when did javascript arrow functions come out code example

Example 1: arrow function javascript

// Normal Function in JavaScript
function Welcome(){
  console.log("Normal function");
}

// Arrow Function
const Welcome = () => {
  console.log("Normal function");
}

Example 2: arrow function javascript

/* Answer to: "arrow function javascript" */

// Single-line:
let testingFunc(string) => string == "Test" ? "Success!" : "Failure!";
console.log(testingFunc("test")); // "Failure!"

// Multi-line:
let arrowFunc(string) => {
  if (string = "test") {
    return "Success!";
  }
    return "Failure!";
  }
};
console.log(testingFunc("Test")); // "Success!"

/*
  Arrow functions in JavaScript are like regular functions except they look
  look nicer (imo) and there's single-line version of it which implicitly
  returns.
  
  Here's a guide showing the differences between the two:
  https://medium.com/better-programming/difference-between-regular-functions-and-arrow-functions-f65639aba256
  > The link will also be in the source below.
*/