I am wondering if I have found a minor bug with LWCs. I have noticed that row numbers in a data table are turned on if one of the columns is set to "Editable" even if the "show-row-number-column" isn't present.

I have created a simple playground (linked below) to illustrate this potential bug. Note, that "show-row-number-column" isn't on the data table yet the row numbers are displayed. As soon as you set all of the columns to editable:false the row number will go away.

This may be the expected behavior, but I couldn't find it documented anywhere. Of course, this isn't a big deal at all, but for my specific use case, it does make it a little confusing for the end-user.

 <!-- Note how "show-row-number-column" isn't selected 
    yet the row numbers are still dislayed -->


1 Answer 1


This is an expected behavior and is documented:

By making a column editable, the show-row-number-column attribute is always true and the number column is displayed.

  • 1
    Thanks, I definitely didn't recall that line in the error section. It does make sense that the row numbers are required since the errors reference the numbers.
    – Tim Wilson
    Commented Oct 7, 2019 at 19:23

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .