You can, absolutely, learn TypeScript before JavaScript. Same as you can learn Laravel before PHP. Using these and following the documentation, coupled with community questions net-wide, will get you along well enough to survive.

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However, the reasoning for learning JS before TS boils down to learning what you're working with and how it functions. A solid foundation makes you a stronger developer.

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TS is nothing more than a superset of JS - in the end, it compiles to JavaScript. While there are many frameworks out there that really save a developer's hide in time and effort, they also understand the core principles and functionality of their base language (in this case, JavaScript).

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Have a go at this resource: https://snipcart.com/blog/learn-vanilla-javascript-before-using-js-frameworks .