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JavaScript Object-Oriented JavaScript Object Basics Filling Out the Play Method

Daniel Spykstra
Daniel Spykstra
8,496 Points

Declaring variables inside if statements.

Hello!

So I finally figured out this code challenge. My question is are you able to declare a variable inside of an if statement? This code challenge wanted me to type my if statement as follows:

if (this.isTurn) {
  console.log();
} 

however this was not previously set as a variable. I kept typing out this:

if(player1.isTurn == true ) {
 console.log();
}  

Thank you!

object.js
const player1 = {
    name: 'Ashley',
    color: 'purple',
    isTurn: true,
    play: function(){
        // write code here.
      if (this.isTurn) {
        console.log(`${this['name']} is now playing!`);
      } else {
        console.log(`Not yet`);
      }

    }
}

3 Answers

Alexander Einerskog
Alexander Einerskog
11,932 Points

Hello Daniel!

What they're doing is using the 'this' keyword to refer to the player1 object. Basically when you use 'this' inside of the player1 object, the computer interprets it as you writing 'player1', so 'this.isTurn' becomes functionally the same as 'player1.isTurn'.

The 'this' keyword can therefore be used to simplify code within objects by not needing to know that the object itself is called player1, but many find it confusing which is why some people opt to not use it.

Daniel Spykstra
Daniel Spykstra
8,496 Points

Thank you Alexander! This makes way more sense now.

Himanshu Anand
Himanshu Anand
4,666 Points

const player1 = { name: 'Ashley', color: 'purple', isTurn: true, play: function(){ // write code here. if(this.isTurn===true) { console.log(${this['name']} is now playing!); } } }

//can you suggest what we are doing wrong