HTMLDialogElement.returnValue

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句法
范例
规范
浏览器兼容性
另请参阅
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这是实验性技术
检查浏览器兼容性表格要小心谨慎在生产中使用这之前。

returnValue 特性为 HTMLDialogElement interface gets or sets the return value for the <dialog> , usually to indicate which button the user pressed to close it.

句法

dialogInstance.returnValue = 'myReturnValue';
var myReturnValue = dialogInstance.returnValue;

值

A DOMString 表示 returnValue of the dialog.

范例

The following example displays a button to open a <dialog> containing a form via the showModal() method. From there, either button will close the dialog.

  <!-- Simple pop-up dialog box containing a form -->
  <dialog id="favDialog">
    <form method="dialog">
      <p><label>Favorite animal:
        <select name="favAnimal" required>
          <option></option>
          <option>Brine shrimp</option>
          <option>Red panda</option>
          <option>Spider monkey</option>
        </select>
      </label></p>
      <menu>
        <button>Cancel</button>
        <button>Confirm</button>
      </menu>
    </form>
  </dialog>
  <menu>
    <button id="updateDetails">Update details</button>
  </menu>
  <script>
    (function() {
      var updateButton = document.getElementById('updateDetails');
      var dialog = document.getElementById('favDialog');
      dialog.returnValue = 'favAnimal';
      function openCheck(dialog) {
        if (dialog.open) {
          console.log('Dialog open');
        } else {
          console.log('Dialog closed');
        }
      }
      function handleUserInput(returnValue) {
        if (returnValue === 'Cancel' || returnValue == null) {
          // User canceled the dialog, do nothing
        } else if (returnValue === 'Confirm') {
          // User chose a favorite animal, do something with it
        }
      }
      // “Update details” button opens the <dialog> modally
      updateButton.addEventListener('click', function() {
        dialog.showModal();
        openCheck(dialog);
        handleUserInput(dialog.returnValue);
      });
    })();
  </script>

注意 : You can find this example on GitHub as htmldialogelement-basic ( see it live also ).

规范

规范	状态	注释
HTML 实时标准 The definition of 'returnvalue' in that specification.	实时标准
HTML 5.1 The definition of 'returnvalue' in that specification.	推荐

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`returnValue`	Chrome 37	Edge 79	Firefox 53 Disabled 53 Disabled 见 bug 840640 . Disabled ). To change preferences in Firefox, visit about:config.	IE No	Opera Yes	Safari No	WebView Android No	Chrome Android No	Firefox Android 53 Disabled 53 Disabled 见 bug 840640 . Disabled ). To change preferences in Firefox, visit about:config.	Opera Android No	Safari iOS No	Samsung Internet Android No

图例

完整支持
不支持
实验。期望将来行为有所改变。

用户必须明确启用此特征。

另请参阅

The HTML element implementing this interface: <dialog> .

元数据

最后修改： 2019 年 3 月 23 日

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句法

值

范例

规范

浏览器兼容性

图例

另请参阅

相关话题