其他问题.您需要通过将侦听器包装在.ready():

If that doesn't work, you may have an additional problem. You need to make sure the DOM is ready before binding anything to the form by wrapping your listener in a .ready():

$(document).ready(function() {
    $('#contactform').on('submit', function(event) {
        event.preventDefault();
        ...

event.preventDefault();不工作

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