When I use msg = readLine(); just as says at JS course in my pc navigator it doesn't recognize it, any idea of why?

Answer 1

For front-end browser based script (Javascript) inputs are read using prompt() https://developer.mozilla.org/en-US/docs/Web/API/Window/prompt

For back-end script (node.js) there is something similar https://nodejs.org/api/readline.html but this I guess is only feasible when running through console.

Answer 2

I am studying JS, and I meant when I tried on Chrome with my pc, in a file apart from the sololearn simulator

Answer 3

Are you studying JS or node.js? these two have different ways for obtaining inputs.

What did you mean by "PC navigator"?