Is it possible to incorporate a combination of es5 and es2015 features in an AngularJS application?

In my workplace, we have a large AngularJS application written in ES5 that is scheduled for migration soon. Rather than jumping straight to a new JS framework like Angular 2+ or React, I am considering taking the first step by migrating the current app to ES2015. However, due to the size of the production app, it would be more feasible to handle this migration gradually.

I have searched for tutorials on using AngularJS with ES2015, but have not found any that address the specific challenge of dealing with a mix of ES5 and ES2015 files.

Additionally, the current ES5 app utilizes lazy loaded routes with ocLazyload + ui-router, and I am uncertain about how this will integrate with ES2015 module loaders such as SystemJS or Webpack.

Does anyone have experience handling this particular scenario? Your insights are much appreciated.

Thank you in advance.

javascriptangularjsecmascript-6

Answer №1

ES2015, also known as ES6, is essentially JavaScript with added features and syntax enhancements. For instance, the `class` keyword in ES6 isn't introducing a new data structure to the language but rather provides syntactic sugar that conceals the underlying prototypal nature of JavaScript. In reality, it's still interpreted as a function.

When developing an application, you have the flexibility to mix ES5 and ES6 code. By compiling your code using tools like Babel or Traceur, you can ensure compatibility and generate valid JavaScript output since ES5 is fully supported.

Although Angular 2 utilizes TypeScript, it's important to note that TypeScript isn't akin to languages like CoffeeScript that compile into JavaScript. Instead, Microsoft defines TypeScript as a superset of JavaScript. Essentially, if you take basic ES5 code and attempt to transpile it using the `tsc` compiler, it should work seamlessly.

Therefore, transitioning from ES5 to ES6 or TypeScript can be done gradually and smoothly. :)

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