代码之家 › 专栏 › 技术社区 › Poorna Senani Gamage

如何在单击按钮时显示模态

bootstrap-modal jsp ajax javascript

Poorna Senani Gamage · 技术社区 · 6 年前

我需要打开一个模式使用按钮的 onclick ,但没有成功。我的代码有错误吗?

<button class="btn btn-default" id="addtobag" onclick="addTobag();">Add to Bag</button><br>

情态动词

<div class="modal fade" id="addtobagmodal" tabindex="-1" role="dialog" aria-labelledby="exampleModalCenterTitle" aria-hidden="true">
    <div class="modal-dialog modal-dialog-centered modal-lg" role="document">
        <div class="modal-content">
            <div class="modal-header">
                //mycode
            </div>
            <div class="modal-body">
                //mycode
            </div>
            <div class="modal-footer">
                //mycode
            </div>
        </div>
    </div>
</div>

功能

function addTobag() {
    var request = new XMLHttpRequest();
    request.onreadystatechange = function () {
        if (request.readyState === 4 && request.status === 200) {
            if (request.responseText == "OK") {
                $('#addtobagmodal').modal('show');
            } else {
                alert('error');
            }
        }
    };
    request.open("GET", "myBag", true);
    request.send();
}

3 回复 | 直到 6 年前

saAction 6 年前

问题在于 "myBag" 以及它的内容。

有两个条件你正在检查

if (request.readyState === 4 && request.status === 200)

第二个呢

if (request.responseText == "OK")

这意味着模型只有在两个条件都正确时才会显示。

创建文本文件 myBag.txt 应用OK(仅该文件中的OK)

function addTobag() {
    var request = new XMLHttpRequest();
    request.onreadystatechange = function () {
        if (request.readyState === 4 && request.status === 200) {
            if (request.responseText == "OK") {
                $('#addtobagmodal').modal('show');
            } else {
                alert('error');
            }
        }
        else{
            alert('myBag file not found,  request.readyState = ' + request.readyState);
        }

    };
    request.open("GET", "myBag.txt", true);
    request.send();
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

<div class="modal fade" id="addtobagmodal" tabindex="-1" role="dialog" aria-labelledby="exampleModalCenterTitle" aria-hidden="true">
    <div class="modal-dialog modal-dialog-centered modal-lg" role="document">
        <div class="modal-content">
            <div class="modal-header">
                //mycode
            </div>
            <div class="modal-body">
                //mycode
            </div>
            <div class="modal-footer">
                //mycode
            </div>
        </div>
    </div>
</div>

<button class="btn btn-default" id="addtobag" onclick="addTobag();">Add to Bag</button><br>

在这里确保“myBag.txt文件“”在HTML文件的同一路径上。

注释文件将是:

Avijit Barua 6 年前

您可以尝试编写按钮代码,如

<button type="button" class="btn btn-info btn-lg" data-toggle="modal" data-target="#myModal" onclick="addTobag();>Add to Bag </button>

使用模态函数

   <div class="modal fade" id="myModal" role="dialog">
                        <div class="modal-dialog">
<div class="modal-content">
            <div class="modal-header">
                //mycode
            </div>
            <div class="modal-body">
                //mycode
            </div>
            <div class="modal-footer">
                //mycode
            </div>
        </div>
    </div>
</div>

Shiv Kumar Baghel 6 年前

试试下面的代码。刚加的 js 和 css 用于测试的libs。查看代码中缺少的内容。测试点击测试

  function addTobag() {
    var request = new XMLHttpRequest();
    request.onreadystatechange = function() {
      if (request.readyState === 4 && request.status === 200) {
        if (request.responseText = "OK") {
          $('#addtobagmodal').modal('show');
        } else {
          alert('error');
        }
      }
    };
    request.open("GET", "myBag", true);
    request.send();
  }

  function test() {
    $('#addtobagmodal').modal('show');
  }

<html>

  <head>
    <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/js/bootstrap.min.js"></script>
  </head>
  <body>
    <button class="btn btn-default" id="addtobag" onclick="addTobag();">Add to Bag</button><br>
    <button class="btn btn-default" id="addtobag" onclick="test();">Test modal only</button><br>

  <div class="modal fade" id="addtobagmodal" tabindex="-1" role="dialog" aria-labelledby="exampleModalCenterTitle" aria-hidden="true">
    <div class="modal-dialog modal-dialog-centered modal-lg" role="document">
      <div class="modal-content">
        <div class="modal-header">
          //mycode
        </div>
        <div class="modal-body">
          //mycode
        </div>
        <div class="modal-footer">
          //mycode
        </div>
      </div>
    </div>
  </div>

</body>
</html>