marktielbeek marktielbeek - 3 months ago 30
Javascript Question

Returning a serverside datatable to client with google App Script

I want to return a datatable I created in google apps script with data from a Spreadsheet to the client. I use a succesHandler to get the data and use this to create a chart. The only problem i have is that my data is null. It seems i can't return a datatable object to the client page.

I need to send it to the client, because Google Apps script is deprecating the UIApp functions so i need the google.visualization functions in the Client.

function doGet() { return HtmlService.createHtmlOutputFromFile('Index.html')

function getDataTable()
var bestanden = DriveApp.searchFiles('title contains "' + "kwalrap" + '"');
while (bestanden.hasNext())
var bestand =;
var docid = ( bestand.getId() );
var sheets= SpreadsheetApp.openById(docid).getSheets();
//vanaf sheet 0. tot hij bij de laatset sheet is. dan steeds 2 sheets verder.
for(var j = 0; j < 2; j = j+1)
var sheet = sheets[j];
var range = sheet.getRange(2,1,sheet.getLastRow(),8);
var inforange = sheet.getRange(2,1,1,8);
var values = range.getValues();
var infovalues = inforange.getValues();
var data = Charts.newDataTable()
.addColumn(Charts.ColumnType.STRING, "Tijd")
.addColumn(Charts.ColumnType.NUMBER, "dco")
.addColumn(Charts.ColumnType.NUMBER, "dcp")
.addColumn(Charts.ColumnType.NUMBER, "dct")
.addColumn(Charts.ColumnType.NUMBER, "dcz")
.addColumn(Charts.ColumnType.NUMBER, "ldc")
.addColumn(Charts.ColumnType.NUMBER, "lv")

for(var i = 0; i < sheet.getLastRow()-1; i++)
var dataTable =;
return dataTable;
// return JSON.stringify(values);


<script type="text/javascript" src=""></script>
<script type="text/javascript">

google.load("visualization", "1", {packages:["corechart"]});

function onSuccess(data) {
var options = {
title: 'Why doesn't this work'
new google.visualization.LineChart(
document.getElementById('visualization_div')).draw(data, options);

<div id="visualization_div" style="width: 600px; height: 380px;';"></div>

why is my data variable null in the onSuccesHandler and how do i get the datatable in the client

Thanks for your help


Its because you need to return a plain javascript array, not a data table which is purely a server-side object.