fix typos

readme.md

@@ -47,7 +47,7 @@ task(itemsSelector:string, fieldSelectors:string, urlTemplate:string, pages:numb
 // a task extracting data from a list of pages
 task(itemsSelector:string, fieldSelectors:string[], urls:string[])
 // a task extracting data of urls which extracted from last task result
-task(itemsSelector:string, fieldSelectors:string[], urls:ExractResult)
+task(itemsSelector:string, fieldSelectors:string[], urls:ExtractResult)
 ```
 
 ## Advanced Usage

scripts/extract.js

@@ -153,7 +153,8 @@ function sendMessage(tab, req, cond, interval) {
             console.log("request for", req.from);
             let tabAvailable = await getTabByID(tab.id);
             if (!tabAvailable) {
-                throw new Error("Task interupted due to the target tab is closed.");
+                reject("Task interupted due to the target tab is closed.");
+                return;
             }
 
             chrome.tabs.sendMessage(tab.id, req, r => {
@@ -183,6 +184,7 @@ async function getActiveTab(currentWindow) {
 async function getTabByID(id) {
     return new Promise((resolve, reject) => {
         chrome.tabs.get(id, function (tab) {
+            chrome.runtime.lastError;
             resolve(tab);
         })
     })

scripts/extractor.js

@@ -47,7 +47,7 @@ class Extractor {
                 this._results[this._tasks[this._tasks.length - 1]] = result;
                 this.save();
             }
-        );
+        ).catch(err => console.log(err));
     }
     /**
      * restart from specified task, but don't restart the previous tasks.
@@ -76,7 +76,7 @@ class Extractor {
                 this._results[this._tasks[this._tasks.length - 1]] = result;
                 this.save();
             }
-        );
+        ).catch(err => console.log(err));
     }
     /**
      * Save result of a task

scripts/result.js

@@ -1,4 +1,4 @@
-class ExractResult {
+class ExtractResult {
     constructor(data) {
         this._data = data || [];
 

scripts/tools.js

@@ -12,7 +12,7 @@ task(itemsSelector:string, fieldSelectors:string[])
 task(itemsSelector:string, fieldSelectors:string[], url:string, from:number, to:number, interval:number)
 task(itemsSelector:string, fieldSelectors:string, url:string, pages:number[])
 task(itemsSelector:string, fieldSelectors:string[], urls:string[])
-task(itemsSelector:string, fieldSelectors:string[], urls:ExractResult)
+task(itemsSelector:string, fieldSelectors:string[], urls:ExtractResult)
 
 See detail help in:
 https://git.jebbs.co/jebbs/data-extracter-extesion
@@ -70,7 +70,7 @@ function testArgs(...args) {
                         args[2] instanceof Array &&
                         testArrayVals(args[2], v => typeof v == "string")
                     ) || (
-                        args[2] instanceof ExractResult
+                        args[2] instanceof ExtractResult
                     )
                 );
         case 4: