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JavaScript JavaScript Objects Loop Through Objects Display an Array of Objects on the Page – One Solution

Posted by Megha Singh
Megha Singh
6,146 Points

I tried the for in loop and it didn't work.

for (var pet in pets){ console.log(pet[name]); } This returned "undefined". Why?

Also, when I did html.concat(<h2>${pet.name}</h2>) and logged it, it returned empty string, why is that?

Zaid Khan
Zaid Khan
12,769 Points

Also always try to wrap your code with 3 backticks (```) on the line before and after.

1 Answer

Zaid Khan
Zaid Khan
12,769 Points

It's returning undefined because you are trying to access the name by index(pet) of for loop.

If you want names from object pets, then this is how you loop and get the value by .name

for( let pet in pets){
  console.log(pets[pet].name) 
}

And to render on the page just cover the value of the name in the h2 element.

let html = '';

for( let pet in pets){
  html += `
  <h2>${pets[pet].name}</h2>
` 
}
document.querySelector('main').innerHTML = html;