ajax调用后防止页面刷新

Question

我有一个引导表单，我使用 ajax 调用将信息保存到 json 文件中。

我的问题是，当我按下提交按钮时，页面似乎在调用后刷新（在单击提交按钮后执行），这是我绝对想避免的。

我试图调查这个问题，但我的知识不足，因为我对这些概念没有深入的了解。

这是我的学士学位表格：

<form class="form-horizontal">
      <div class="form-group">
        <label class="control-label col-sm-2" for="name">Full Name:</label>
        <div class="col-sm-2">
          <input type="name" class="form-control" id="nameFull">
        </div>
      </div>
      <div class="form-group">
        <label class="control-label col-sm-2" for="phone">Phone:</label>
        <div class="col-sm-2">
          <input type="phone" class="form-control" id="phoneApp">
        </div>
      </div>
      <div class="form-group">
        <label class="control-label col-sm-2" for="email">Email:</label>
        <div class="col-sm-2">
          <input type="email" class="form-control" id="emailApp">
        </div>
      </div>
      <div class="form-group">
        <label class="control-label col-sm-2" for="date">Date:</label>
        <div class="col-sm-2">
          <input type="date" class="form-control" id="date">

        </div>
      </div>
      <div class="form-group">
        <label class="control-label col-sm-2" for="text">Hour:</label>
        <div class="col-sm-2">
          <select class="form-control" id="time">
            <option value="Time" class="">Time</option>
                        <option value="10am" class="">10:00-10:30</option>
                        <option value="1030am" class="">10:30-11:00</option>
                        </select>
        </div>
      </div>
      <div class="form-group">
        <label class="control-label col-lg-2" for="reason">Reason:</label>
        <div class="col-lg-3">
          <textarea class="form-control" id="reason" name="comments" placeholder="Describe the reason to make an appointment here. Please, include symptoms and any historical data that may help us determine your case." rows="5"></textarea><br>
        </div>
      </div>
      <div class="form-group">
        <div class="col-sm-offset-2 col-sm-10">
          <button id="saveAppt" class="btn btn-default">Submit</button>
        </div>
      </div>
    </form>

这里是 ajax 调用：

$(document).ready(function() {
    $("#saveAppt").click(function(){
         var fullName = $("#nameFull").val();
         var userName = $("#cpr").val();
         var phone = $("#phoneApp").val();
         var email = $("#emailApp").val();
         var date = $("#date").val();
         var time = $("#time").val();
         var reason = $("#reason").val();
         console.log(time);
         console.log(date);
         console.log(reason);

         var jAppointment= {};
        jAppointment.fullName = fullName;
        jAppointment.userName = userName;
        jAppointment.phone = phone;
        jAppointment.email = email;
        jAppointment.date = date;
        jAppointment.time = time;
        jAppointment.reason = reason;

        console.log(JSON.stringify(jAppointment));

      $.ajax
      ({
        type: "GET",
        dataType : 'json',
        async: false,
        url: 'save-appointments.php',
        data: { data: JSON.stringify(jAppointment) },
        success: function () {console.log("Thanks!"); },
        failure: function() {console.log("Error!");}
      });
    });
});

Answer 1

现在提交操作刷新您的页面，点击事件将永远不会引发，因为<button> 标签默认具有type='submit'，只需添加type='button' 类型以避免提交/刷新：

<button type="button" id="saveAppt" class="btn btn-default">Submit</button>

希望这会有所帮助。

$(document).ready(function() {
  $("#saveAppt").click(function(){
    var fullName = $("#nameFull").val();
    var userName = $("#cpr").val();
    var phone = $("#phoneApp").val();
    var email = $("#emailApp").val();
    var date = $("#date").val();
    var time = $("#time").val();
    var reason = $("#reason").val();
    
    console.log(time);
    console.log(date);
    console.log(reason);

    var jAppointment= {};
    jAppointment.fullName = fullName;
    jAppointment.userName = userName;
    jAppointment.phone = phone;
    jAppointment.email = email;
    jAppointment.date = date;
    jAppointment.time = time;
    jAppointment.reason = reason;

    console.log(JSON.stringify(jAppointment));

    $.ajax
    ({
      type: "GET",
      dataType : 'json',
      async: false,
      url: 'save-appointments.php',
      data: { data: JSON.stringify(jAppointment) },
      success: function () {console.log("Thanks!"); },
      failure: function() {console.log("Error!");}
    });
  });
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form class="form-horizontal">
  <div class="form-group">
    <label class="control-label col-sm-2" for="name">Full Name:</label>
    <div class="col-sm-2">
      <input type="name" class="form-control" id="nameFull">
    </div>
  </div>
  <div class="form-group">
    <label class="control-label col-sm-2" for="phone">Phone:</label>
    <div class="col-sm-2">
      <input type="phone" class="form-control" id="phoneApp">
    </div>
  </div>
  <div class="form-group">
    <label class="control-label col-sm-2" for="email">Email:</label>
    <div class="col-sm-2">
      <input type="email" class="form-control" id="emailApp">
    </div>
  </div>
  <div class="form-group">
    <label class="control-label col-sm-2" for="date">Date:</label>
    <div class="col-sm-2">
      <input type="date" class="form-control" id="date">

    </div>
  </div>
  <div class="form-group">
    <label class="control-label col-sm-2" for="text">Hour:</label>
    <div class="col-sm-2">
      <select class="form-control" id="time">
        <option value="Time" class="">Time</option>
        <option value="10am" class="">10:00-10:30</option>
        <option value="1030am" class="">10:30-11:00</option>
      </select>
    </div>
  </div>
  <div class="form-group">
    <label class="control-label col-lg-2" for="reason">Reason:</label>
    <div class="col-lg-3">
      <textarea class="form-control" id="reason" name="comments" placeholder="Describe the reason to make an appointment here. Please, include symptoms and any historical data that may help us determine your case." rows="5"></textarea><br>
    </div>
  </div>
  <div class="form-group">
    <div class="col-sm-offset-2 col-sm-10">
      <button type='button' id="saveAppt" class="btn btn-default">Submit</button>
    </div>
  </div>
</form>
<br><br><br><br><br><br>

Answer 2

在您的点击处理程序中创建对您的事件的引用。

$("#saveAppt").click(function(e){

然后在您的 AJAX 调用之后对该事件调用 preventDefault 函数。

     $.ajax
      ({
        type: "GET",
        dataType : 'json',
        async: false,
        url: 'save-appointments.php',
        data: { data: JSON.stringify(jAppointment) },
        success: function () {console.log("Thanks!"); },
        failure: function() {console.log("Error!");}
      });
      e.preventDefault();