JS -检查网页是否关闭

Question

我试图在网页关闭的过程中触发一个事件。

方案是-一个网站打开一个单独的窗口，用户可以选择最小化。然后，这个最小化的页面等待用户关闭，或者在继续编写脚本之前完全离开主页导航。

我看过jQuery unload()方法，但我认为它不够具体，即它在任何类型的导航(刷新、菜单导航等)上都会触发。

是否可以使用此方法或另一种方法来实现此操作？

Answer 1

这是不可能的，因为没有WINDOW_CLOSED事件，因为像浏览器主窗口一样显示的窗口对象属于底层操作系统的权限。即使在TDI(选项卡式文档接口) (如Microsoft的MDI在浏览器中实现)的情况下，在关闭选项卡时也不会触发任何事件。

Answer 2

var winObj = null；var SixView =函数(a，b，c) { var popUpPageUrl = "../ViewDrawing.aspx?a=“+ $('id*=hdnAhuId').val() + "&compPosition=”+ spobtId + "§ionName=“+ c；winObj = myOpenWindow(popUpPageUrl，"myWin"，winObj)；}

function myOpenWindow(winURL, winName, winObj) {
    var theWin; // this will hold our opened window 

    // first check to see if the window already exists
    if (winObj != null) {
        // the window has already been created, but did the user close it?
        // if so, then reopen it. Otherwise make it the active window.
        if (!winObj.closed) {
            var result = confirm("Do you want to save the changes made in six view drawing ?");
            if (result) {
                saveChanges();
            }
            winObj = window.open(winURL, winName);
            winObj.focus();
            return winObj;
        }
        // otherwise fall through to the code below to re-open the window
    }

    // if we get here, then the window hasn't been created yet, or it
    // was closed by the user.
    theWin = window.open(winURL, winName);
    return theWin;
}