re: This is why I hate Typescript VIEW POST


Disagree all the points.


TypeScript is a super set of JavaScript, you use TS syntax in design-time and tsc to JavaScript code for runtime. (Just like most people us JS2015+ in design-time, babel to JS5 for runtime)


  • the TS class is just like ES6+ class;
  • the JavaScript code is not a ES6+ class, but a ES5 function extending its prototype.

Private properties

today's status: "Public and private field declarations are an experimental feature (stage 3) proposed at TC39".
ES2 (1998) defined the reserved words: class, private, public, etc.
TypeScript uses "private" in class was a natural move.(unfortunately, not same as the es2019). But no break changes for TS developers, you don't hear them cry.

Typescript is not JavaScript

Of course you have errors for the factorial function (if using default tsconfig), that's the most important job TS does -- static type-checking.

The creator of Typescript knows nothing about programming

No comment. ( subjective topic)

People only use Typescript because they are used to OO languages

Not exactly, most of TypeScript (Object Oriented) features are being added to JS.
People use TS mainly because its static type-checking feature.

You can't debug Typescript

Why! I debugged TS in my first TS project.

Babel is so much better

overlapped in code trans-pile, but different others
Babel transforms JS code (high version to low version)
Babel uses TS (plugin) to transforms TS code
Babel uses Flow to transform Flow code

Typescript is only used in Angular

Yes, Angular is only framework forces application users to use TS syntax;
(you can use Angular UMD package in JavaScript, not popular usage)

Flow is better

Subjective. Flow is not standard JS either, it still needs to be transpiled.
Difference Flow vs TS, flow marks inline, but TS marks the extension.

You shouldn't use Typescript

my personal opinion:

  • use JavaScript, if you are application developers.
  • use TypeScript, if you are framework/library/package developers. (when building, deliver cms, ems, umd, whatever to your application users, just like Google material-ui team, VUI, AirBnb, firebase etc.)

my comment about TypeScript

pros: improve JavaScript code robustness, productivity (for experienced)
cons: learning curve high.
remember: TS is for static syntax type checking.

check this really big team experience sharing


I will write property about ts. Hope you like that as well.

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