为什么弹出页面打开时会调用js onunload？

发布于 2024-10-12 15:30:00 字数 1469 浏览 6 评论 0原文

根据文档（我只使用Firefox）：

https ://developer.mozilla.org/en/DOM/window.onunload

当文档已卸载。

但是我下面的代码会触发警报，即使子窗口（即变量名称“win”）刚刚打开，而不是关闭。

alert("failed but still reload:" + win.isSuccess);

"failed but still reload: undefined"

我的注意力是在子窗口关闭时调用 onunload 。我在这里做错了什么？

代码

function showInsertPopup() {
    var ddId = document.getElementById("workRegionDropdown");
    var index = ddId.selectedIndex;
    var workRegionCode = ddId.options[index].value;
    if(workRegionCode != "") {
          var win = window.open(machineFormPopup + "?typeFlag=1&workRegionCode=" + workRegionCode, "window1", "menubar=no, width=700, height=550, toolbar=no");
          win.onunload = function() {
                if(win.isSuccess) {
                      alert("success reload!")
                      getRecordByWorkRegion();
                }
                else {
                      //here gets print out somehow
                      alert("failed but still reload:" + win.isSuccess);
                      getRecordByWorkRegion();
                }
          }//end inner function onunload
     }
 }//end showInsertPopup()

子窗口页面只有简单的js：

window.isSuccess = 1;
window.close();

原文

According to the documentation (I'm only using Firefox) :

https://developer.mozilla.org/en/DOM/window.onunload

The unload event is raised when the
document is unloaded.

But my code below would trigger the alert even though the child window (i.e. variable name "win") has just been opened, not closed.

alert("failed but still reload:" + win.isSuccess);

"failed but still reload: undefined"

My attention is to invoke that onunload when the child window is closed. What am I doing wrong here??

Code

function showInsertPopup() {
    var ddId = document.getElementById("workRegionDropdown");
    var index = ddId.selectedIndex;
    var workRegionCode = ddId.options[index].value;
    if(workRegionCode != "") {
          var win = window.open(machineFormPopup + "?typeFlag=1&workRegionCode=" + workRegionCode, "window1", "menubar=no, width=700, height=550, toolbar=no");
          win.onunload = function() {
                if(win.isSuccess) {
                      alert("success reload!")
                      getRecordByWorkRegion();
                }
                else {
                      //here gets print out somehow
                      alert("failed but still reload:" + win.isSuccess);
                      getRecordByWorkRegion();
                }
          }//end inner function onunload
     }
 }//end showInsertPopup()

Child window page has just simple js: