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Hands-On JavaScript High Performance

You're reading from   Hands-On JavaScript High Performance Build faster web apps using Node.js, Svelte.js, and WebAssembly

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Product type Paperback
Published in Feb 2020
Publisher Packt
ISBN-13 9781838821098
Length 376 pages
Edition 1st Edition
Languages
Tools
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Author (1):
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Justin Scherer Justin Scherer
Author Profile Icon Justin Scherer
Justin Scherer
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Table of Contents (15) Chapters Close

Preface 1. Tools for High Performance on the Web 2. Immutability versus Mutability - The Balance between Safety and Speed FREE CHAPTER 3. Vanilla Land - Looking at the Modern Web 4. Practical Example - A Look at Svelte and Being Vanilla 5. Switching Contexts - No DOM, Different Vanilla 6. Message Passing - Learning about the Different Types 7. Streams - Understanding Streams and Non-Blocking I/O 8. Data Formats - Looking at Different Data Types Other Than JSON 9. Practical Example - Building a Static Server 10. Workers - Learning about Dedicated and Shared Workers 11. Service Workers - Caching and Making Things Faster 12. Building and Deploying a Full Web Application 13. WebAssembly - A Brief Look into Native Code on the Web 14. Other Books You May Enjoy

Getting fancier – a basic weather application

It should be quite obvious that Svelte has built up its compiler to work with most of the modern ECMAScript standards. One area where they do not provide any sort of wrapper is for fetching data. A good way to add this and see the effects is to build a basic weather application.

A weather application, at its core, needs to be able to take in a zip code or city and spit out information about the current weather for that region. We can also get an outlook for the weather based on this location. Finally, we can also save these choices in the browser, so we can use them when we come back to the application.

For our weather data, we are going to pull from https://openweathermap.org/api. Here, the free service will allow us to get the current weather. On top of this, we will need an input system that will accept the following:

  • The...
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