My solution for the final challenge - feedback wanted.

Rasmus,

Your code looks fine and works well. You would only need to put your focus() function in a 'load' eventListener if you loaded the script at the beginning of your HTML file, in which case all your global getElementById() functions would have thrown errors as well, but since you loaded it at the end eventListener is not needed. For constructive feedback I would suggest a few changes...

First, you don't need to declare a global student variable. Your searchForStudent function already goes through each index of the passed array, setting a student variable equal to student[i] here is redundant. Simply comparing the value of students[i].name to your searchField value produces the same result.

Second, in the same function you're telling the logic to write some HTML every time students[i].name does not match your search criteria, then erasing it and writing new HTML in your second for loop if there are matches. It would be better to write 'results not found' after searching the entire array. You can do this by first checking if studentsFound has length.

if(studentsFound.length) {
  //loop through studentsFound and print results
 for (var i = 0; i < studentsFound.length; i++) {
      print(buildOutput(studentsFound));
    }
} else {
  print("<i>A user with the name: <b>" + searchField.value + "</b> was not found. Please try another search.</i>");
}

Be careful when naming your functions as well. Print() is a native js function that prints the page, so you're overriding it in this situation. It's not really important here but it's a good idea to stay away from overriding things. To be a little more modular you could also write this function to accept an element as an argument as well. That way if you want to add more divs later you don't have to write separate yet nearly identical functions for each one.

function printMessage(message, element) {
   document.getElementById(element).innerHTML = message;
}

The last thing I would suggest is really more along the lines of style. Personally I prefer using native array functions over loops where possible, as they let you do much more without having to write separate helper functions. I know you purposely passed a named function to your 'click' eventListener, that seems fine to me. Here is my solution using an anonymous one, no global variables, and native array functions.

// Add an eventlistener that listens for click event on the searchBtn. Once clicked it runs the 'searchForStudent' function.
searchBtn.addEventListener('click', function() {
  var test = document.getElementById("searchBox").value.toLowerCase();
  var outputDiv = document.getElementById('output');

  //Populate studentsFound by filtering students array to return only matches
  var studentsFound = students.filter(function(e) {
    return e.name.toLowerCase() === test;
  });

  // Reset ouputDiv on each click
  outputDiv.innerHTML = "";

  // If any match loop through matches and build output divs html
  if(studentsFound.length) {
    studentsFound.forEach(function(e, i) {
      var html = '';

      html +=  '<small>Result #' + (i + 1) + '</small><hr>';
      html += '<p>Name: <b>' + e.name + '</b></p>';
      html += '<p>Track: ' + e.track + '</p>';
      html += '<p>Achievements: ' + e.achievements + '</p>';
      html += '<p>Points: ' + e.points + '</p>';

      outputDiv.innerHTML += html;
    });
  }
  // If no matches show user no results for search were found
  else outputDiv.innerHTML = "<i>A user with the name: <b>" + test + "</b> was not found. Please try another search.</i>";
});

Again this is just personal style but doing it this way lets me keep the global namespace completely free and write the entire app in a few short lines with anonymous functions. If you had several buttons to add 'click' events to I would suggest leaving the elements as global namespace objects so you don't have to repeat getting them in every function.

Hopefully this was of some help. I think your code works great. You're definitely better than when I first started! Keep up the good work and If you have any questions please feel free to ask!