Get a dynamic range in google sheets - google-apps-script

Question

I have a function that takes a table's range and then emails it every day. Currently it is set up to get a fixed range (G2:H38). The process currently works, but every day I send the email, I have a handful of blank cells that are also sent out. I am new to this and hoping someone can help me solve for this.
var rowData = data[i];
var emailAddress = "example#gmail.com";
var recipient = rowData[0];
var yesterdayDate = rowData[5];
var message1 = rowData[2] + yesterdayDate;
var message2 = rowData[3]
var sh = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet();
var data = sh.getRange("G2:H38").getValues();
//var htmltable =[];
var TABLEFORMAT = 'cellspacing="2" cellpadding="2" dir="ltr" border="1" style="width:100%;display:table;max-width:400px;table-layout:fixed;font-size:10pt;font-family:arial,sans,sans-serif;border-collapse:collapse;border:1px solid #ccc;font-weight:normal;color:black;background-color:white;text-align:center;text-decoration:none;font-style:normal;margin-top:30px'
var htmltable = '<table ' + TABLEFORMAT +' ">';
var tablehead = 'style="background-color:#6aa84f;color:white;';
for (row = 0; row<data.length; row++){
htmltable += '<tr>';
for (col = 0 ;col<data[row].length; col++){
if (data[row][col] === "" || 0) {htmltable += '<td>' + '' + '</td>';}
else
if (row === 0) {
htmltable += '<th ' + tablehead +' ">' + data[row][col] + '</th>';
}
else {htmltable += '<td>' + data[row][col] + '</td>';}
}
htmltable += '</tr>';
}

Answer 1

In your second for loop, first condition catches and appends empty table cells for cell values that have no data in them. Adding a 0 check does not help here as you should check for data[row][col]===0 if you want to match values that equal 0, not ||0.
Otherwise, your code works as intended and testing it on a sample Spreadsheet works - "if cell in Range is empty, append empty cell to table". Do you want to filter out all empty cells?
Update
I am still unsure why you would like to filter out empty cells from the HtmlTable, but if you want only the ones with data to be shown, change your if...else statement a little to account for that:
if (row===0&&data[0][col]!=='') { //filter out empty header cells;
htmltable += '<th>' + data[row][col] + '</th>';
}else if(data[row][col]!=='') { //filter out empty entries cells
htmltable += '<td style="border:1px solid black;">' + data[row][col] + '</td>';
}