Pass parameters into TypeScript script and run it

Question

So I'm new to typescript. I wanted to create very simple HelloWorld where I can pass parameter (here mentioned string) to script, but I'm unable to get it to work. Here's what I'm trying to do:

let sentence: string = process.argv[1];

console.log(sentence);

But when I try to compile it (tsc file.ts) to produce file.js file to execute it with node file.js "HelloWorld" I get following error for process

error TS2580: Cannot find name 'process'. Do you need to install type definitions for node? Try `npm i @types/node`. Even after I run command mentioned in Error msg. What's going on?

Zunaib Imtiaz · Accepted Answer · 2020-01-22 07:05:37Z

3

Well in typescript, you need type definitions to support functions and props. Do as its suggesting you to

npm i @types/node

answered Jan 22, 2020 at 7:05

Zunaib Imtiaz

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Comments

Mor Shemesh · Accepted Answer · 2020-01-22 09:59:52Z

1

try adding a tsconfig.json file and run tsc from the same folder:

{
    "compilerOptions": {
        "module": "commonjs",
        "moduleResolution": "node",
        "target": "es5",
        "lib": ["dom", "es2017"],
        "types": ["node"],
        "skipLibCheck": true
    },
    "files": ["file.ts"]
}

By default, node_modules/@types directories would be referenced: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html

answered Jan 22, 2020 at 9:59

Mor Shemesh

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