如何测试Angular2中是否存在路由? [英] How to test if a route exists in Angular2?

问题描述

在Angular2中，如何检查路由是否存在?

In Angular2 how do I check if a route exists?

我有一种方法可以记住未经授权的用户导航到哪个路由.

I have a method that remembers which route to navigate to if the user is not authorised.

登录后，我有:

this.router.navigate([this.authService.redirectUrl]);

但是我只想在redirectUrl引用有效路由的情况下进行导航，例如..

But I only want to navigate IF the redirectUrl references a valid route, something like ..

if (this.authService.redirectUrl is a valid route) {
  this.router.navigate([this.authService.redirectUrl]);
}

有什么办法可以检查吗?

Is there any way to check this?

推荐答案

您可以使用promise方法检查路由是否存在:

You can check if the route exists like that using the promise way :

this.router.navigate(['redirect'])
  .then(data => {
    console.log('Route exists, redirection is done');
  })
  .catch(e => {
    console.log('Route not found, redirection stopped with no error raised');
  });

如果定义了路由，则会发生重定向.如果没有，您可以在catch块中执行一些代码.

If the route is defined, redirection will happen. If not, you can execute some code in the catch block.

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