When the input file extension is .ts, TypeScript consults the nearest package.json file to determine the module format. The same rules apply to the .d.cts and .d.ts declaration files in the pkg depend...
When the input file extension is .ts, TypeScript consults the nearest package.json file to determine the module format. The same rules apply to the .d.cts and .d.ts declaration files in the pkg dependency. Inside a host environment like a web browser, JavaScript connects to objects to provide control. The relationship between a .ts file and .js file is that TypeScript compiles to JavaScript. Instead of a breaking change to require migration to new syntax, the TypeScript team added a new .tsx extension. This made JSX opt-in and aligned with React’s .jsx extension. There are benefits to the new extension: Bundlers can run plugins just for .tsx files and editors can show different icons. Test runners can run different environments and developers communicate intent better.
To use TypeScript, first install an integrated development environment like Visual Studio Code. Open the IDE, create a new .ts file, and enter TypeScript code. Use the built-in compiler to generate a .js file readable by JavaScript. Run the program by launching the .js file. TypeScript files can convert to JS, JSON and more. The .ts extension stores TypeScript code. TypeScript has become popular lately. Inside environments like browsers, JavaScript connects to objects to control them programmatically. The .ts and .js files have a compile relationship. Instead of a breaking change, TypeScript added the new .tsx extension. This opt-in extension has benefits.
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