Question

我正在尝试创建一个提交表单，该表单在单击div后显示，然后检索填写的表单数据。以下是我正在玩一天的测试。变量“term”始终打印为undefined。有人可以帮帮我吗？

$(document).ready(function () {
    $("#nexttable").on("click", "#addcomment", function () {
        document.getElementById("nexttable").innerHTML = "<form  action='maindatabase.php'   id='commentform' method='post'><textarea name='newcomment' placeholder='Start typing your comment... (required)' rows='5' cols='50' required></textarea><br />"
        + "<span id='sbutton'><input type='button' value='Submit'></span><input type='hidden'     name='inputtype' value='3'></form>";
    });
});

$(document).ready(function () {
    $("#nexttable").on("click", "#sbutton", function () {
        var $form = $(this);
        var term = $form.find("input[name='newcomment']").val();
        document.getElementById("nexttable").innerHTML = term;
    });
});

Answer 1

页面上没有名称为newcomment的输入，其为textarea，即

$form.find( "input[name='newcomment']" ).val();

找不到任何东西，应该是

$form.find( "textarea[name='newcomment']" ).val();

事件处理程序中的this也存在问题，因为它是委派的事件处理程序

    $(document).ready(function () {
        $("#nexttable").on("click", "#sbutton", function () {
            var $form = $(this); // <-- HERE, the this I do believe is in reference to the #sbutton element, not anyting to do with a form
            var term = $form.find("input[name='newcomment']").val();
            document.getElementById("nexttable").innerHTML = term;
        });
    });

我会把它改成更像

的东西

    $(document).ready(function () {
        $("#nexttable").on("click", "#sbutton", function () {
            var $form = $(this).parents('form'); // <-- HERE, actually get the form element, which will be a prent of this element clicked ont
            var term = $form.find("input[name='newcomment']").val();
            document.getElementById("nexttable").innerHTML = term;
        });
    });

jquery获取表单数据

1 个答案: