In JS there are 8 values that evaluate to false in a boolean context: undefined, null, 0, -0 (different from 0), 0n (BigInt 0), NaN, false and the empty string. The interesting (and as of yet unanswered) question is how to handle string cells with a numeric value of 0 or a boolean value of false. Your code would render both values as empty strings, whereas my code would render the numeric 0 as "0" and the boolean false as "false". Thoughts?

Thank you for the great feedback and opportunity to dig into the code. I really appreciate your time.
So the goal is to only render an empty string if the value of cell.v is undefined, null or NaN, otherwise convert the value of the string to a primitive and assign it to textp?

If so here is my idea, feel free to skip over this if I interpreted what you meant wrong.

IDEA:
My thoughts are to use the original ternary statement combined with extra checks and a function to convert the cell.v value to a primitive.

Ultimately the code that passed all tests was:

textp = (cell.v === undefined || cell.v === null || isNan(cell.v.toString)) ? "" : JSON.parse(cell.v);

This code assigns the primitive value of the cell to the variable unless it is undefined, null or NaN.
I added a isNaN(cell.v.toString) to pass both the NaN test together. IsNaN() without toString() failed the 0n test.

The function JSON.parse turns a string into JSON, and for this purpose, it essentially turns strings into primitives.

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Let me know if this addresses the issue you brought up or if I missed the mark.

Thank you again for the feedback. I really enjoy learning more by solving problems.