MEAN Cookbook

How to do it...

Let's perform the following steps to add error handling to our blog post service API:

1. First, let's create an error handler in our /src/app/posts/blog-post.service.ts service. Since our error handler is for our promise-based HTTP requests, we will also make this handler return a promise object. This error handler will also parse out an error object from the API that we can inspect for details about our API failure:

...private handleError(error: any): Promise<any> {  let errorJSON = JSON.parse(error._body).error;  console.error('An error occurred', errorJSON);  return Promise.reject(errorJSON || error);}...

2. Next, let's add our new error handler function to our getBlogMetadata method. We'll also want to set our parameters option ...