init

popup/popup.js

@@ -0,0 +1,10 @@
+$().ready(
+    () => $("#doExtract").on('click', doExtract)
+);
+
+function doExtract() {
+    let fname = $("#formFileName")[0].value;
+    let itemSelector = $("#formItemSelector")[0].value;
+    let fieldSelectors = $("#formFieldSelector")[0].value.split('\n').map(s => s.trim());
+    eval($("#formFieldSelector")[0].value);
+}