> npm install -g typescript
const Greeter = (person) => { return `Hello ${person}` } let user = "Pickle Rick" document.body.innerHTML = Greeter(user);
var Greeter = function (person) { return "Hello " + person; }; var user = "Pickle Rick"; document.body.innerHTML = Greeter(user);
greeter.ts
greeter.js
const Greeter = (person:string) => { return `Hello ${person}` } let user = [1,2,3] document.body.innerHTML = Greeter(user);
error TS2345: Argument of type 'number[]' is not assignable to parameter of type 'string'.
By erica mitchell
This talk will equip you to answer the question: Should I be using TypeScript?
Founder, blackGirlsCode(2), Javascript Enthusiast