javascript - 使用 Java Servlet 的 SweetAlert

Question

我想暂停表单的提交，这样我就可以在继续之前要求用户确认操作。所以这是我的表格:

            <form action="<%= request.getContextPath()%>/Controller" 
                  method="POST" id="remove_book" 
                  onsubmit="alertBookInfo('return_book')">
            </form>

然后，我使用 SweetAlert 创建了 JavaScript 函数:

function alertInfo(action) {
document.querySelector(action).addEventListener('submit', function (e) {
    var form = this;
    e.preventDefault();
    if (action === "remove_book") {
        swal({
            title: "Remove book?",
            text: "Watch out",
            type: "warning",
            showCancelButton: true,
            confirmButtonColor: "#DD6B55",
            confirmButtonText: "Yes.",
            cancelButtonText: "No.",
            closeOnConfirm: false,
            closeOnCancel: false
        },
        function (isConfirm) {
            if (isConfirm) {
                swal({
                    title: "Deleted.",
                    text: "Done.",
                    type: "success"
                }, function () {
                            form.submit();
                });
            } else {
                swal("Cancelled", "Not done.", "error");
            }
        });
    }
});
}

但出于某种原因，我无法阻止在表单提交时重新加载页面。我做错了什么吗？

PS:我已经尝试在表单中返回 alertInfo() 并从 JS 函数返回 boolean 值，但没有成功。

Answer 1

为什么不这样从表单中调用函数呢，提交表单前会提示alert:

HTML

<form action="<%= request.getContextPath()%>/Controller" method="GET" id="remove_book" onclick="myAlertFunction(event)">
  <input type="submit">
</form>

JavaScript

function myAlertFunction(event) {
  event.preventDefault()
  swal({
      title: "Remove book?",
      text: "Watch out",
      type: "warning",
      showCancelButton: true,
      confirmButtonColor: "#DD6B55",
      confirmButtonText: "Yes.",
      cancelButtonText: "No.",
      closeOnConfirm: false,
      closeOnCancel: false
    },
    function(isConfirm) {
      if (isConfirm) {
        swal({
          title: "Deleted.",
          text: "Done.",
          type: "success"
        }, function() {
          $("#remove_book").submit();
        });
      } else {
        swal("Cancelled", "Not done.", "error");
      }
    });
}

如果你想阻止重新加载，你总是可以使用event.preventDefault()

这是一个例子:JSFiddel