Add basis for exercise as well as task description

js/continent.js

@@ -0,0 +1,19 @@
+const continentCode = new URLSearchParams(window.location.search).get("code");
+const countryList = document.getElementById("country-list");
+fetch("https://countries.trevorblades.com/", {
+    "method": "POST",
+    "body": JSON.stringify(
+        {
+            query: "", // Fill in Query here
+            "operationName": "continent",
+            "variables": { "code": continentCode }
+        }), headers: { "Content-Type": "application/json" }
+}).then(response => response.json()).then(({ data }) => {
+    document.getElementById("continent-heading").innerText = data.continent.name;
+    const countries = data.continent.countries;
+    for (const country of countries) {
+        const newListItem = document.createElement("li");
+        newListItem.innerHTML = `<a href="/country.html?code=${country.code}"> ${country.name} </a>`;
+        countryList.append(newListItem);
+    }
+});