TypeScript
Course Code: TS
Duration: 2 days
TypeScript Course Overview
TypeScript is a static type checker for JavaScript. Where JavaScript code is prone to failures at runtime, TypeScript flags errors at compile time. Angular applications are written in TypeScript by default, and TypeScript is supported by both React and Vue.
This course deals with all of the core TypeScript features including type inference, explicit typing, primitive types, object types, union types, aliases, interfaces, literal types, narrowing, function types, extending types, generics, type manipulation, and classes.
Exercises and examples are used throughout the course to give practical hands-on experience with the techniques covered.
Course Objectives
This course aims to enable the delegate to build web applications using TypeScript. That is, the delegate ought to be able to write using TypeScript, that which they previously wrote using JavaScript, and in so doing produce code which is better and more robust.
Who will the Course Benefit?
This course is designed for JavaScript developers who are required to build or maintain applications written in TypeScript.
Skills Gained
The delegate will learn and acquire skills as follows:
- Exploit TypeScript to produce better, more robust code
- Define custom types that exploit all of the primitive types, array types, object types, union types, aliases, interfaces, and literal types
- Implement the right type of narrowing for any given situation
- Determine when a function type is needed and construct it correctly using generics where appropriate
- Exploit object type features including modifiers, index signatures, extensions and intersections, generics, and tuple types
- Derive new types from existing types
- Code classes that exploit TypeScript features including access modifiers, interfaces, static members, generics, arrow functions, and abstractions
- Define and describe TypeScript best practices
TypeScript Training Course
Course Introduction
- Administration and Course Materials
- Course Structure and Agenda
- Delegate and Trainer Introductions
Session 1: INTRODUCTION
- TypeScript vs. JavaScript
- Installing TypeScript
- Static type checks
- Non-exception failures
- Compiling TypeScript to JavaScript
- Explicit types
- Strictness flags
Session 2: TYPES
- Primitive types
- Array types
- Variable and function type annotations
- Object types
- Union types
- Aliases
- Interfaces
- Assertions
- Literal types
- null and undefined types
- Other types
Session 3: NARROWING
- What is narrowing?
- Type guards
- Truthiness
- Equality
- Membership
- instanceof
- Assignments
- Control flow analysis
- Type predicates
Session 4: FUNCTIONS
- Function type expressions
- Call signatures
- Construct signatures
- Generic functions
- Generic constraints
- Optional parameters
- Optional parameters in callbacks
- Overloading
- Using this in functions
- Rest parameters and arguments (spread)
- Parameter destructuring
- void return type
TypeScript Training Course
Session 5: MORE ABOUT OBJECT TYPES
- Optional property modifier
- Readonly property modifier
- Index signatures
- Extending types
- Intersecting types
- Aliases or interfaces?
- Generic object types
- Array types
- Tuple types
Session 6: TYPE MANIPULATION
- What is type manipulation?
- Generics
- keyof
- typeof
- Indexed access types
- Conditional types
- Mapped types
- Utility types
Session 7: CLASSES
- Class members
- Fields
- Constructors
- Methods
- Getters and setters
- Class heritage
- extends
- implements
- Member visibility
- Static members
- Generic classes
- Handling this
- Arrow functions
- Parameter properties
- Class expressions
- Abstract classes and members
- Relationships between classes
Session 8: BEST PRACTICES
- General types
- Generics
- The any type
- Callback types
- Function overloads
- Others
- Course technical content is subject to change without notice.
- Course content is structured as sessions, this does not strictly map to course timings. Concepts, content and practicals often span sessions.
Requirements
Delegates attending this course should be familiar with/able to write JavaScript code up to and including features detailed in ES6. This can be achieved via attendance on our JavaScript Developer course.
Pre-Requisite Courses
Further Learning
Course Reviews
Another excellent course from Stu. As usual he went beyond the nuts and bolts of the topic and actually inspired delegates to become better engineers in general. He always demonstrates a huge depth of knowledge, producing complex examples on the fly with now hesitation. Easily the best tutor I've had for these sorts of courses
Christopher - Government - October 2023
Very good course with the course tutor being very knowledgeable and making the course very informative and helpful. Stuart is a great tutor and has a great ability to give a lot of information and knowledge without it feeling too much. I gained a lot of very useful information during the 2 day course very good instructor.
Craig - Lead Software Engineer - Government - October 2023
Stuart was great as always. Delivery spot on, length of course spot on. Really enjoyed, thanks.
Alex - SDET - Government
Stuart has been great and engaging as always - learnt a lot about typescript with very little previous experience
Rokas - Government
Good course, gone from knowing nothing about TS to being confident in applying it in practise.
Leon - Government
A great course with a brilliant instructor. Went at a good pace and was kept interesting. A nice mix of teaching and practical work to try out the things we had learnt.
James - Transport
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