add: getLatestVersion()

get-latest-version.js

@@ -0,0 +1,32 @@
+let getLatestVersion = function() {
+  return new Promise((resolve, reject) => {
+    // if (typeof milliseconds !== "number") {
+    //   throw new Error("milleseconds not a number");
+    // }
+
+    const xmlHttpRequest = new XMLHttpRequest();
+    xmlHttpRequest.onreadystatechange = function() {
+      if (this.readyState == 4 && this.status == 200) {
+        if (this.response) {
+          const latestURL = this.response["assets"][0].browser_download_url;
+          console.log(latestURL);
+          const latestVersion = latestURL.match(/(\d+).(\d+).(\d+)/g)[0];
+          console.log(latestVersion);
+          return latestVersion;
+        }
+      }
+    };
+
+    xmlHttpRequest.open(
+      "GET",
+      "https://api.github.com/repos/gohugoio/hugo/releases/latest",
+      true
+    );
+    xmlHttpRequest.responseType = "json";
+    xmlHttpRequest.send(null);
+
+    resolve(version);
+  });
+};
+
+module.exports = getLatestVersion;