javascript - 将数据值从 HTML 传递到 JS

Question

我正在显示多个表单，需要传递一个值，以便我知道哪个上传的项目属于哪个表单。

我需要将数据值从 HTML 表单传递到 jquery 脚本。

我有以下代码 - 您可以看到我包含的数据值 data-uploadValue="some-value" 以及脚本中的 {{ data- uploadValue}}

function uploadFile() {
  var file = _("file1").files[0];
  // alert(file.name+" | "+file.size+" | "+file.type);
  var formdata = new FormData();
  formdata.append("file1", file);
  var ajax = new XMLHttpRequest();
  ajax.upload.addEventListener("progress", progressHandler, false);
  ajax.addEventListener("load", completeHandler, false);
  ajax.addEventListener("error", errorHandler, false);
  ajax.addEventListener("abort", abortHandler, false);
  ajax.open("POST", "/upload/{{ data-uploadValue }}"); //
  ajax.send(formdata);
}

<form id="upload_form" enctype="multipart/form-data" method="post">
  <div class="file has-name is-fullwidth is-info">
    <label class="file-label">
        <input class="file-input" type="file" name="file1" id="file1" value="test_value" data-uploadValue="some-value" onchange="uploadFile()"><br>
        <span class="file-cta">
          <span class="file-icon">
            <i class="fa fa-upload"></i>
          </span>
          <span class="file-label">
            Choose a file…
          </span>
        </span>
        <span class="file-name">
          <div style="color:red;" id="status"></div>
          Supported file types: .png, .jpg, .jpeg and .gif
        </span>
      </label>
    <div style="display:none">
      <p id="loaded_n_total"></p>
      <progress id="progressBar" class="progress" value="0" max="100" style="width:300px;"></progress></div>
  </div>
</form>

我怎样才能实现这个目标？

Answer 1

您可以使用 $('.file-input').data('uploadValue'); 或 $('.file-input') 获取 html 元素的 data 属性').attr('data-uploadValue');

编辑

您可以尝试使用 this 将元素传递给函数，然后在函数中使用 .getAttribute("data-uploadValue")。这将为您提供调用该函数的元素的数据属性。

function uploadFile(element) {
  var file = _("file1").files[0];
  // alert(file.name+" | "+file.size+" | "+file.type);
  var formdata = new FormData();
  formdata.append("file1", file);
  var ajax = new XMLHttpRequest();
  var uploadValue = element.getAttribute("data-uploadValue");
  ajax.upload.addEventListener("progress", progressHandler, false);
  ajax.addEventListener("load", completeHandler, false);
  ajax.addEventListener("error", errorHandler, false);
  ajax.addEventListener("abort", abortHandler, false);
  ajax.open("POST", "/upload/" + uploadValue); //
  ajax.send(formdata);
}

<form id="upload_form" enctype="multipart/form-data" method="post">
  <div class="file has-name is-fullwidth is-info">
    <label class="file-label">
        <input class="file-input" type="file" name="file1" id="file1" value="test_value" data-uploadValue="some-value" onchange="uploadFile(this)"><br>
        <span class="file-cta">
          <span class="file-icon">
            <i class="fa fa-upload"></i>
          </span>
          <span class="file-label">
            Choose a file…
          </span>
        </span>
        <span class="file-name">
          <div style="color:red;" id="status"></div>
          Supported file types: .png, .jpg, .jpeg and .gif
        </span>
      </label>
    <div style="display:none">
      <p id="loaded_n_total"></p>
      <progress id="progressBar" class="progress" value="0" max="100" style="width:300px;"></progress></div>
  </div>
</form>