接受用户的多个输入

Question

I want to get user input from user. I have created a function to do that by taking the code from node.js documentation. But I cannot receive multiple user inputs. How can I do that? This is the code so far.

function getUserInput() {
        rl.question('Please input a letter: ', (answer) => {
        console.log('Letter entered: ${answer}');
        rl.close();
        }); 
    }

//getUserInput();

var k=0; 
while ( k < 3 ){
        getUserInput();
        k++;
    } 

I expect to take for example 3 user inputs. I want to take user input. With the code above I can only take only ONE user Input. I thought adding the function into a loop so it could work. I am looking for any modification into my code so It can work and so I can take more than one user input.

Answer 1

Inquirer is probably what you're looking for, assuming that you're trying to get user input on the command line.

Description taken from the repo itself:

Inquirer.js strives to be an easily embeddable and beautiful command line interface for Node.js (and perhaps the "CLI Xanadu").

Inquirer.js should ease the process of

• providing error feedback
• asking questions
• parsing input
• validating answers
• managing hierarchical prompts

Also, here's an example on how to use it:

const inquirer = require('inquirer');

const questions = [
  {
    type: 'input',
    name: 'first_name',
    message: "What's your first name"
  }, {
    type: 'input',
    name: 'last_name',
    message: "What's your last name",
    default: function() {
      return 'Doe';
    }
  }
];

inquirer.prompt(questions).then(answers => {
  console.log(JSON.stringify(answers, null, '  '));
});

Cheers.

Answer 2

This appears to be using something like the promises API.

const readline = require('readline');
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
}); 


function getUserInput(n) {
    rl.question('Please input a letter: ', (answer) => {
        console.log(`Letter entered: ${answer}`);
        if (n < 3) {
            getUserInput(n+1);
        } else {
            rl.close();
        }
    }); 
}

getUserInput(1);

When I run it, this happens:

$ node getinput.js
Please input a letter: a
Letter entered: a
Please input a letter: b
Letter entered: b
Please input a letter: c
Letter entered: c

Answer 3

I think the problem is that rl.question waits for an input before proceeding but the while loop doesn't. Here's a simple node cli that does what you're after, I think. Just save this code in a file named index.js and go to the directory and type: node index.js

 // Dependencies
 var readline = require('readline');

 var cli = {};

 // Init function
 cli.init = function(){
   // Send the start message to the console in magenta
   console.log('\x1b[35m%s\x1b[0m',"The CLI is running");

   // Start the interface
   var _interface = readline.createInterface({
     input: process.stdin,
     output : process.stdout,
     prompt : '>'
   });

   var arrayOfInputs = [];
   var k = 0;
   var max = 3;
   cli.getUserInput = function(){
     _interface.question("Ask Something? ", function(str){
       k++;
      arrayOfInputs.push(str);
      if(k < max){
        cli.getUserInput();
      } else {
        console.log(...arrayOfInputs);
      }
    });
   };

   cli.getUserInput();

 };

 cli.init();