使用流星铁路由器终止导航 [英] Aborting navigation with Meteor iron-router

问题描述

我在Meteor应用程序中有一个(客户端)路由器，并使用{{pathFor}}助手进行链接.

I have a (client-side) router in a Meteor app, and links using the {{pathFor}} helper.

我在用户更改表单字段时在Session中设置dirty标志，并且我想触发警告并允许用户停止导航(如果设置了该标志)，基本上就像onunload处理程序.

I am setting a dirty flag in the Session when the user changes a form field, and I want to trigger a warning and allow the user to stop navigating away from the page if the flag is set, basically like an onunload handler.

我尝试用以下方法做到这一点:

I've tried to do this with:

Router.onBeforeAction(function(pause) {
    var self = this;

    if (!this.ready()) {
        return;
    }

    if(Session.get('dirty')) {
        if(!confirm("Are you sure you want to navigate away?")) {
            pause();
        }
    }
});

但是，在收到提示的同时，我仍处于导航状态.也就是说，pause()似乎并不会停止随后的路由器操作.

However, whilst I get the prompt, I'm still being navigated away. That is, the pause() doesn't seem to stop the subsequent router action, whatever it is.

我在做什么错了?

推荐答案

据我所知，铁路由器API不可能做到这一点.但是，您可以做的是像这样(在您的客户端代码中的某个地方)覆盖Router.go方法:

From what I can tell this isn't possible with the iron-router API. What you could do however is override the Router.go method like so (somewhere in your client code):

var go = Router.go; // cache the original Router.go method
Router.go = function () {
  if(Session.get('dirty')) {
    if (confirm("Are you sure you want to navigate away?")) {
      go.apply(this, arguments);
    }
  } else {
    go.apply(this, arguments);
  }
};

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