Syntax problem, don't know where

Hi, im facing the first challenge of js libraries : this project im setting js first but codepen tell me syntax error. hope you can give me a hint
Here’s my project

in codepen JS editor press the down arrow and click analyze

also looks like you are missing a check condition in the second for loop in getQuote function.

unction getQuote= (arr) => {
  for (let i = 0; i<arr.length; i++)
    for (let y = Math.floor(Math.random() * arr.length)){     <------- HERE
      (while i <=y){
        let result = '';
        result= result + arr[y];
        return result

Ok, i not so much good in grammary, anyway can i ask you how to set the react environment? do i have to change from js to babel? yesterday i did so, but even with the reactDom.render it didnt seem work.

Can someone help me? i have done this script:

var quotesData = [ "La vita, se vissuta bene, è lunga abbastanza.", "Ieri è andato. Domani non è ancora arrivato. Abbiamo solo oggi. Cominciamo.", "Più conosci te stesso, più comprendi la vita, più apprezzi il tuo tempo.", "Ogni secondo ha un valore infinito."];

var tuttiGliAutori = ["Seneca", "Madre Teresa", "Maxime Lagacé ", "Johann Wolfgang von Goethe "];

var nextQuote = '';

var nextAuthor = '';

var y = Math.floor(Math.random() * quotesData.length);

console.log(y); // yes

var z = Math.floor(Math.random() *tuttiGliAutori.length);;

const onClickFunction = () => { document.getElementById("p1").innerHTML = quotesData[y];}

const onClickFunction2 = () => {document.getElementById("p2").innerHTML = tuttiGliAutori[y]}

this is the html:

<!DOCTYPE html>
<html lang="en">
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="loscript.js"></script>
            <h1 id="p1">Quote</h1>
            <h5 id = "p2">Author</h5>
            <button onclick="onClickFunction(); onClickFunction2();">New Quote</button>

the h1 and h5 value dosent change on click, hope you can give me a hint!

My last code seems it works, i only want to ask you: how can i repeat at infinite my functions that start onclick in my button? using the infinite loop my browser crash! :rofl: