--- title: slug: Web/HTML/Element/dialog tags: - Dialog - HTML - 元素 - 参考 - 可交互 translation_of: Web/HTML/Element/dialog ---
{{HTMLRef}}

HTML <dialog> 元素表示一个对话框或其他交互式组件，例如一个检查器或者窗口。

Content categories Flow content, sectioning root
Permitted content Flow content
Tag omission {{no_tag_omission}}
Permitted parents Any element that accepts flow content
Permitted ARIA roles {{ARIARole("alertdialog")}}
DOM interface {{domxref("HTMLDialogElement")}}

属性

这个元素包含了全局属性。但是 tabindex 特性不能被使用在 <dialog> 元素上。

{{htmlattrdef("open")}}
指示这个对话框是激活的和能互动的。当这个 open 特性没有被设置，对话框不应该显示给用户。

使用备注

Examples

简单的例子

<dialog open>
  <p>Greetings, one and all!</p>
</dialog>

高级示例

当单击“更新详细信息”按钮时，此示例打开一个包含一个表单的弹出对话框。

HTML

<!-- Simple pop-up dialog box containing a form -->
<dialog id="favDialog">
  <form method="dialog">
    <p><label>Favorite animal:
      <select>
        <option></option>
        <option>Brine shrimp</option>
        <option>Red panda</option>
        <option>Spider monkey</option>
      </select>
    </label></p>
    <menu>
      <button value="cancel">Cancel</button>
      <button id="confirmBtn" value="default">Confirm</button>
    </menu>
  </form>
</dialog>

<menu>
  <button id="updateDetails">Update details</button>
</menu>

<output aria-live="polite"></output>

JavaScript

(function() {
  var updateButton = document.getElementById('updateDetails');
  var favDialog = document.getElementById('favDialog');
  var outputBox = document.getElementsByTagName('output')[0];
  var selectEl = document.getElementsByTagName('select')[0];
  var confirmBtn = document.getElementById('confirmBtn');

  // “Update details” button opens the <dialog> modally
  updateButton.addEventListener('click', function onOpen() {
    if (typeof favDialog.showModal === "function") {
      favDialog.showModal();
    } else {
      alert("The dialog API is not supported by this browser");
    }
  });
  // "Favorite animal" input sets the value of the submit button
  selectEl.addEventListener('change', function onSelect(e) {
    confirmBtn.value = selectEl.value;
  });
  // "Confirm" button of form triggers "close" on dialog because of [method="dialog"]
  favDialog.addEventListener('close', function onClose() {
    outputBox.value = favDialog.returnValue + " button clicked - " + (new Date()).toString();
  });
})();

结果

{{EmbedLiveSample("Advanced_example", "100%", 300)}}

Which button was clicked can be determined from favDialog’s {{domxref("HTMLDialogElement.returnValue", "returnValue")}}.

规范

规范 状态 备注
{{SpecName('HTML WHATWG', 'forms.html#the-dialog-element', '<dialog>')}} {{Spec2('HTML WHATWG')}}
{{SpecName('HTML5.2', 'interactive-elements.html#the-dialog-element', '<dialog>')}} {{Spec2('HTML5.2')}} Initial definition

浏览器兼容性

{{Compat("html.elements.dialog")}}

Polyfill

Include this polyfill to provide support for older browsers.

dialog-polyfill

参见