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Mastering React Native by Jacob Friedmann, Eric Masiello

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Describing components in JSX

In recent years, there have been many developments in JavaScript as a language itself. For instance, the new ECMAScript 2015 (ES2015-sometimes called ES6) specification, which defines the next version of JavaScript, is becoming increasingly solidified. If a developer wishes to write in ES2015-and many do-they need to use a program to convert the newer syntax into one that is compatible with the majority of browsers. Additionally, there are a number of JavaScript-like syntaxes, such as CoffeeScript and TypeScript, that ultimately have to be converted to browser-compatible JavaScript in order to function.

With all of these developments and alternate syntaxes, many developers have become accustomed to transforming code ...

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