Window.closed | Web API

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Window.closed read-only property indicates whether the referenced window is closed or not.

句法

const isClosed = windowRef.closed;

值

A 布尔 . Possible values:

true : The window has been closed.
false : The window is open.

范例

Change the URL of a window from a popup

The following example demonstrates how a popup window can change the URL of the window that opened it. Before attempting to change the URL, it checks that the current window has an opener using the window.opener property and that the opener isn't closed:

// Check that an opener exists and is not closed
if (window.opener && !window.opener.closed) {
  window.opener.location.href = 'http://www.mozilla.org';
}

Note that popups can only access the window that opened them.

Refreshing a previously opened popup

In this example the function refreshPopupWindow() 调用 reload() method of the popup's location object to refresh its data. If the popup hasn't been opened yet or the user has closed it a new window is opened.

const popupWindow = null;
function refreshPopupWindow() {
  if (popupWindow && !popupWindow.closed) {
    // popupWindow is open, refresh it
    popupWindow.location.reload(true);
  } else {
    // Open a new popup window
    popupWindow = window.open('popup.html', 'dataWindow');
  }
}

规范

规范	状态	注释
HTML 实时标准 The definition of 'window.closed' in that specification.	实时标准

元数据

最后修改： Feb 3, 2020

在此页

句法

值

范例

Change the URL of a window from a popup

Refreshing a previously opened popup

规范

相关话题