What replaces Option Explicit in Google Sheets?
Option Explicit forces variable declarations in VBA. Apps Script uses JavaScript const and let, and linters or TypeScript-style discipline replace the VBA guardrail. Name variables clearly and avoid implicit globals in triggers and menu handlers.
When to use it
Use explicit const and let when porting large VBA modules to Apps Script.
When to skip it
Skip worrying about Option Explicit when the script is a short recorded macro.
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