JavaScript Expert

Job ID: 34191957

Budget: $30 – $60 USD

Make a simple javascript app to detect timing of other tab open.
After clicking a button, the js app should count the seconds of other tab opening.
If I close the other tab before 15s, then the app emit an alert.
If you are able to make the app with create-react-app, it is preferable.
I need a simple UI with one button and texts only.
I recorded how it works.
https://www.loom.com/share/f081256f23da4e178cc4376d723bd01d