February 2019
Beginner
694 pages
18h 4m
English
Content preview from Mastering TypeScript 3 - Third Edition
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The module keyword
To test this JavaScript ErrorHelper closure using TypeScript, we will need an HTML page that includes both the error_helper.js file, and a TypeScript generated JavaScript file. Assuming that our TypeScript file is called ErrorHelperTypeScript.ts, our HTML page would then be as follows:
<!DOCTYPE html>
<html>
<head>
<title></title>
<script src="error_helper.js"></script>
<script src="ErrorHelperTypeScript.js"></script>
</head>
<body>
</body>
</html>
This HTML is very simple, and includes both the existing error_helper.js JavaScript file and the TypeScript-generated ErrorHelperTypeScript.js file.
Within the ErrorHelperTypeScript.ts file, let's use the ErrorHelper, as follows:
window.onload = () => { var failureMessage = ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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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.
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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.