Why is the JavaScript prompt working improperly?

Question

The prompt statement in JavaScript (not Web JavaScript) is supposed to return a > prompting the user to enter a string. Here is my code:

var i;
while(i == i) {
    var input = prompt();
}

Yet this is the output: undefined> Is there a reason this is happening?

running your code as is results in `ReferenceError: prompt is not defined` as expected — Jaromanda X, Aug 21 '20 at 00:05
Does this answer your question? [nodejs how to read keystrokes from stdin](https://stackoverflow.com/questions/5006821/nodejs-how-to-read-keystrokes-from-stdin) — Adrian Brand, Aug 21 '20 at 00:18

score 0 · Accepted Answer · answered Aug 21 '20 at 00:09

0

Its saying undefined because there is no text inside prompt use

   Var input = prompt(' ');

It will generate a prompt with no question.

Also if you are using Node js then it will not work because prompt is part of Vanilla Js not Node js.

answered Aug 21 '20 at 00:09

Karan Singh

score 0 · Answer 2 · answered Aug 21 '20 at 03:04

0

Use readline, prompt, or prompts. prompt/prompts is very easy to use, readline is more advanced.

answered Aug 21 '20 at 03:04

2 Answers2