表格中的多个提交按钮答案

【问题标题】：multiple submit buttons in from table表格中的多个提交按钮
【发布时间】：2021-08-11 13:41:47
【问题描述】：

需要一些帮助和建议。我有一个包含在表格中的表单，并且在每一行上都有一个表单输入和一个提交按钮，我想要做的是从该行捕获用户输入并按下提交按钮。困扰我的一件事通常是捕获表单输入值，我们将传递输入标签中的 name 值并将其传递给后端，在我的情况下它是烧瓶，所以我会做类似 comment = request.form.get('comment_1') 的事情。有人可以帮我弄清楚如何知道单击了哪个按钮和输入名称值标签，以便从该行输入中检索该输入值吗？

我还有一个JSFiddle

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form metohd="POST">
  <table class="table">
    <thead>
      <tr>
        <th scope="col">First</th>
        <th scope="col">Last</th>
        <th scope="col">Handle</th>
        <th scope="col"></th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td>Mark</td>
        <td>Otto</td>
        <td>@mdo</td>
        <td><input class="form-control form-control-sm" type="text"placeholder="Comment" name="comment_1" id="comment_1"></td>
        <td><button type="submit" name="button-1" value="button-1" class="btn btn-primary">Submit</button></td>
        
      </tr>
      <tr>
        <td>Jacob</td>
        <td>Thornton</td>
        <td>@fat</td>
         <td><input class="form-control form-control-sm" type="text"placeholder="Comment" name="comment_2" id="comment_2"></td>
        <td><button type="submit" name="button-2" value="button-2" class="btn btn-primary">Submit</button></td>
      </tr>
      <tr>
        <td>Larry</td>
        <td>the Bird</td>
        <td>@twitter</td>
         <td><input class="form-control form-control-sm" type="text" placeholder="Comment" name="comment_3" id="comment_3"></td>
        <td><button type="submit" name="button-3" value="button-3" class="btn btn-primary">Submit</button></td>
      </tr>
    </tbody>
  </table>
</form>

【问题讨论】：

标签： javascript html jquery forms flask

【解决方案1】：

您可以使用document.activeElement

const myForm = document.forms['my-form']

myForm.onsubmit = e =>
  {
  e.preventDefault()   
  let el_TR = document.activeElement.closest('tr')
    
  if (el_TR)
    {
    let inEl = el_TR.querySelector('input')
    console.clear()
    console.log('input _name:', inEl.name, ', _value:', inEl.value )
    }
  }

-<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.css" rel="stylesheet"/>
 
<form metohd="POST" name="my-form">
  <table class="table">
    <thead>
      <tr>
        <th scope="col">First</th>
        <th scope="col">Last</th>
        <th scope="col">Handle</th>
        <th scope="col"></th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td>Mark</td>
        <td>Otto</td>
        <td>@mdo</td>
        <td><input class="form-control form-control-sm" type="text"placeholder="Comment" name="comment_1" ></td>
        <td><button type="submit" class="btn btn-primary">Submit</button></td>
      </tr>
      <tr>
        <td>Jacob</td>
        <td>Thornton</td>
        <td>@fat</td>
        <td><input class="form-control form-control-sm" type="text"placeholder="Comment" name="comment_2" ></td>
        <td><button type="submit" class="btn btn-primary">Submit</button></td>
      </tr>
      <tr>
        <td>Larry</td>
        <td>the Bird</td>
        <td>@twitter</td>
        <td><input class="form-control form-control-sm" type="text" placeholder="Comment" name="comment_3" ></td>
        <td><button type="submit" class="btn btn-primary">Submit</button></td>
      </tr>
    </tbody>
  </table>
</form>

【讨论】：