What's New in TypeScript 4.8 -- Visual Studio Magazine

2022-09-09 20:50:56 By : Mr. Alan Xie

Microsoft released TypeScript 4.8 with a host of new features ranging from Find All References improvements to the ability to exclude specific files from auto-imports.

TypeScript, which as its name suggests is a strongly typed language along with being a strict syntactical superset of JavaScript, builds on the non-typed JavaScript by adding the ability to use optional static typing. It has been on a roll lately, recently cracking the top 10 in IEEE's language popularity ranking, while also seeing an explosion in job postings and vaulting past Java to crack the Stack Overflow top five languages.

Here's a summary of what's new in v4.8, along with links for more information.

"This is not the case in JavaScript, where == and === between objects (and therefore, arrays) check whether both references point to the same value. We believe that similar code in JavaScript is at best an early foot-gun for JavaScript developers, and at worst a bug in production code." Thus TypeScript no longer allows code like this:

Rosenwasser also detailed many correctness fixes and breaking changes, along with pointing to what's coming up in v4.9 in November, explained in detail in the TypeScript 4.9 Iteration Plan.

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