Chapter 4 User InterfaCe DesIgn NativeScript NativeScript creates the native application iOS and Android Apps with Angular. It provides the abstractions needed to access the underlying native platforms; for example, it provides a JavaScript API that translates application JavaScript code into native (iOS or Android) gestures API calls. It provides modules to access native device and platform capabilities. As shown in Figure 4-9, it provides Native Mobile application building capability to the angular Technology stack. Karma-Mocha-Chai Testing a web application is not as simple as testing a back-end application because you have to test front-end code on multiple browsers and their versions. Karm, Mocha, and Chai help you to test your code on multiple browsers. Karma runs the test, whereas Mocha and Chai are used to write the test. Karma allows you to test your code on browsers and devices; it starts the browser and runs the test on it. Chai and Mocha provide an assertion library that can be integrated with any JavaScript testing framework. They provide testing capability to the ATS. Jasmine Jasmine is a behavior-driven development framework for testing Java Script code. It is used to test behavior of the functionality written in JavaScript. It has simple syntax so that you can easily write test cases. Webpack Webpack is a static module bundler. When Webpack processes your application, it internally builds a dependency graph that maps every module yours project needs and generates one or more bundles. It provides application-building capability to both the Angular technology stack (ATS) and React technology stack (RTS). Gulp Gulp is used as a default build tool for UI (presentation) and themes development. It helps in automating build tasks like building CSS, HTML, and ECMAScript along with other tasks like minification, watching changes in source code, linting for errors, etc. 136