app/assets/javascripts/assignment_form.js
function importOptions(starterCodeFieldValue) {
const importOptions = document.getElementById('import-options');
if (starterCodeFieldValue.length > 0) {
importOptions.style.display = '';
} else {
importOptions.style.display = 'none';
}
}
function removeErrorBox(el) {
var parent = el.closest(".errored");
if (!parent) return;
var errorBox = parent.querySelector(".error");
parent.classList.remove("errored");
errorBox && errorBox.remove();
}