Google Script - Sidebar button keeps opening a new tab

Question

I\'m creating an extremely basic script to assist me in one of my google spreadsheets.

I\'ve successfully got a sidebar showing, with a few buttons (which function).

Answer 1

When I saw your issue, I thought that this is due to

. So I proposed the following modifications.

1. Modify to .

2. Modify to .

3. Remove .

Note:

• I think that @TheMaster's answer is more useful information.

References:

• Event.preventDefault()
• The Document Base URL element