diff --git a/.github/workflows/npmpub.yml b/.github/workflows/npmpub.yml
index 070805a..b8f067b 100644
--- a/.github/workflows/npmpub.yml
+++ b/.github/workflows/npmpub.yml
@@ -22,6 +22,7 @@ jobs:
 
     - run: npm install
     - run: npm run pack
+    - run: npm run test:headless:singleRun
     - run: cp README.md ./src/lib/dist/README.md
     - uses: JS-DevTools/npm-publish@v1
       with:
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index aeeda22..6de36e6 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -2,9 +2,8 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="6d9e6998-eced-4f47-8fb4-3257db3e18e7" name="Default" comment="Version upgrade 1.2.8">
+      <change beforePath="$PROJECT_DIR$/.github/workflows/npmpub.yml" beforeDir="false" afterPath="$PROJECT_DIR$/.github/workflows/npmpub.yml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/package-lock.json" beforeDir="false" />
       <change beforePath="$PROJECT_DIR$/package.json" beforeDir="false" afterPath="$PROJECT_DIR$/package.json" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
@@ -53,7 +52,7 @@
       <recent name="$PROJECT_DIR$/examples/dev" />
     </key>
   </component>
-  <component name="RunManager" selected="npm.pack">
+  <component name="RunManager" selected="npm.test:headless:singleRun">
     <configuration name="build" type="js.build_tools.npm" temporary="true" nameIsGenerated="true">
       <package-json value="$PROJECT_DIR$/src/lib/package.json" />
       <command value="run" />
@@ -84,16 +83,6 @@
       <envs />
       <method v="2" />
     </configuration>
-    <configuration name="start (1)" type="js.build_tools.npm" temporary="true" nameIsGenerated="true">
-      <package-json value="$PROJECT_DIR$/package.json" />
-      <command value="run" />
-      <scripts>
-        <script value="start" />
-      </scripts>
-      <node-interpreter value="project" />
-      <envs />
-      <method v="2" />
-    </configuration>
     <configuration name="test (1)" type="js.build_tools.npm" temporary="true" nameIsGenerated="true">
       <package-json value="$PROJECT_DIR$/package.json" />
       <command value="run" />
@@ -104,20 +93,30 @@
       <envs />
       <method v="2" />
     </configuration>
+    <configuration name="test:headless:singleRun" type="js.build_tools.npm" temporary="true" nameIsGenerated="true">
+      <package-json value="$PROJECT_DIR$/package.json" />
+      <command value="run" />
+      <scripts>
+        <script value="test:headless:singleRun" />
+      </scripts>
+      <node-interpreter value="project" />
+      <envs />
+      <method v="2" />
+    </configuration>
     <list>
-      <item itemvalue="npm.start (1)" />
       <item itemvalue="npm.test (1)" />
       <item itemvalue="npm.build" />
       <item itemvalue="npm.publish" />
       <item itemvalue="npm.pack" />
+      <item itemvalue="npm.test:headless:singleRun" />
     </list>
     <recent_temporary>
       <list>
+        <item itemvalue="npm.test:headless:singleRun" />
         <item itemvalue="npm.pack" />
         <item itemvalue="npm.publish" />
         <item itemvalue="npm.build" />
         <item itemvalue="npm.test (1)" />
-        <item itemvalue="npm.start (1)" />
       </list>
     </recent_temporary>
   </component>
@@ -155,7 +154,9 @@
       <workItem from="1572945589004" duration="252000" />
       <workItem from="1581498853844" duration="6408000" />
       <workItem from="1581516389687" duration="1254000" />
-      <workItem from="1584040192080" duration="5962000" />
+      <workItem from="1584040192080" duration="6735000" />
+      <workItem from="1584358226923" duration="31000" />
+      <workItem from="1584358330750" duration="76000" />
     </task>
     <task id="LOCAL-00001" summary="Ref: clean code&#10;Ref: update examples">
       <created>1557130876740</created>
@@ -223,30 +224,30 @@
       <screen x="1920" y="960" width="1920" height="1080" />
     </state>
     <state x="2613" y="1249" width="524" height="509" key="#com.intellij.refactoring.safeDelete.UnsafeUsagesDialog/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@1920.960.1920.1080" timestamp="1584044666474" />
-    <state width="1897" height="242" key="GridCell.Tab.0.bottom" timestamp="1584046025683">
-      <screen x="1920" y="960" width="1920" height="1080" />
+    <state width="1897" height="222" key="GridCell.Tab.0.bottom" timestamp="1584358257559">
+      <screen x="0" y="27" width="1920" height="1011" />
     </state>
     <state width="1897" height="242" key="GridCell.Tab.0.bottom/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@0.219.1920.1080" timestamp="1584040732589" />
-    <state width="1897" height="242" key="GridCell.Tab.0.bottom/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@1920.960.1920.1080" timestamp="1584046025683" />
-    <state width="1897" height="242" key="GridCell.Tab.0.bottom/0.27.1920.1011/1920.0.1920.1080@0.27.1920.1011" timestamp="1581516934990" />
-    <state width="1897" height="242" key="GridCell.Tab.0.center" timestamp="1584046025683">
-      <screen x="1920" y="960" width="1920" height="1080" />
+    <state width="1897" height="242" key="GridCell.Tab.0.bottom/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@1920.960.1920.1080" timestamp="1584046993665" />
+    <state width="1897" height="222" key="GridCell.Tab.0.bottom/0.27.1920.1011/1920.0.1920.1080@0.27.1920.1011" timestamp="1584358257559" />
+    <state width="1897" height="222" key="GridCell.Tab.0.center" timestamp="1584358257558">
+      <screen x="0" y="27" width="1920" height="1011" />
     </state>
     <state width="1897" height="242" key="GridCell.Tab.0.center/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@0.219.1920.1080" timestamp="1584040732589" />
-    <state width="1897" height="242" key="GridCell.Tab.0.center/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@1920.960.1920.1080" timestamp="1584046025683" />
-    <state width="1897" height="242" key="GridCell.Tab.0.center/0.27.1920.1011/1920.0.1920.1080@0.27.1920.1011" timestamp="1581516934990" />
-    <state width="1897" height="242" key="GridCell.Tab.0.left" timestamp="1584046025683">
-      <screen x="1920" y="960" width="1920" height="1080" />
+    <state width="1897" height="242" key="GridCell.Tab.0.center/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@1920.960.1920.1080" timestamp="1584046993665" />
+    <state width="1897" height="222" key="GridCell.Tab.0.center/0.27.1920.1011/1920.0.1920.1080@0.27.1920.1011" timestamp="1584358257558" />
+    <state width="1897" height="222" key="GridCell.Tab.0.left" timestamp="1584358257558">
+      <screen x="0" y="27" width="1920" height="1011" />
     </state>
     <state width="1897" height="242" key="GridCell.Tab.0.left/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@0.219.1920.1080" timestamp="1584040732588" />
-    <state width="1897" height="242" key="GridCell.Tab.0.left/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@1920.960.1920.1080" timestamp="1584046025683" />
-    <state width="1897" height="242" key="GridCell.Tab.0.left/0.27.1920.1011/1920.0.1920.1080@0.27.1920.1011" timestamp="1581516934990" />
-    <state width="1897" height="242" key="GridCell.Tab.0.right" timestamp="1584046025683">
-      <screen x="1920" y="960" width="1920" height="1080" />
+    <state width="1897" height="242" key="GridCell.Tab.0.left/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@1920.960.1920.1080" timestamp="1584046993665" />
+    <state width="1897" height="222" key="GridCell.Tab.0.left/0.27.1920.1011/1920.0.1920.1080@0.27.1920.1011" timestamp="1584358257558" />
+    <state width="1897" height="222" key="GridCell.Tab.0.right" timestamp="1584358257558">
+      <screen x="0" y="27" width="1920" height="1011" />
     </state>
     <state width="1897" height="242" key="GridCell.Tab.0.right/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@0.219.1920.1080" timestamp="1584040732589" />
-    <state width="1897" height="242" key="GridCell.Tab.0.right/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@1920.960.1920.1080" timestamp="1584046025683" />
-    <state width="1897" height="242" key="GridCell.Tab.0.right/0.27.1920.1011/1920.0.1920.1080@0.27.1920.1011" timestamp="1581516934990" />
+    <state width="1897" height="242" key="GridCell.Tab.0.right/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@1920.960.1920.1080" timestamp="1584046993665" />
+    <state width="1897" height="222" key="GridCell.Tab.0.right/0.27.1920.1011/1920.0.1920.1080@0.27.1920.1011" timestamp="1584358257558" />
     <state x="2100" y="1057" width="1536" height="901" key="MergeDialog" timestamp="1584041943170">
       <screen x="1920" y="960" width="1920" height="1080" />
     </state>
@@ -255,11 +256,11 @@
       <screen x="1920" y="960" width="1920" height="1080" />
     </state>
     <state x="2585" y="1218" width="580" height="571" key="MultipleFileMergeDialog/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@1920.960.1920.1080" timestamp="1584041950044" />
-    <state x="2515" y="1212" width="886" height="578" key="find.popup" timestamp="1584044814605">
-      <screen x="1920" y="960" width="1920" height="1080" />
+    <state x="595" y="263" width="886" height="578" key="find.popup" timestamp="1584358232711">
+      <screen x="0" y="27" width="1920" height="1011" />
     </state>
     <state x="2515" y="1212" width="886" height="578" key="find.popup/0.219.1920.1080/1920.0.1280.960/1920.960.1920.1080@1920.960.1920.1080" timestamp="1584044814605" />
-    <state x="595" y="263" width="730" height="538" key="find.popup/0.27.1920.1011/1920.0.1920.1080@0.27.1920.1011" timestamp="1581517068558" />
+    <state x="595" y="263" width="886" height="578" key="find.popup/0.27.1920.1011/1920.0.1920.1080@0.27.1920.1011" timestamp="1584358232711" />
     <state x="685" y="364" width="540" height="343" key="vcs.readOnlyHandler.ReadOnlyStatusDialog" timestamp="1581516396481">
       <screen x="0" y="27" width="1920" height="1011" />
     </state>
diff --git a/package.json b/package.json
index f8c7333..f8b9e4d 100644
--- a/package.json
+++ b/package.json
@@ -7,6 +7,7 @@
     "build": "./node_modules/.bin/ng build --aot --prod",
     "test": "./node_modules/.bin/ng test",
     "test:headless": "./node_modules/.bin/ng test --browsers=ChromeHeadlessDebug",
+    "test:headless:singleRun": "./node_modules/.bin/ng test --browsers=ChromeHeadlessDebug --watch false",
     "lint": "./node_modules/.bin/ng lint",
     "e2e": "./node_modules/.bin/ng e2e",
     "pack": "./node_modules/.bin/ng-packagr -p ./src/lib/package.json"