diff --git a/scripts/extract.js b/scripts/extract.js
index a3843f9..395aefc 100644
--- a/scripts/extract.js
+++ b/scripts/extract.js
@@ -27,7 +27,7 @@ async function getData(itemsSelector, fieldSelectors, ...args) {
         let arg = args.shift();
         if (arg instanceof Array) {
             urls = arg;
-        } else if (arg instanceof ExractResult) {
+        } else if (arg instanceof ExtractResult) {
             urls = arg.squash().filter(v => !!v);
         } else {
             let urlTempl = arg;
@@ -66,7 +66,7 @@ async function getData(itemsSelector, fieldSelectors, ...args) {
         pms.then(
             results => {
                 data.push(...results);
-                resolve(new ExractResult(data));
+                resolve(new ExtractResult(data));
             },
             err => reject(err)
         );
@@ -153,7 +153,7 @@ function sendMessage(tab, req, cond, interval) {
             console.log("request for", req.from);
             let tabAvailable = await getTabByID(tab.id);
             if (!tabAvailable) {
-                reject("Task interupted due to the target tab is closed.");
+                reject("Task interrupted due to the target tab is closed.");
                 return;
             }