Babel Typescript

If you have existing TypeScript code being ported to React Native, there are one or two caveats to using Babel instead of TypeScript. NET supports stripping out type definitions from. I can see how such functionality could very well satiate needy developers, I can almost see it being a foot-gun for a language that is trying its best to help developers not write "bad" code. Since babel 7 supports TypeScript, the idea is to use TypeScript only for the tooling. In the embedded Terminal (Alt+F12), type: npm install eslint babel-eslint --save-dev. js application using TypeScript and Express. babelrc file in ES2015 projects, we use a tsconfig. Folks looking for the most minimal serverless setup for a modern JS build step, this is article for you!. The latest Tweets from TypeScript Daily (@TypeScriptDaily). ts-node transpiles automatically picking up tsconfig. TypeScript and Babel (the major players in transpiling) both supported ES2015 before it was in the browsers. Covering the basics. Vue is so hot right now and I’ve been thinking of doing a serious project with it since quite a while, so when the opportunity popped up, I hopped in. Announcing TypeScript 3. TypeScript can target commonJS, but async/await is only supported when targeting ES6. Babel7 or TypeScript. log( 'sum: ', sum([1, 2, 3]) ); Запустите код при помощи: babel-node sum. Thus, TypeScript-based projects can continue to benefit from Babel's rich ecosystem and plugins. I tried to run the output of TypeScript in Node, but it didn't work. Babel 能怎么处理 TypeScript 的类型检查?TypeScript 早已能像 Babel 一样输出 ES5 代码,这有什么意义呢?把 Babel 和 TypeScript 合并起来不是会把事情复杂化么? 在几个小时的调研后,我的结论是: TypeScript 和 Babel 是美丽的结合。 让我来告诉你原因。. We talked about a lot of different topics ranging from TypeScript, Angular and Aurelia on the client-side to Node. Menu How to Polyfill missing types in TypeScript 20 July 2017 on JavaScript, Web Development, TypeScript, Node. It's an awesome tool, and it’s been around for quite some time, but nowadays almost every JavaScript developer relies on it, and this will continue going on, because Babel is now indispensable and has solved a big problem for everyone. This tutorial teaches how you can build, structure, test and debug a Node. If you're using Babel or TypeScript >= 1. Daily TypeScript news and articles. If you're interested in know more about TypeScript I recommend you to read this ebook: TypeScript Deep Dive. Babel 7 to the rescue. x) Tutorials. About James Henry. postcssrc) in a module. Compose your own transformation pipeline using existing plugins or write your own. typescript-weekly. A couple of weeks ago, the TypeScript team shared their roadmap in which they described formally adopting ESLint in their repo and working to improve TypeScript compatibility for ESLint:. If you are using previous versions of ESLint, you have to install babel-eslint, typescript-eslint-parser, or eslint-plugin-typescript because ESLint 4. com I've spent some time looking into my options for building an open-source JavaScript library, and I'm struggling on the decision between ES2015. - a-tarasyuk/react-webpack-typescript-babel. When using latest create-react-app (CRA 3. For example, if you call Encore. Once a project gets a bit more complex, a build step might consist of multiple sub tasks. Note that just using the library will compile your Typescript to Javascript, but will not warn you about code that does not type check. Babel looks better, honestly I still prefer to write plain JavaScript because it is easy to incorporate existing JavaScript libraries as well as there is no middle man transforming my code. This pushed for the introduction of native support for classes in the browsers. Hope this is helping you!.  TypeScript follows a less radical approach than Dart – it’s a typed superset of JavaScript and existing JavaScript projects can be converted to TypeScript simply by renaming the source files from *. Once you have Babel setup, install @babel/preset-flow with either Yarn or npm. The plugins perform transformation only on the JSX and tagged template literals. Parcel automatically runs these transforms when it finds a configuration file (e. json for configuration. TypeScript is then transformed to plain JavaScript that is interpreted by browsers or other platforms capable of running JavaScript. Its main purpose is to bundle JavaScript files for usage in a browser, yet it is also capable of transforming, bundling, or packaging just about any resource or asset. If you have big concern on this, the only option is Babel. 0), Babel 7 has native TypeScript 3. NET supports stripping out type definitions from. Net awesomeSites Blogging BOOK Bootstrap Browser c# chrome COM Comp Hardware CSS CUSTOMIZATIONS DarkNet Database Debugging Design Patterns Eclipse Editors&IDEs Excel GameDev Git GitHub Google Graphics H2 HTML hybridApp IIS iOS javascript Jive JQuery Linux Mainframe Memory Misc. @babel/preset-typescript. brunolm/typescript-babel-webpack is a project with just the essential, nothing else. Babel loader is needed to be added as a loader in W ebpack. Babel 7の@babel/typescriptについて。 BabelでTypeScriptのコードをJavaScriptへ変換(型情報を除去)できる。 型チェックやいくつかのTS独自の構文をサポートしないという制限はあるが、Babelのエコシステム上でTSのコードを扱える。. Most projects use Redux alongside React, so it's worth taking a look at how TypeScript works with the Redux. Not to mention Babel puts out releases faster and supports more parts of the spec. If you are using TypeScript with Jest and your tests are making jest. Source code is on GitHub. For some time I've been using TypeScript to emit ES2015 code which I pass onto Babel to transpile to ES "old school". When using latest create-react-app (CRA 3. Jame Kyle's Babel Handbook is a go-to for everything Babel, and if you're interested in Webpack, read the How-To before wading through its. 3" from "typescript": "^1. Compilers/polyfills Desktop browsers Servers/runtimes Mobile; Feature name Current browser ES6 Trans-piler Traceur Babel 6 + core-js 2 Babel 7 + core-js 2. I’ve recently set up TypeScript in an existing codebase that uses Webpack, Mocha and several Babel plugins, including babel-plugin-rewire. Luckily for us they have worked together, and with the introduction of Babel 7 developers will have a much easier time adopting TypeScript and using Babel at the same time. As a replacement for Babel. typescript vs babel-core vs coffee-script - npm trends. In general, TypeScript support on new ES6 feature cannot catch up Babel. It's not going away , but there are modern alternatives. It is common to have exclude: /node_modules/ for JS transpilation rules (e. js and babel-node. Babel 7 does not need ts-loader. I’m also going to sneak in a little TypeScript as well since it’s another option. 4 and forward, you can keep an eye on our feature roadmap page. mariusschulz. babelrc file in ES2015 projects, we use a tsconfig. You can find on the Web a jquery. Babel 7 replaces all the set up described in this blog post with just one command: react-native init MyAwesomeProject --template typescript However, there are some limitations to Babel's TypeScript support, which the blog post above goes into in. js) are not supported. Honestly, it is all a matter of preference. Typescript specification, checker, ide integration is best, but drop typescript compiler and move to babel. To include ts-babel-node as a register function, install this package as a development dependency. To use babel-eslint. In this post, we’ll go through the steps of setting up two basic React components that use ES6 features, use Babel to transpile them to ES5 and bundle them using Webpack. for the browser. What I find interesting is that TypeScript is actually written in TypeScript. TypeScript is the bridge between JavaScript and WebAssembly. Seth’s a great interview host (and a super cool guy to hang out with) and I really enjoyed talking with him about modern technology in today’s world. Over a year ago, we set out to find what the biggest difficulties users were running into with TypeScript, and we found that a common theme among Babel users was that trying to get TypeScript set up was just too hard. Enable the compiler option "experimentalDecorators": true in your tsconfig. Adding Some TypeScript. Get 100% native API access with JavaScript, TypeScript, Vue. I'm targeting ES5 with the Typescript transpiler, which gives me support for ES6 syntax, but doesn't add the polyfills for the enhanced Array features etc of ES6 like Babel does. The goal of this tutorial is to show you how to build a new Node. Typescript allows you to define strict types for your React components, their props and states, as well as event handlers. Babel 7 does not need ts-loader. TypeScript files will be handled by ts-jest, and JavaScript files will be handled by babel-jest. Chris is a software developer at LinkedIn who, at his previous gig, worked on converting one of the largest Ember apps in the world to TypeScript. I feel right at home; Variable assignment can only happen on the left side of the equal. --emitDecoratorMetadata This option isn't supported by an official Babel package since it is a TypeScript-specific addition and not part of the decorators proposal. This is the fourth entry in a short series about creating React/Redux applications with TypeScript. * Running beta of. ts directly. Flow is created by Facebook, written in OCaml. First install the TypeScript compiler and loader by running: npm install--save-dev typescript ts-loader. @babel/preset-typescript. You can see how here. TypeScript and Babel 7 Daniel Rosenwasser August 27, 2018 Aug 27, 2018 08/27/18 Today we're excited to announce something special for Babel users. @zerkalica for what it is worth, I appreciate the spirit of the remarks about us all getting together. gulp-typescript-babel = gulp-babel + gulp-typescript A simple wrapper for gulp-typescript and gulp-babel For compiling from typescript to es2015 to es5, JavaScript in the browser. Recently, I was working on TypeScript. Because TypeScript is a typed language, it needs the types of the packages we're using. Dev users helped me. Before you start, I'm so sorry for my grammar mistakes. Get 100% native API access with JavaScript, TypeScript, Vue. Learn more about Flow and TypeScript. Babel 7 does not need ts-loader. If you are using webpack, gulp or any build tool, you may consider the Babel option. It is widely supported across modern editors & build systems and can be customized with your own lint rules, configurations, and formatters. I’ve read that TypeScript has helped some teams with on-boarding developers, but I’ve also read the opposite. As for TypeScript support - well it is difficult not to see TypeScript as a competitor to Babel. This is the main reason just-task was made. TypeScript 2. 2018 Babel7 got released with an interesting preset: @babel/preset-typescript. Express Framework As you know, Express is a NodeJS web framework that works on the server. You can still use Typescript without React, just continue to follow. Its main purpose is to bundle JavaScript files for usage in a browser, yet it is also capable of transforming, bundling, or packaging just about any resource or asset. The only role for Babel in the future is in producing code that runs on legacy browsers while allowing you to write in the latest version of JavaScript. If you have any questions, feel free to reach out. The difference with the current configuration will be subtle if any, it’s a lot more visible if for example I changed the tsconfig. Confused yet? Modern web dev is all about comp transpiling things to other things and then back to other things. This article explains how I use TypeScript within Babel and Webpack. First install the TypeScript compiler and loader by running: npm install--save-dev typescript ts-loader. In your project, go ahead and add a greeter. Note: This post was updated to (1) accommodate the change in React 0. transpileModule, you may use the isolatedModules setting to make Wallaby do the same. Simple and clean. @babel/preset-typescript. TypeScript is an open-source programming language developed by Microsoft and it is said to be the superset of JS. To set up type checking in your. $ npm install --save-dev ts-babel-node [email protected] A more convenient way to setup Babel for usage with mobx is to use the mobx preset, that incorporates decorators and several other plugins typically used with mobx: npm install --save-dev babel-preset-mobx. If you are looking to set Typescript up from scratch with Babel, then this post about setting Typescript with Babel and Webpack might help you do that. TypeScript has never been easier thanks to the TypeScript plugin for Babel (@babel/preset-typescript), an official year-long collaboration between the TypeScript and Babel teams. Setting up a new. Luckily for us they have worked together, and with the introduction of Babel 7 developers will have a much easier time adopting TypeScript and using Babel at the same time. babel-loader) that apply to. json and the installed TypeScript version, ts-node runs the output JavaScript through Node. 7, you can start using the ** operator today. Over a year ago, we set out to find what the biggest difficulties users were running into with TypeScript, and we found that a common theme among Babel users was that trying to get TypeScript set up was just too hard. As for TypeScript support - well it is difficult not to see TypeScript as a competitor to Babel. Prior theory: 📚 Cloud Functions for Firebase with Compiled Code ES6, ES7, Flow, TypeScript, Babel & ParcelJS 📚 Babel & preset-env Compile to environments, not specifications 💻 Part 2: Cloud Functions for Firebase with Flow, TypeScript & ReasonML via ParcelJS. If you'd like to buy me a beer :-) Features at a glance. Tooling and Configuration. This allows the class. Or for the purposes of somewhat future-proofing this answer - ESNext to ES”current” transpiler. For example, to write your stories in Typescript, rather than manually configuring Storybook for typescript with individual babel and webpack configs, you can simply use the @storybook/preset-typescript package, which does the heavy lifting for you. For example, you can start a REPL via the following shell command: $ babel-node In the REPL, you can use ES6:. It is widely supported across modern editors & build systems and can be customized with your own lint rules, configurations, and formatters. json to use "typescript": "^2. The faster Babel should reduce build times. This means that TypeScript can be transpiled to JavaScript using Babel. For example, a Babel + fork-ts-checker-webpack-plugin is a great setup in Webpack land. @babel/preset-typescript. TypeScript in the browser. js are a perfect combination. Babel with TypeScript support to the rescue. Running the application; Let’s get started! 1. Due to the inference change of v15, if you import a Vue SFC inside node_modules , its part will be excluded from transpilation as well. The npm package babel brings Babel support to Node. Next 提案的方法。. Because TypeScript is a typed language, it needs the types of the packages we're using. If you *need* async, you’re going to have a bit of trouble at the moment, because it doesn’t play nice with the latest version’s babel-plugin-transform-runtime, *or* with the register script. js or Flow” There are huge fundamental differences between these languages/frameworks/tools (but Flow is really damn close) Practical Use Cases Games. One of the things that are very common in Object-Oriented languages is type casting. Confused yet? Modern web dev is all about comp transpiling things to other things and then back to other things. I’m using it in a project of ours, but I’d like to share it in order to make sure everything is fully functional / receive feedback by other members of the community. Extensible The plugin system allows the community to build and share reusable solutions to common needs. TypeScript 对应的 Tracker:Babel plugin for typescript · Issue #11441 · Microsoft/TypeScript; 虽然说目前 TypeScript 已经有第三方实现了,比如 TypeStrong/ntypescript,但是如果能够被 Babel 实现也许是一个不同的意义。 使用 Babel 实现 TypeScript 也许在编译器的可控性方面有一定优势,但. Erm, "suboptimal" documentation. Typescript and React are a great combination. DefinitelyTyped --version 0. Babel 6: using babel-preset-mobx. TypeScript is the ES6 version of JavaScript with some additional features. Babel compiles the code from recent ecma version to the one, which we want. TypeScript 1. x) Bundling and Minification (ASP. When I am finding out about new features, I want to know the exact ailment this feature is going to cure. In this post, we’ll go through the steps of setting up two basic React components that use ES6 features, use Babel to transpile them to ES5 and bundle them using Webpack. Babel configuration information. Folks looking for the most minimal serverless setup for a modern JS build step, this is article for you!. babel-plugin-module-resolver / babel-plugin-styled-components. To set up type checking in your. Reactjs and TypeScript Brief Prelude. TypeScript is in many ways, JavaScript in fast forward mode. This article explains how I use TypeScript within Babel and Webpack. TypeScript With Babel: A Beautiful Marriage 1) Namespaces. @babel/preset-typescript. I used my own boilerplate to jump start a React project with a basic Webpack configuration. This means that TypeScript can be transpiled to JavaScript using Babel. What I find interesting is that TypeScript is actually written in TypeScript. transpileModule, you may use the isolatedModules setting to make Wallaby do the same. com Today we’re excited to announce something special for Babel users. TypeScript is so called a typed superset of JavaScript. 0 has shipped! Naturally I'm excited. This README will also explain step-by-step how you can set up this repository so you can understand how each component fits together. TypeScript now supports ES2016 (the previous. 4 and forward, you can keep an eye on our feature roadmap page. TypeScript doesn’t (yet) have the concept of plugin transformations, which differs it from the likes of Babel. TypeScript is a typed superset of JavaScript that compiles to plain JavaScript. See the JavaScript/Default Babel Transforms section for more. Not sure why you would use both babel and Typescript If you're wanting to use promises is a browser that doesn't support them OOB, then use a polyfill (I use the npm es6-promise) It has Type definitions so everything works smoothly in TypeScript. Source code is on GitHub. When using relative paths in a TypeScript project of a certain size and complexity the imports start to look like this:. custom accepts a callback that will be called with the loader's instance of babel so that tooling can ensure that it using exactly the same @babel/core instance as the loader itself. Due to the inference change of v15, if you import a Vue SFC inside node_modules , its part will be excluded from transpilation as well. This means that projects using Babel can now use TypeScript, without ever needing to complicate their builds with the TypeScript compiler. You can see that in this project there is a README. See the JavaScript/Default Babel Transforms section for more. This means that TypeScript can be transpiled to JavaScript using Babel. In addition, various entry point scripts live in the top-level package at babel-cli/bin. Setting up Babel and TypeScript. Setting up TypeScript to work with Storybook. Babel and Traceur are two of the leading transpilers used for this purpose. Note: This post was updated to (1) accommodate the change in React 0. Babel 7 is released with support for TypeScript. Jest with TypeScript and jest. Since ts-babel-node is a wrapper around ts-node, anything you can do with ts-node works with. This article is a guest post from Christian Alfoni, who is a speaker among other world-class React hackers at Reactive2015 in Bratislava, November 2-4 2015. TypeScript Modules - Part 4. TypeScript Quickly teaches you to build outstanding modern apps with Typescript! To start, you'll master the TypeScript syntax, preparing you to delve into the practical examples that follow. There are a couple of TS loaders and we eventually settled on awesome-typescript-loader for a couple of reasons: it’s faster, by forking the type-checking and the emitter into separate processes, and has a great integration with Babel, in case you need to further compile your code with some handy Babel plugin (which we will not discuss in. Instead of running Babel from the command line directly, you can place commands in the scripts of the package. Babel compiles the code from recent ecma version to the one, which we want. TypeScript to ES2015 (ES6) to ES5 via Babel 6 March 18, 2016 January 28, 2018 matthewrwilton babel , gulp , typescript Note: ES2015 is the official name for ES6, but to provide a better distinction between it and ES5 (the previous version) I'll refer to it as ES6 from here on. As a replacement for Babel. WebPack also needs to be told to call Babel. Daily TypeScript news and articles. Basic Setup. babel-plugin-transform-typescript. It is arguably a better JavaScript and it compiles to ECMAScript 3 or later. --jsx: string. mock calls, then you will need to run Babel (babel-preset-jest) transformation on top of TypeScript compilation (just like ts-jest is doing) to hoist the calls:. 3" from "typescript": "^1. This episode we play around with Babel and the TypeScript plugin to have Babel transpile our TypeScript code. Babel is a javascript compiler. In the embedded Terminal (Alt+F12), type: npm install eslint babel-eslint --save-dev. While Babel can take over compiling/transpiling – doing things like erasing your types and rewriting the newest ECMAScript features to work in older runtimes – it doesn’t have type-checking built in, and still requires using TypeScript to accomplish that. We would only use two preset react and env. Using npm:. webpack #6495 Enable devtool for dev mode. com --- ## Overview of our development environment. One caveat to the default TypeScript support, similar to Flow, is that Babel will only. com @mariusschulz TypeScript Weekly Lots of great TypeScript tutorials and resources here, curated by Marius Schulz, a front-end developer at Facebook. AtScript was a proposed JavaScript-based scripting language extending Microsoft's TypeScript and transcompiling to JavaScript. It is widely supported across modern editors & build systems and can be customized with your own lint rules, configurations, and formatters. In this video we'll walk through how to use the right combination of Webpack 4 and Babel 7 in order to build our first React Component. Explicit language-specific support is required only for evaluation of code blocks in a language. Setting Up a React. This tutorial teaches how you can build, structure, test and debug a Node. TypeScript is in many ways, JavaScript in fast forward mode. for the browser. It packs CommonJs/AMD modules i. 4 supports, among other things, the latest TypeScript version, parentheses in the code and more. The one caveat is that Babel only does the transpiling, it doesn't check types at all. json to use "typescript": "^2. babel-plugin-module-resolver / babel-plugin-styled-components. What is TypeScript? TypeScript is a language with optional static typing that compiles to JavaScript. js application written in TypeScript. AtScript was a proposed JavaScript-based scripting language extending Microsoft's TypeScript and transcompiling to JavaScript. Babel is a name used in the Hebrew Bible for the city of Babylon. com @mariusschulz TypeScript Weekly Lots of great TypeScript tutorials and resources here, curated by Marius Schulz, a front-end developer at Facebook. Babelified webpack configs (like webpack. , Yiddish typescript synopses 55 9-11 Yiddish handwritten fragments 55 12 Corrected typescript 55 13-14 Corrected typescript with handwritten replacement pages; rejected handwritten and typescript pages; corrected typescript fragment 56 1-2 Two corrected typescripts 56 3 Corrected composite photocopy and original typescript fragment 56 4. I started a project using Babel sometime ago. We will be exploring compilation to Node targets with babel and tsc. typescript's entire codegen story leaves a lot to be desired (cf baseUrl/paths interop, use strict pragma duplication, header file generation, etc). To do so, first install the necessary Babel dependencies: npm install --save-dev @babel/core @babel/cli @babel/preset-env @babel/register Make sure your babel. 4 and forward, you can keep an eye on our feature roadmap page. TypeScript and Babel 7 | TypeScript. Features of TypeScript. See the JavaScript/Default Babel Transforms section for more. Obsviusly babel-loader makes use of Babel. A more convenient way to setup Babel for usage with mobx is to use the mobx preset, that incorporates decorators and several other plugins typically used with mobx: npm install --save-dev babel-preset-mobx. 2018 Babel7 got released with an interesting preset: @babel/preset-typescript. It packs CommonJs/AMD modules i. json to generate ES2016 or ES2017 first and then let. TypeScript 相比 ES6/7 有什么优势 ES6/7 并非是一无是处的,比如 ES Module 就是一个很好的设计,其静态特性保证了实体的唯一性,也确实能够为静态分析提供很大的帮助。(比如已经可以基本保证重构时的. Seth’s a great interview host (and a super cool guy to hang out with) and I really enjoyed talking with him about modern technology in today’s world. yml which will tell serverless how to deploy our function to AWS. The arguments of the method are: webpack config object, object with the following keys (all boolean): isDev, isClient, isServer. This language extension brings no changes to the intellisense. I'm targeting ES5 with the Typescript transpiler, which gives me support for ES6 syntax, but doesn't add the polyfills for the enhanced Array features etc of ES6 like Babel does. Once you have Babel setup, install @babel/preset-flow with either Yarn or npm. This can be achieved with composition. Let’s give it a shot and try to create smallest possible, webpack-based Angular config ever — using new Babel!. to firma o ugruntowanej pozycji na rynku specjalizująca się w rekrutacji specjalistów z branży IT (Certyfikat nr 14492). Using npm:. What is TypeScript? TypeScript is a language with optional static typing that compiles to JavaScript. The ability of lingui to support the intuitive syntax comes from the @lingui/babel-preset-react Babel transformation. Flow is created by Facebook, written in OCaml. Yakov works as a software architect at the IT consultancy Farata Systems and develops software products for the insurance industry. Even with TypeScript in the mix, ts-jest makes testing React applications easy. But there was a little problem — one of the requirements of the project was to write it in TypeScript. For example, Aurelia lists under technical benefits the following bullet point about Code Quality. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. TypeScript and Babel took different approaches, and even now, there really isn't a locked down standard. Setting up TypeScript to work with Storybook. I'm inspired by Randy Coulman's super detailed post on mocha-webpack, so I decided to share the results of my journey. typescript-json-schema generates JSON Schema files from your Typescript sources. Developing React components with TypeScript; 5. First install the TypeScript compiler and loader by running: npm install--save-dev typescript ts-loader. js Environment Using Npm, Babel 6 and Webpack Published Dec 16, 2015 Last updated Jan 18, 2017 Facebook has really changed the way we think about front-end UI development with the introduction of React. Babelを使ってJavaScriptで書いていたライブラリをTypeScriptへマイグレーションする方法についてのメモ書きです。数十回はライブラリやアプリケーションのコードベースをJavaScriptからTypeScriptへ変換しているので、ある程度やり方がパターン化されています。. TypeScript can serve as a replacement for Babel. The basics about React components; 4. Initially, many people doubted the aspirations of Microsoft in the JavaScript world. TLDR See this webpack. I'm inspired by Randy Coulman's super detailed post on mocha-webpack, so I decided to share the results of my journey. Now let's configure our AWS credentials so we can deploy our function. com --- ## Overview of our development environment. We’ll set checkJs: false because we don’t want TypeScript to start type. TypeScript can serve as a replacement for Babel. Otherwise, you can easily drive right off the map. Using Babel to compile TypeScript. The maintainers of TypeScript intend to keep TypeScript in sync with Javascript, implementing features from ES6 and ES7. They both plan to support (and already do in some cases) ES2016 features. NET supports stripping out type definitions from. The future of TypeScript on ESLint. The following is ES6 (or whatever is the current ES). Windows and Webpack With TypeScript and Babel about a 2 minute read Oct 20 th , 2015 I’ve recently been diving into the land of Webpack to handle all the heavy lifting of using Babel to compile my TypeScript and ES6 into ES5 JavaScript to be used in Ionic 2. 0), Babel 7 has native TypeScript 3. babel-loader is the Webpack loader responsible for taking in the ES6 code and making it understandable by the browser of choice.