The the URL for WikiURL no longer works, you cannot complete the exercise !!!

Hey, Rohald,

Yes it is for the "implement a callback" video. But, I figured out the problem, the problem is within the Json data, that is returned from the astrosUrl. The data under the people.name's array portion of the data, the astronauts in space between their first and last name there is a space " " . But it should be a underscore instead "_" .

So, when you try to concatenate the names with the wikiUrl it doesn't work. Because of the issue with the spaces between the first and last names of the astronauts.

So, to fix it, I had called the .map on the returned jsonData from the astroUrl. To created another array, with that data to removed the spaces between astronauts first and last name. And replace the space with an underscore. By using the .replace method on the returned data from the astroUrl.

Then took that new array, and then concatenated the values of the astronauts in space with an "_" between their first and last name, and it worked.

The JsonData is currently return values like this a space between the first and last name

{craft: 'ISS', name: 'Sergey Prokopyev'} , {craft: 'ISS', name: 'Dmitry Petelin'} , {craft: 'ISS', name: 'Frank Rubio'}

The data needs to be like this to work with being concatenated in the wikiUrl no space between the first and last name only a "_"

{craft: 'ISS', name: 'Sergey Prokopyev'} , {craft: 'ISS', name: 'Dmitry_Petelin'} , {craft: 'ISS', name: 'Frank_Rubio'}

The code

btn.addEventListener("click", ()=>{
  getJSON(astrosUrl, (jsonData)=>{


 //Repaces the spaces between the people in spaces first name and last name with " _" , by using the .replace property
let removeSpaces = jsonData.people.map(person => person.name.replace(" ", "_"));


  //an array that I just used to renamed the removeSpaces array with the people from spaces data--> 
let people = removeSpaces; 

  //loops through the names of the people in space and concatenate each name to the end of the wikiUrl link 
for(let i=0; i<people.length; i++){  
        getJSON(wikiUrl+people[i], generateHTML);
    } 
 });  
});