Web Reference: The TypeError: Cannot convert undefined or null to object is a preventable error that occurs when you don't account for potentially "empty" variables. When using object utilities like Object.keys(), the recommended best practice is to provide a default value with the nullish coalescing operator (??): Learn how to fix the common JavaScript error TypeError: Cannot Convert Undefined Or Null To Object with easy-to-follow solutions and tips. Understand why this error occurs and how to prevent it in your code. Apr 21, 2025 · To resolve this issue, you can add a step to filter out rows where these fields are null before performing the grouping. Here's an updated version of your logic: // Filter out rows with null values in the grouping fields.
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