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Real-World Svelte

You're reading from   Real-World Svelte Supercharge your apps with Svelte 4 by mastering advanced web development concepts

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Product type Paperback
Published in Dec 2023
Publisher Packt
ISBN-13 9781804616031
Length 282 pages
Edition 1st Edition
Languages
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Author (1):
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Tan Li Hau Tan Li Hau
Author Profile Icon Tan Li Hau
Tan Li Hau
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Table of Contents (22) Chapters Close

Preface 1. Part 1: Writing Svelte Components
2. Chapter 1: Lifecycles in Svelte FREE CHAPTER 3. Chapter 2: Implementing Styling and Theming 4. Chapter 3: Managing Props and State 5. Chapter 4: Composing Components 6. Part 2: Actions
7. Chapter 5: Custom Events with Actions 8. Chapter 6: Integrating Libraries with Actions 9. Chapter 7: Progressive Enhancement with Actions 10. Part 3: Context and Stores
11. Chapter 8: Context versus Stores 12. Chapter 9: Implementing Custom Stores 13. Chapter 10: State Management with Svelte Stores 14. Chapter 11: Renderless Components 15. Chapter 12: Stores and Animations 16. Part 4: Transitions
17. Chapter 13: Using Transitions 18. Chapter 14: Exploring Custom Transitions 19. Chapter 15: Accessibility with Transitions 20. Index 21. Other Books You May Enjoy

Introducing the tweened and spring stores

Let us begin our journey into the world of Svelte animations by understanding the concept of tweened and spring stores.

The tweened and spring stores are writable stores that typically hold numeric values. To see the features they offer, let us compare them with a regular numeric variable.

If you are not familiar with writable stores, you can check out Chapter 8, where we extensively explained Svelte stores and creating writable Svelte stores using the built-in writable() function.

Usually, when you have a numeric variable and you update the variable, the value of the variable changes instantly. In the following example, we have a numeric variable, height, whose initial value is 10. When we assign a new value of 20 to the variable, the value of the variable changes to 20 immediately:

let height = 10;
height = 20;

If we use this numeric variable to represent the height of an element or the progress in a progress bar, the height...

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