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What are differences between JavaScript and TypeScript concretely ?

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  • 1
    Typings, interfaces, classes. Similar to ES6, I suppose.
  • 3
    Typescript is to javascript what sass is to css. In other words, you use typescript to have better code organization/syntax, but it will always end up being converted to javascript. You can't run raw typescript on a browser or a nodejs server.
  • 2
    It's ES6 with static typing like in Java or C# and some other little nice stuff.
  • 1
    I've seen Typescript described as 2 things: a "linter on steroids" and a transpiler. This drives home the point that Typescript just ends up as pure JavaScript, which I've found many people seem to fail to grasp.
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