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[typescript]how to build a ts project

first of all, we need to ensure npm and node.js are correctly installed.

mac@MacBook-Pro ~ % node -v
v24.4.1
mac@MacBook-Pro ~ % npm -v
11.4.2
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then we need cd into our project dir and create a package.json

mac@MacBook-Pro Work % mkdir ts-demo
mac@MacBook-Pro Work % cd ts-demo
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install ts

mac@MacBook-Pro ts-demo % npm install --save-dev typescript
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initialize a config file


mac@MacBook-Pro ts-demo % npx tsc --init


Created a new tsconfig.json                                                     
                                                                             TS 
You can learn more at https://aka.ms/tsconfig
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create src/index.ts

const greet = (name: string): string => {
  return `Hello, ${name}!`;
};

console.log(greet("TypeScript on Mac"));
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compile it:

mac@MacBook-Pro ts-demo % npx tsc
mac@MacBook-Pro ts-demo % node src/index.js
Hello, TypeScript on Mac!
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ok. now the first ts project has been succefully created

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