Svelte.js Introduction

Course Facts

  • 2 day course
  • Our Trainers are Authorised Professionals
  • Live Online or Classroom-based
  • Certificate of completion
  • Maximum class size of 6 for scheduled courses
  • Unlimited support after your course
  • Courses at all levels: Introduction, Intermediate, Advanced and Masterclasses

Course Outline

  • Introducing Svelte.js
  • Fundamental methods in Svelte
  • Building Apps
  • Components
  • Forms and Data Binding

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Svelte is a front-end, open-source JavaScript framework for making interactive webpages. Like React and Vue, Svelte allows developers to create web applications, but with less code, no virtual DOM (Document Object Model). It is also truly reactive. Our course introduces Svelte.js for efficient code and performant frontend applications and user interfaces. Through hands-on examples delegates will gain a thorough understanding of how to build Svelte apps.

Course Outline

Introducing Svelte.js

  • Use cases eg. web applications intended for low-power devices and highly interactive pages or complex visualisations
  • Svelte.js setup and features

Fundamental methods in Svelte

  • Extending HTML by allowing JavaScript expressions in markup and providing directives to use conditions and loops
  • Extending CSS by adding a scoping mechanism and allowing each component to define its own styles

Building Apps

  • Understanding the architecture
  • Breaking problems down
  • Creating components
  • Working with events
  • Using slots


  • Using css in components
  • Attaching events in Svelte
  • Reactive declarations and statements
  • Component and props
  • Component events and component lifecycle
  • Understanding and using Context

Forms and Data Binding

  • Writing interactive forms
  • Validating forms and input
  • Using component binding

Data Management and State

  • Understanding data modelling
  • Creating, updating, and managing stores
  • Writable and readable store
  • Comparing Store and Context
  • Introducing Action
  • Actions: creating and reusing event listeners
  • Passing data across slots

Consuming Web Services

  • Using external APIs
  • Sending, fetching, and transforming data

Routing and Server-Side Rendering

  • How to build navigation
  • Preloading components
  • Lazy Components
  • Fetching and pre-fetching data
  • Syncing stores

Writing Robust Code

  • Separation of concerns
  • Handling errors
  • Unit tests and mock tests

Development and Production

  • The Svelte compiler
  • Understanding the development build
  • Building and deploying an application
  • Protecting data and APIs

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