使用angular2 @HostListener时onbeforeunload确认对话框未显示 [英] onbeforeunload confirm dialog not showing when angular2 @HostListener is used

问题描述

使用@HostListener挂钩，但未显示确认对话框(询问:是否要离开此页面?...或是否要重新加载此页面?).

Using @HostListener hook, but confirm dialog (that asks: Do you want to Leave this page? ...or Do you want to Reload this page?) is not showing.

该代码有效，但是未显示确认对话框.

The code works, but the confirm dialog is not showing.

这是我拥有的:

@HostListener('window:beforeunload', ['$event'])
public doSomething($event) {
    console.log("do I see this?") // <---- this logs to the console.

    return "something else";
}

但是我看不到:

推荐答案

返回false而不是字符串"something else"可以解决此问题，并显示确认对话框.

returning false instead of the string "something else" fixes the problem and the confirm dialog is shown.

角度绑定很可能会修改返回值

It's quite possible that angular bindings modify the return value

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