Week 5 Learning Objectives

NPM

0. Explain the purpose of the package.json file and node_modules directory.

1. Given multiple choices, identify the difference between npm’s package.json and package-lock.json files.

2. Use npm –version to check what version is currently installed and use npm to update itself to the latest version.

3. Use npm init to create a new package and npm install to add a package as a dependency. Then use require to import the module and utilize it in a JavaScript file.

4. Given an existing GitHub repository, clone the repo and use npm to install it’s dependencies.

JavaScript Classes

1. Define a constructor function using ES5 syntax.

2. Define a method on the prototype of a constructor function.

3. Declare a class using ES6 syntax.

4. Define an instance method on a class (ES6).

5. Define a static method on a class (ES6).

6. Instantiate an instance of a class using the new keyword.

7. Implement inheritance using the ES6 extends syntax for an ES6 class.

8. Utilize the super keyword in a child class to inherit from a parent class.

9. Utilize module.exports and require to import and export functions and class from one file to another.

Object-Oriented Programming

1. What are the three pillars of object-oriented programming? What is each pillar’s definition?

2. The SOLID principles - What does each letter stand for? - We talked about the S and L in more depth; know how to apply them and what they mean for us in JavaScript

3. How to apply the Law of Demeter

Assessment Format

• Multiple Choice x10
• Online Coding Environment x2
• VSCode Questions
  • Four .js files that you’ll have to code in
  • Pass the mocha specs for each file (17 specs total)
  • We will use CommonJS for requiring/exporting files
    • We will use module.exports = ClassName, module.exports = { ClassName }, or exports.ClassName = ClassName for exporting. Know the differences and how to use each.
    • We will use const ClassName = require('./file/path') or const { ClassName } = require('./file/path') for importing. Know the differences and how to use each.
  • ES Modules import/export syntax (like what is used in Connect Four) is important for you to know moving forward in the curriculum; it is what allows us to import files in a browser environment. However, you will not be writing it on the assessment as we will only be running specs in a Node environment, where CommonJS is still the default.
    • Fun fact: ES Modules are an experimental feature in Node. Maybe one day they’ll take over as the default! :fingers-crossed: