javascript - JQuery 动态按钮

Question

我有一个输入框。我输入搜索词并返回值。我想要做的是单击带有附加值的动态按钮。但是，当我单击按钮时，它会重新加载页面而不是显示警告框。这只发生在动态按钮上，而不是搜索按钮

$(document).ready(function () {
        $('.cta-button').click(function () {
            event.preventDefault();
            alert("You clicked the button");
        });

        $('#searchButton').click(function () {
            event.preventDefault();
            var varSearch = $('#searchDB').val();
            if (!varSearch) {
                $('#result').html("Please enter a search term");
                return;
            }
            $.ajax({
                contentType: "application/json; charset=utf-8",
                data: 'ID=' + varSearch,
                url: "getTest.ashx",
                dataType: "json",
                success: function (data) {
                    var result = '';
                    $.each(data, function (index, value) {
                        result += '' +
                            '<div class="main-area bg-white">' +
                            '<div class="row">' +
                                '<div class="medium-6 columns">' +
                                    '<button type="submit" id="OfferID_' + index + '" class="cta-button cta-button-icon">Add to Cart</button>' +
                                    '<br />' +
                                '</div>' +
                            '</div>' +
                            '</div>'
                    });
                    if (!result) {
                        result = 'No data were found for ' + varSearch;
                    };

                    $('#result').html(result);
                }
            });
        });
    });


<section>
    <div class="row">
        <div class="medium-4 columns medium-centered">
            <div class="search-rewards">
                <input type="search" id="searchDB" />
                <button type="submit" id="button" class="button"></button>
            </div>
        </div>
    </div>
    <div class="row">
        <div class="medium-6 columns medium-centered">
            <div id="result">

            </div>
        </div>
    </div>
</section>

Answer 1

您缺少 click 函数的 event 参数。没有它，event.preventDefault() 什么都不做。

$('.cta-button').click(function(event) {
    event.preventDefault();
    alert("You clicked the button");
});

更新

要绑定(bind)到动态按钮，您需要按照@MACMAN 的建议使用委托(delegate):

$(document).on('click', '.cta-button', null, function(event){
    event.preventDefault();
    alert("You clicked the button"); 
});