This article explains how the filtering criteria of Google Sheets slicers can be reset using a few lines of Apps Script code. Two different approaches are shown. The first one uses the Spreadsheet Service, while the second one draws upon the Google Sheets API using the Advanced Sheets Service. Additionally, some shortcomings and peculiarities of both methods are highlighted.
Kudos to Pablo Felip for taking the time to explore and write-up this post about Google Sheets ‘slicers’. It contains some very useful tips and advice about interacting with them using Google Apps Script.
Source: Bulk reset slicers in a Google Spreadsheet, the Apps Script way
Member of Google Developers Experts Program for Google Workspace (Google Apps Script) and interested in supporting Google Workspace Devs.