How to insert a console.log in material-ui elements to verify object/array/value

Question

I am getting an error from react js when I execute this code snippet:

<TableBody>
  { (data.length > 0) ? (
    data.map((x, i) => row(
    x,
    i,
    formColumns,
    handleRemove,
    handleSelect,
    editIdx
    ))) : (<TableRow><TableCell colSpan={`${cols}`}>No Data</TableCell></TableRow>)}
</TableBody>

The value of 'data' is an empty array [], which SHOULD return a length of 0 But it passes the length test somehow.

Instead I get an error 'data.map is not a function'.

I am trying to insert:

console.log('data = ' + JSON.Stringify(data, null, 2) + '.'))

in the code somewhere, so I can see what it's doing. When I check the data GOING IN to the Table, it's = []. So why is the length not working, and what do I need to do to place javascript code inside a set of material-ui elements? Any help would be much appreciated!

Arthur Rubens · Accepted Answer · 2020-07-06 08:10:00Z

0

Something like:

{ console.log('data = ' + JSON.Stringify(data, null, 2) + '.')) }

answered Jul 6, 2020 at 8:10

Arthur Rubens

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2 Comments

Andrew H Over a year ago

The problem is, I never GET to the location where you place the console.log statement. I need it BEFORE the 'row.map' line. One of the things I tried last night was to wrap the console.log in curly brackets. I STILL rec'd an error. Could you show how to put the console.log statement BEFORE the row.map (ie right after the the <TableBody> statement. This is where I get an error now matter HOW I try to frame the js statement.

Arthur Rubens Over a year ago

Ok, then may you provide codesandbox.io with a working fragment of your code?

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