Home / Questions / 456257
Accepted
Pedro
Asked: 2022-05-31 16:51:50 +0800 CST 2022-05-31 16:51:50 +0800 CST

Closure in js functions

  • 772

When inserting a function in the browser console an error is generated and I can't figure out what the error is. The situation is the following

const sayHello = function(){
 
let greetingMsg = "Greetings ";
 
function msgTo(firstName, lastName){
 
greetingMsg = greetingMsg + firstName + " " + lastName;
 
}
 
return {
 
sendGreeting: function(firstName, lastName){
 
msgTo(firstName, lastName);
 
}
 
getMsg: function(){
 
return greetingMsg;
 
}
 
}
 
}
const createMsg = sayHello();
createMsg.sendGreeting(("Professor" , "Falken");
console.log(creatMsg.getMsg());

I would like to know where is the error to understand the function more clearly

javascript-objeto

1 Answers

  1. Best Answer

    I found at least two bugs that need to be fixed.

    First, that when you create the constant const createMsg, then you call it with another name in the console.log(creatMsg.getMsg());.

    Keep in mind to use the names of the variables well. I would recommend that you copy and paste them when reusing them to avoid such errors.

    Next, another thing you missed is adding a comma between the sendGreetingand property getMsg.

    When declaring an object in JavaScript, always separate its properties by commas.

    Making those corrections, the code would look like this:

    const sayHello = function(){
 
  let greetingMsg = "Greetings ";
 
  function msgTo(firstName, lastName){
 
    greetingMsg = greetingMsg + firstName + " " + lastName;

  }
 
  return {
 
    sendGreeting: function(firstName, lastName){
 
      msgTo(firstName, lastName);
 
    },
 
    getMsg: function(){
      
      return greetingMsg;
 
    }
 
  }
 
}

const createMsg = sayHello();
createMsg.sendGreeting("Professor" , "Falken");
console.log(createMsg.getMsg());

    • 2