2 Interactive Application Development
JavaScript is one of the most versatile and widely used programming
languages in modern web development. Its focus on functional programming
allows writing cleaner, more modular, and maintainable code, leveraging
concepts such as pure functions, immutability, and composition.
In addition, JavaScript is fundamental for working with APIs (Application
Programming Interfaces), as it facilitates connecting to and exchanging
data with external services, which is essential for creating dynamic and
real‑time applications.
Combined with its capability for interactive application development,
JavaScript enables the creation of rich and responsive user experiences,
integrating events, animations, and dynamic updates in the interface.
This set of features makes JavaScript an indispensable tool for developers
who want to build modern, scalable, and user‑centered applications.
In today’s market there are various types of APIs that cover countless
purposes. From weather applications, e‑commerce, publishing, news, and
even entertainment, APIs have become essential tools for developers.
Most of these APIs are paid, offering advanced features and technical
support. However, it is also possible to find free APIs on the web that
are extremely useful for training and testing functionalities. These free
APIs allow developers to experiment and create prototypes without
incurring additional costs.
Furthermore, many of them have detailed documentation and active
communities that make their integration and efficient use easier.
2.1 Weather Data. OpenWeatherMap
Example 1. Current weather in a city
2.2 List of Posts. JSONPlaceholder
Example 1. List of Posts. JSONPlaceholder API
2.5 News APIs.
2.5.1 News from NewsAPI
2.5.2 The Guardian Open.
2.6.1 Market & Plant Efficiency (OpenEI)
2.6.2 Laboratorio Nacional de Energía Renovable (NREL)
1) PVWatts Solar Calculator (NREL)
2) Carbon_global Calculator (NREL) in locations within the United States