Using if else in reactjs render

How can I use if else inside div tags?

I want a use like here. So if customer.info is empty or -1 then it shows the code below, if not it doesn't show it

I made a few tries but couldn't.

 if (this.props.customerInfo.customer === "-1") {
  <TableEditColumn
                showAddCommand
                showEditCommand
                showDeleteCommand
                commandComponent={Command}
              />
 }



render() {
    if (!isLoaded) {
      return <div>Loading</div>;
    } else {
      return (
        <div>
          <Paper>
            <Grid
              rows={this.state.treatmentItems}
              columns={this.state.columns}
            >
              <EditingState
                onCommitChanges={this.commitChanges}
              />

              <Table />
              <TableColumnResizing
                defaultColumnWidths={this.state.defaultColumnWidths}
              />
             
              <TableEditRow />
              <TableEditColumn
                showAddCommand
                showEditCommand
                showDeleteCommand
                commandComponent={Command}
              />
            </Grid>
          </Paper>

        </div>
      );
    }
  }