December 2017
Beginner
372 pages
10h 32m
English
Content preview from TypeScript 2.x By Example
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Transpiled JavaScript from classes
While learning TypeScript, it is important to remember that TypeScript is a superset of JavaScript, and not a new language on its own. Browsers can only understand JavaScript, so it is important for us to understand the JavaScript that is transpiled by TypeScript. TypeScript provides an option to generate JavaScript based on the ECMA standards. You can configure TypeScript to transpile into ES5 or ES6 (ES 2015) and even ES3 JavaScript by using the flag target in the tsconfig.json file. We discussed this setting in Chapter 1, Getting Started with TypeScript. The biggest difference between ES5 and ES6 is with regard to the classes, let, and const keywords which were introduced in ES6.
Even though ES6 has been ...
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