Opens a dialog the user can use while still working in the sheet.
class SpreadsheetApp method .showModelessDialog()
SpreadsheetApp is the Apps Script service.
.showModelessDialog() is the method name you will see after a dot in your code.
What it does
Why it's used
- Keep a helper window open while the user still edits the sheet.
- Show live search or preview without blocking the grid.
Common errors
- Forgetting parentheses on showModelessDialog. Write SpreadsheetApp.showModelessDialog(), not SpreadsheetApp.showModelessDialog or showModelessDialog by itself.
- Skipping dots between chained calls. Each step needs a dot, like SpreadsheetApp.getActiveSpreadsheet().getSheetByName('Data').showModelessDialog().
- Adding spaces where they do not belong. Write SpreadsheetApp.showModelessDialog(), not SpreadsheetApp .showModelessDialog(), SpreadsheetApp.showModelessDialog (), or SpreadsheetApp . showModelessDialog().
- Wrong capitalization. Use SpreadsheetApp and showModelessDialog, not spreadsheetapp or showmodelessdialog.
Explore
Related methods
-
.showModalDialog()
Opens a modal dialog that blocks interaction with the sheet.
-
.prompt()
Shows a dialog that asks the user for text input.
-
.alert()
Shows a simple alert box with an OK button.
-
.activate()
Makes a sheet or range the active selection.
-
.toast()
Shows a short message in the bottom corner of the spreadsheet.
More Apps Script
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Related blog posts
Written guides about SpreadsheetApp.showModelessDialog().
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