In the last two blog posts, you have been introduced to the PouchDB NoSQL database. You learned to create a new database, modify documents within that database, and retrieve documents using the allDocs(). Now that you have inserted several documents into your PouchDB database, you might wish to retrieve documents based on data in fields other than the _id property. In this third part of our on-going blog posts on PouchDB, you learn to use the find() plug-in to perform queries on any property in your documents.
As more and more users interact with web applications on their mobile devices, it is becoming increasingly important for us to allow them to work offline. There are many cases where users need to work offline, such as on an airplane, in a remote location where there is no cellular access, or perhaps on board a large ship where Wi-Fi is not available. If you can store data local to your web application, the user can continue to work even without a connection.
Sometimes, you may need to upload files to your server via an Angular application. There are a few different methods you may use. Today, I am going to present a method that works well for small files up to about two megabytes in size. In this blog, you build two projects: a .NET Core Web API project and an Angular project. You build these two projects from scratch using the Angular CLI, .NET Core, and Visual Studio Code editor.
Have you ever need to display your user's location on a map in your web application? HTML 5 adds a geolocation object to help make locating the current user's latitude and longitude quick and easy. Once you have this information, you can use a map API such as Google Maps or Microsoft's Bing Maps to display that latitude and longitude on a graphical map. This blog post explores how to use this new object to get a user's current position.
On April 2, 2018, Paul D. Sheriff released his 17th Pluralsight course entitled: “Angular Security Using JSON Web Tokens.” For a short trailer about this course visit https://bit.ly/2q22iCK.
Fairway Technologies presents a three-part video series on learning about new features in CSS 3. In this three-part series, you’ll learn to use the new layout options in CSS 3 to help you create responsive design layouts without using Bootstrap or any other CSS library. You’ll also learn to manipulate DOM elements using functions, transforms, and transitions. Finally, we’ll show you how to use some of the new styles CSS 3 provides including Media Queries, Pseudo classes, Text effects, Filters, Rounded corners, Drop shadows, and Gradients.
I previously published a couple of articles on how to create a security system in Angular. In those articles, a set Angular classes for users' authentication/authorization were created. You used these classes to login a user and create a set of properties in a class to turn menus and buttons on and off. For each menu, or button, you want to turn on or off, you have a corresponding property in a AppUserAuth class. This works for smaller applications, but for larger applications, you would be best to use a traditional claims-based approach.
In Part 1 of this article, you created a set Angular classes for users and user authentication/authorization. You used these classes to login a user, create a set of properties in a class to turn menus and buttons on and off. In this article you learn to authenticate users against a Web API method. That method returns an authorization object with the same properties as the classes you created in Angular. You are also going to learn to secure your Web API methods using JSON Web Tokens (JWT). You use the [Authorize] attribute to secure your methods, and you learn to add security policies too.CodeProject