November 2015
Intermediate to advanced
129 pages
2h 36m
English
Content preview from Etudes for ClojureScript
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Chapter 2. Interacting with JavaScript and Web Pages
Since ClojureScript compiles to JavaScript, you need to have a way to interact with native JavaScript and with web pages. In this chapter, you will discover five different ways to do this:
- Direct use of JavaScript
- The Google Closure library
- The Dommy library
- The Domina library
- The Enfocus library
Note
All of these methods are fairly “old school.” As of this writing, all the Cool Kids™ are using libraries such as Facebook’s React to handle the user interface. I still think it is useful to have knowledge of the older methods, as they might sometimes be the right tool to solve a problem. Chapter 5 describes how to work with React.
You’ll be doing the same task with each of these: calculating the number of hours of daylight based on a latitude and Julian date, as in “Étude 1-5: More Practice with def and let”. Here is the relevant HTML:
<!DOCTYPE html><html><head><title>Daylight Minutes</title><metahttp-equiv="Content-Type"content="text/html; charset=utf-8"/></head><body><h1>Daylight Minutes</h1><p>Latitude:<inputtype="text"size="8"id="latitude"/>°<br/>Day of year:<inputtype="text"size="4"id="julian"/><br/><inputtype="button"value="Calculate"id="calculate"/></p><p>Minutes of daylight:<spanid="result"></span></p><scriptsrc="out/project_name.js"type="text/javascript"></script></body></html>
I suggest you create a new project for each of these études and copy the preceding HTML into the ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.