Swift vs TypeScript

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Swift

13K
9.3K
+ 1
1.2K
TypeScript

49.7K
38.8K
+ 1
462
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Swift vs TypeScript: What are the differences?

Developers describe Swift as "An innovative new programming language for Cocoa and Cocoa Touch". Writing code is interactive and fun, the syntax is concise yet expressive, and apps run lightning-fast. Swift is ready for your next iOS and OS X project — or for addition into your current app — because Swift code works side-by-side with Objective-C. On the other hand, TypeScript is detailed as "A superset of JavaScript that compiles to clean JavaScript output". TypeScript is a language for application-scale JavaScript development. It's a typed superset of JavaScript that compiles to plain JavaScript.

Swift and TypeScript are primarily classified as "Languages" and "Templating Languages & Extensions" tools respectively.

"Ios", "Elegant" and "Not Objective-C" are the key factors why developers consider Swift; whereas "More intuitive and type safe javascript", "Type safe" and "JavaScript superset" are the primary reasons why TypeScript is favored.

Swift and TypeScript are both open source tools. It seems that TypeScript with 51.2K GitHub stars and 7.07K forks on GitHub has more adoption than Swift with 48.4K GitHub stars and 7.76K GitHub forks.

Slack, Asana, and Rainist are some of the popular companies that use TypeScript, whereas Swift is used by Uber Technologies, Slack, and Lyft. TypeScript has a broader approval, being mentioned in 982 company stacks & 1447 developers stacks; compared to Swift, which is listed in 993 company stacks and 541 developer stacks.

Advice on Swift and TypeScript
Needs advice
on
TypeScript
and
Flow (JS)

From a StackShare community member: "We are looking to rewrite our outdated front-end with TypeScript. Right now we have a mix of CoffeeScript and vanilla JavaScript. I have read that adopting TypeScript can help enforce better code quality, and best practices. I also heard good things about Flow (JS). Which one would you recommend and why?"

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Replies (14)
Recommends
TypeScript

I use TypeScript because:

  • incredible developer tooling and community support
  • actively developed and supported by Microsoft (yes, I like Microsoft) ;)
  • easier to make sense of a TS codebase because the annotations provide so much more context than plain JS
  • refactors become easier (VSCode has superb support for TS)

I've switched back and forth between TS and Flow and decided a year ago to abandon Flow completely in favor of TS. I don't want to bash Flow, however, my main grievances are very poor tooling (editor integration leaves much to be desired), a slower release cycle, and subpar docs and community support.

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Recommends
TypeScript

I use TypeScript because it isn't just about validating the types I'm expecting to receive though that is a huge part of it too. Flow (JS) seems to be a type system only. TypeScript also allows you to use the latest features of JavaScript while also providing the type checking. To be fair to Flow (JS), I have not used it, but likely wouldn't have due to the additional features I get from TypeScript.

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David Koblas
VP Engineering at Payment Rails · | 9 upvotes · 69.8K views

We originally (in 2017) started rewriting our platform from JavaScript to Flow (JS) but found the library support for Flow was lacking. After switching gears to TypeScript we've never looked back. At this point we're finding that frontend and backend libraries are supporting TypeScript out of the box and where the support is missing that the commuity is typically got a solution in hand.

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Forrest Norvell
engineering manager at self-employed · | 6 upvotes · 169.9K views
Recommends
TypeScript

I use TypeScript because the tooling is more mature (the decision to discontinue TSLint in favor of moving all its checks to ESLint is a thoughtful and mature decision), there's a ton of examples and tutorials for it, and it just generally seems to be where the industry is headed. Flow (JS) is a fine tool, but it just hasn't seen the uptake that TS has, and as a result is lacking a lot of the nicer small things, like thorough Visual Studio Code integration, offered by TS.

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Recommends
TypeScript

We currently use TypeScript at work. Previously we used Flow (JS) but it was sometimes really difficult to make the types work the way you want. Especially non-trivial types were problematic. And the IDE support wasn't good, Flow took too much resources and sometimes remain stuck and do not show errors (I use Visual Studio Code). With TypeScript we almost do not have these problems. IDE support is superb, working with types is much easier and typing system seems more mature and powerful. There are some downsides (like partion inheritance etc.), but TS team is still pushing it forward. So for me TypeScript is clear winner.

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Tim Abbott
Recommends
Underscore
at

We use Underscore because it's a reasonable library for providing all the reasonable helper functions missing from JavaScript ES5 (or that perform poorly if you use the default ES5 version).

Since we're migrating the codebase to TypeScript , we'll likely end up removing most usage of it and ultimately no longer needing it, but we've been very happy with the library.

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Recommends
TypeScript

I use TypeScript for Web Applications and for both frontend and backend because it has a lot of tooling around it and they really got the types and type safety right. Flow (JS) on the other hand lacks tooling and most of the times I scramble to find the right way of building my contracts in which TypeScript is very intuitive and natural. Additionally TypeScript is very similar to Java so your backend engineers and full stack engineers can work with it without much of context switch.

The only time I think Flow shines is (based on probably my outdated knowledge) Flow is/was the only option if you want/wanted to build a React Native application mainly because React Native transpiler at the time I was working with it would only work with flow.

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Recommends
TypeScript

I use TypeScript because it's adoption by many developers, it's supported by many companies, and it's growth. AngularJS, React, @ASP.NET Core. I started using it in .NET Core, then for a job. Later I added more Angular experience and wrote more React software. It makes your code easier to understand and read... which means it makes other people's code easier to understand and read.

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Recommends
TypeScript

I use TypeScript because it's the most mature/issue-free Javascript type-checker available, as far as I've seen.

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Frédéric MARAND
Core Developer at OSInet · | 2 upvotes · 52.1K views
Recommends
TypeScript

I use TypeScript because I tried both on a Meteor project, and found the quantity of errors it enabled us to catch and the simplification of code it allowed was higher than Flow (JS).

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Recommends
TypeScript

I use TypeScript because of broad support, on tools, repos, community ... the only reason to consider flow is if you're a facebook employee

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Recommends
TypeScript

If you will start a project from scratch I recommend to use TypeScript. But, If you work with legacy projects written in JavaScript I recommend Flow (JS). Both tools have the same objective: reduce the bad code (which create illegible code, generate bugs e problems to maintenance). Flex helps you to avoid fall in bad codes, but TypeScript prevent you to c you to create bad codes. I believe cause this some JavaScript fans don't like TS, because TS block you to write some types o code. This is the fundamental difference between TS and Flow: Flow avoid problems, but no force. TS force you to prevent problems.

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Rafael Avaria
Ingeniero civil en electrónica · | 1 upvotes · 38.8K views
Recommends
TypeScript

I use TypeScript because i love to program in Angular and used in node as well

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Damian Esteban
CTO @ betterPT at BetterPT · | 1 upvotes · 39.6K views
Recommends
TypeScript
at

I recommend TypeScript. When used correctly, TypeScript can enable your application to be scalable, easy to refactor, safe, and stable. One of the biggest draws of working with any typed language is that it forces you to think about your functions' inputs and outputs. This is invaluable as it can lead to more declarative, functional style code that ultimately can be easier to reason about.

TypeScript is however not a silver bullet. Just like anything new it takes time to fully understand the concepts of types, interfaces, abstract classes, and enums. In my experience engineers who excel when using TypeScript are those who have experience working with a statically typed language.

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Decisions about Swift and TypeScript
Vladyslav Holubiev
Software Enginieer at Shelf · | 3 upvotes · 47.4K views

As our codebase grew in size, we were looking for ways to improve code quality. We chose TypeScript over Flow due to its rapid industry adoption and overall tools support.

We noticed how different open-source projects were migrating from Flow to TypeScript. Most notably, it was Jest, even though Jest and Flow were both developed by Facebook. See this HN thread if you want to dive into an interesting discussion around this move.

Additionally, at the beginning of 2019, both Babel and ESLint enabled seamless TypeScript support, which allowed easy migration path in a backward-compatible way.

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Oleksandr Fedotov
Senior Software Engineer at joyn · | 4 upvotes · 42.6K views

Initially making a decision to use Flow vs Typescript we decided to go with flow as we wanted our code to run in a way we wrote it, because when using Flow types are simply removed from the code without modifying the code itself. Sadly, the type system of Flow was in some cases very hard to understand and declare the types correctly, especially in cases when the structure is very dynamic (e.g. object keys and values are created dynamically). Another reason was bad integration with IDE and frequent crashes which made DX very poor. Therefore, we made another evaluation of Typescript and decided to move towards it. As our code base was pretty big when we decided to migrate to TS we couldn't just stop and re-write everything, that's why we started writing new modules in Typescript as well as transforming old components. To make that possible we had to configure Webpack loader to support simultaneous bundling of Flow&JS and Typescript. After around 2 months of the transformation we have around 40% of code being written in Typescript and we are more than happy with integration TS has with IDE, as well as ease of declaring types for dynamic modules and functions.

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Pros of Swift
Pros of TypeScript
  • 250
    Ios
  • 176
    Elegant
  • 124
    Not Objective-C
  • 105
    Backed by apple
  • 91
    Type inference
  • 60
    Generics
  • 54
    Playgrounds
  • 49
    Semicolon free
  • 39
    OSX
  • 35
    Tuples offer compound variables
  • 24
    Easy to learn
  • 23
    Clean Syntax
  • 21
    Open Source
  • 20
    Functional
  • 19
    Beautiful Code
  • 11
    Linux
  • 11
    Dynamic
  • 10
    Promotes safe, readable code
  • 9
    Protocol-oriented programming
  • 8
    Explicit optionals
  • 8
    No S-l-o-w JVM
  • 6
    Storyboard designer
  • 5
    Best UI concept
  • 5
    Optionals
  • 5
    Type safety
  • 5
    Super addicting language, great people, open, elegant
  • 4
    Its friendly
  • 4
    Powerful
  • 4
    Fail-safe
  • 4
    Highly Readable codes
  • 4
    Faster and looks better
  • 4
    Swift is faster than Objective-C
  • 4
    Feels like a better C++
  • 3
    Its fun and damn fast
  • 3
    Easy to learn and work
  • 3
    Much more fun
  • 3
    Protocol extensions
  • 3
    Native
  • 3
    Strong Type safety
  • 3
    Easy to Maintain
  • 2
    Protocol oriented programming
  • 2
    Esay
  • 2
    MacOS
  • 2
    Type Safe
  • 2
    All Cons C# and Java Swift Already has
  • 2
    Protocol as type
  • 1
    Actually don't have to own a mac
  • 1
    Can interface with C easily
  • 1
    Numbers with underbar
  • 1
    Optional chain
  • 1
    Runs Python 8 times faster
  • 1
    Free from Memory Leak
  • 1
    Swift is easier to understand for non-iOS developers.
  • 1
    Great for Multi-Threaded Programming
  • 1
    Objec
  • 163
    More intuitive and type safe javascript
  • 97
    Type safe
  • 73
    JavaScript superset
  • 46
    The best AltJS ever
  • 27
    Best AltJS for BackEnd
  • 14
    Powerful type system, including generics & JS features
  • 10
    Nice and seamless hybrid of static and dynamic typing
  • 9
    Aligned with ES development for compatibility
  • 9
    Compile time errors
  • 6
    Structural, rather than nominal, subtyping
  • 5
    Angular
  • 3
    Starts and ends with JavaScript

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Cons of Swift
Cons of TypeScript
  • 5
    Must own a mac
  • 2
    Memory leaks are not uncommon
  • 1
    Its classes compile to roughly 300 lines of assembly
  • 1
    Complicated process for exporting modules
  • 1
    Very irritatingly picky about things that’s
  • 1
    Is a lot more effort than lua to make simple functions
  • 0
    Overly complex options makes it easy to create bad code
  • 4
    Code may look heavy and confusing
  • 2
    Hype

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What is Swift?

Writing code is interactive and fun, the syntax is concise yet expressive, and apps run lightning-fast. Swift is ready for your next iOS and OS X project — or for addition into your current app — because Swift code works side-by-side with Objective-C.

What is TypeScript?

TypeScript is a language for application-scale JavaScript development. It's a typed superset of JavaScript that compiles to plain JavaScript.

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What companies use Swift?
What companies use TypeScript?
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What tools integrate with TypeScript?

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What are some alternatives to Swift and TypeScript?
Objective-C
Objective-C is a superset of the C programming language and provides object-oriented capabilities and a dynamic runtime. Objective-C inherits the syntax, primitive types, and flow control statements of C and adds syntax for defining classes and methods. It also adds language-level support for object graph management and object literals while providing dynamic typing and binding, deferring many responsibilities until runtime.
React Native
React Native enables you to build world-class application experiences on native platforms using a consistent developer experience based on JavaScript and React. The focus of React Native is on developer efficiency across all the platforms you care about - learn once, write anywhere. Facebook uses React Native in multiple production apps and will continue investing in React Native.
Kotlin
Kotlin is a statically typed programming language for the JVM, Android and the browser, 100% interoperable with Java
Go
Go is expressive, concise, clean, and efficient. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel type system enables flexible and modular program construction. Go compiles quickly to machine code yet has the convenience of garbage collection and the power of run-time reflection. It's a fast, statically typed, compiled language that feels like a dynamically typed, interpreted language.
Java
Java is a programming language and computing platform first released by Sun Microsystems in 1995. There are lots of applications and websites that will not work unless you have Java installed, and more are created every day. Java is fast, secure, and reliable. From laptops to datacenters, game consoles to scientific supercomputers, cell phones to the Internet, Java is everywhere!
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