Add support to IE11

[Borrajo]

in ie11 the tooltip did not follow the cursor. with this modification it is solved.

• The pull request is complete according to the Definition of Done
  • Acceptance criteria in the ticket have been met
  • Automated tests are written according to the test plan
  • The documentation is up-to-date
  • Deployment automation includes newly introduced environment variables and credentials are added to the credentials.fact file of all servers
• The pull request has a descriptive title that describes what has changed, and provides enough context for the changelog
• When applicable, the pull request title starts with the issue number

[lukbukkit]

Thanks a lot for your pull request. Did you test your changes also in other browsers?

[Borrajo]

Thanks a lot for your pull request. Did you test your changes also in other browsers?

Tested in :

• Google Chrome
• Mozilla Firefox
• Internet Explorer 11
• Microsoft Edge

Not tested in:

• Safari.

Documentation:
https://developer.mozilla.org/en-US/docs/Web/API/Window/pageXOffset

https://developer.mozilla.org/en-US/docs/Web/API/Window/scrollX

[lukbukkit]

According to your linked MDN article this change should be fine and increase browser compatibility.

The pageXOffset property is an alias for the scrollX property:

[lukbukkit]

Thanks for your contribution. The latest version 0.1.3 is now up on npm.