Certificación JSA – Certified Associate JavaScript Programmer

Sección 1: Object-Oriented Programming - Objects be able to create objects using a variety of techniques, including literals, constructors and factories; be able to refer to object fields, including nested ones, with both dot notation and bracket notation; be able to alter objects as required, including by adding, deleting, and modifying properties and methods; know how to verify the presence of object fields, enumerate them, and influence the configuration of an object and individual fields (e.g. by blocking the possibility to modify them) understand that objects are stored in variables as references and know how this affects manipulating them in practice (e.g. when comparing objects) know what the context of a method call is and be able to use the keyword this in practice; understand what an object prototype is, what inheritance using a chain of prototypes is and how it can be used, for example, to modify the properties of a group of related objects. Sección 2: Object-Oriented Programming - Classes be able to declare classes, including using the class expression technique, and create objects using them; be able to define properties both from the class methods and directly in the class body; understand the idea of class inheritance and be able to use it in practice; be able to create and use static methods and properties of classes; be able to define getters and setters in classes. Sección 3: Object-Oriented Programming - Built-in Objects be familiar with the basic set of built-in objects of the JS language; understand the difference between primitive types and their corresponding wrapper objects, know the basic properties and methods of these objects, and be able to use autoboxing in practice; be able to handle Array data to an advanced degree, using such methods as filtering, sorting, reducing, mapping, searching, merging, etc. be able to use the destructuring assignment and spread operator in their work with arrays; know in which situations objects of the Map and Set types can be used for data storage as an alternative to Array and Object, declare them, and manipulate their elements; understand the JSON format and be able to convert objects and arrays to and from this format; be able to use the methods provided by the built-in Math object to perform basic mathematical calculations; be able to take advantage of basic regular expressions (using the RegExp type) to parse character strings; be able to extend the built-in JS types with new properties and methods. Sección 4: Advanced Functions know and be able to use in practice such mechanisms related to functions as: Extended Parameter Handling (default parameter values, rest parameter, spread operator), Recursion (closure, first-class functions), Forwarding calls (apply, call, bind), Decorating functions (wrappers, higher order functions) understand the concept of lazy evaluation, and be able to use generators and iterators in practice; clearly understand when asynchronous programming techniques should be used; know how to use callback functions in practice to solve problems that require asynchronous operations; understand the Promise mechanism and be able to use it as an alternative to callback functions; understand the operation of the async function in conjunction with the await keyword and be able to use it to handle promises.