如何setTimeout来监听来自window.postMessage的消息？

Question

如何在一段时间内收听来自window.postMessage的邮件？

我试图在事件监听器的函数中使用setTimeout，但这不起作用。

我的尝试：

function processMessages(message) {
//setTimeout(function() {
    if (message) {
        console.log("you have a message");
    } else {
        console.log("no messages came"); //<=== I can't get here!
    }
//},10000);
    window.removeEventListener("message", processMessages, false);
}

window.addEventListener("message", processMessages, false);

Answer 1

重新排列代码，将.removeEventListener()调用放在setTimeout()内，该processMessage调用不需要在function processMessages(message) { if (message) { console.log("you have a message"); } else { console.log("no messages came"); //<=== I can't get here! } } window.addEventListener("message", processMessages, false); var timeout = setTimeout(function() { window.removeEventListener("message", processMessages, false); }, 10000); 函数内

def build_device_list(self):
    self.dev_store_len = len(self.device_list_store)
    for i, column_title in enumerate(["Device", "Model", "Serial Number","Size"]):
        self.renderer = gtk.CellRendererText()
        column = gtk.TreeViewColumn(column_title, self.renderer, text=i)
        self.device_list_treeview.append_column(column)
        column.set_sort_column_id(i)
    self.renderer_status = gtk.CellRendererText()
    column_status = gtk.TreeViewColumn("Status",self.renderer_status, text=4, foreground=5)
    self.device_list_treeview.append_column(column_status)
    for x in range(0, self.dev_store_len):
        if self.device_list_store[x][4] == "READ-WRITE":
           self.device_list_store[x][5] = "Red"                
        else:
           self.device_list_store[x][5] = "Green" 
    self.scrollable_treelist = gtk.ScrolledWindow()
    self.scrollable_treelist.set_vexpand(True)
    self.outter_box.pack_start(self.scrollable_treelist,False,True,0)
    self.scrollable_treelist.add(self.device_list_treeview)

Answer 2

你setTimeout事件运行，但你的removeEventListener消息没有延迟。