Dear Daniel, thank you very much for your hints. I think the main problem is the obsolete load of the google charts library, as I have the same problem with all my html, where I use it.
So I already tried to follow the instructions at https://developers.google.com/chart/interactive/docs/basic_load_libs#update-library-loader-code . But with no effect. Maybe you can have a look at another example, which is the actual code and which is a little bit smaller (sorry, but I did not find a way to mark it as code this time): <html> <head> <meta http-equiv="refresh" content="8; URL= http://<IP>:<PORT>/Antwortzeiten_Nbg.html"> <!--Load the AJAX API--> <!-- OBSOLETE: <script type="text/javascript" src=" https://www.google.com/jsapi";></script>--> <script src="https://www.gstatic.com/charts/loader.js";></script> <script type="text/javascript" src="// ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script> <!-- OBSOLETE: <script type="text/javascript"> // Load the Visualization API and the piechart package. google.load('visualization', '1', {'packages':['corechart']}); // Set a callback to run when the Google Visualization API is loaded. google.setOnLoadCallback(drawChart);--> <script> google.charts.load('current', {packages: ['corechart']}); google.charts.setOnLoadCallback(drawChart); var Eingabe = ""; var Zaehler = 1; while (Zaehler <= 3) { Zaehler++; function drawChart() { var jsonData = $.ajax({ url: "Antwortzeiten_Nbg.php?", dataType:"json", async: false }).responseText; // Create our data table out of JSON data loaded from server. var data = new google.visualization.DataTable(jsonData); // Instantiate and draw our chart, passing in some options. var chart = new google.visualization.LineChart(document.getElementById('chart_div')); chart.draw(data, {width: 400, height: 240}); } window.setTimeout(drawChart(), 5000); } </script> </head> <body> <!--Div that will hold the pie chart--> <div id="chart_div"> <script> function drawChart() { var jsonData = $.ajax({ url: "Antwortzeiten_Nbg.php", dataType:"json", async: false }).responseText; // Create our data table out of JSON data loaded from server. var data = new google.visualization.DataTable(jsonData); // Instantiate and draw our chart, passing in some options. var chart = new google.visualization.LineChart(document.getElementById('chart_div')); chart.draw(data, {width: 400, height: 240}); } window.setTimeout(drawChart(), 5000); </script> </div> </body> </html> Daniel LaLiberte schrieb am Donnerstag, 6. August 2020 um 18:02:02 UTC+2: > The problem is due to your window.setTimeout(drawChart(), 10000); This > actually calls drawChart immediately, since you wrote drawChart() rather > than just drawChart. What it does after 10 seconds is try to call the > undefined result of calling drawChart. > > You should wait for google.setOnLoadCallback(drawChart); to call > drawChart after the library has finished loading, at which time > google.visualization.DataTable should be defined. Then, *within* your > drawChart function, you could call drawChart again after a timeout. > > But you have other problems. You have 2 drawChart functions, one in the > head, which references chart_div, which doesn't appear to exist (this first > script appears to have a syntax error, an extra '}' at the end, so maybe it > is ignored), and one in the body, which references the chart_start_div which > *contains* the script that defines drawChart. So assuming only the > second drawChart is used, when the chart is drawn, the script element will > be deleted. What that does to the drawChart function may be undefined, or > it might still exist if it is attached to some other place in the > document. In any event, this is probably not what you want to do. > > Finally, you should follow the instructions at > https://developers.google.com/chart/interactive/docs/basic_load_libs#update-library-loader-code > to update how you load the Google Charts library. Why the behavior of > your page has changed might be due to the jsapi loader redirecting to the > new loader. Difficult to say without seeing how this is working in your > actual web page. If you can point us at that page, we might be able to > help more. > > I hope this helps, though I know I am not giving you a solution, but > mostly just pointing out problems. > > On Thu, Aug 6, 2020 at 5:38 AM RBTCGP <[email protected]> wrote: > >> >> >> Am Donnerstag, 6. August 2020 09:25:43 UTC+2 schrieb RBTCGP: >>> >>> <html> >>> <head> >>> <title>xxxxxxxxxxxxxxxxx</title> >>> <link rel="stylesheet" type="text/css" href="./css/style.css" /> >>> <link rel="stylesheet" href="mystyle.css"> >>> <meta http-equiv="refresh" content="80; URL=http://xxxx";> >>> <!--Load the AJAX API--> >>> <script type="text/javascript" src="https://www.google.com/jsapi >>> "></script> >>> <script type="text/javascript" src="// >>> ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script> >>> >>> <script type="text/javascript"> >>> >>> // Load the Visualization API and the piechart package. >>> google.load('visualization', '1', {'packages':['corechart']}); >>> >>> // Set a callback to run when the Google Visualization API is loaded. >>> google.setOnLoadCallback(drawChart); >>> >>> var ticksArray = [{v: 1, f: '26.11.15'}, {v: 2, f: '09.12.15'}, {v: 3, >>> f: '22.12.15'}, {v: 4, f: '13.01.16'}, {v: 5, f: '27.01.16'}, {v: 6, f: >>> '17.02.16'}, {v: 7, f: '02.03.16'}, {v: 8, f: '16.03.16'}, {v: 9, f: >>> '14.04.16'}, {v: 10, f: '11.05.16'}, {v: 11, f: '04.08.16'}, {v: 12, f: >>> '07.09.16'}, {v: 13, f: '08.12.16'}, {v: 14, f: '19.12.16'}, {v: 15, f: >>> '22.12.16'}, {v: 16, f: '05.04.17'}, {v: 17, f: '11.05.17'}, {v: 18, f: >>> '08.06.17'}, {v: 19, f: '13.07.17'}, {v: 20, f: '28.07.17'}, {v: 21, f: >>> '26.07.18'}, {v: 22, f: '08.08.18'}, {v: 23, f: '29.08.18'}]; >>> >>> var Eingabe = ""; >>> var Zaehler = 1; >>> while (Zaehler <= 3) { >>> >>> Zaehler++; >>> >>> function drawChart() { >>> var jsonData = $.ajax({ >>> url: "Antwortzeiten_XXX.php?", >>> dataType:"json", >>> async: false >>> }).responseText; >>> >>> // Create our data table out of JSON data loaded from server. >>> var data = new google.visualization.DataTable(jsonData); >>> >>> // Instantiate and draw our chart, passing in some options. >>> var chart = new >>> google.visualization.LineChart(document.getElementById('chart_div')); >>> chart.draw(data, {width: 800, height: 240}); >>> } >>> window.setTimeout(drawChart(), 10000); >>> } >>> >>> </script> >>> <meta name="viewport" content="width=device-width, initial-scale=1.0"> >>> >>> </head> >>> >>> >>> <body> >>> >>> <!--Div that will hold the pie chart--> >>> <div id="chart_start_div"> >>> <script> >>> function drawChart() { >>> var jsonData = $.ajax({ >>> url: "XXXXXXX.php?seite=Start", >>> dataType:"json", >>> async: false >>> }).responseText; >>> >>> // Create our data table out of JSON data loaded from server. >>> var data = new google.visualization.DataTable(jsonData); >>> >>> // Instantiate and draw our chart, passing in some options. >>> var chart = new >>> google.visualization.LineChart(document.getElementById('chart_start_div')); >>> >>> chart.draw(data, {explorer:{axis: 'horizontal'}, width: 800, >>> height: 240, hAxis: {ticks: ticksArray}}); >>> } >>> window.setTimeout(drawChart(), 10000); >>> </script> >>> </div> >>> </body> >>> </html> >>> >>> The above code worked for years. >>> Now I get no graph anymore without any change by myself. >>> Maybe there was a change in Google graphs, which makes it necessary to >>> change the code? >>> >>> In the line "var data = new google.visualization.DataTable(jsonData);" >>> I get the error "Uncaught TypeError: Cannot read property 'DataTable' of >>> undefined". >>> >>> The php works fine to provide the JSON-Data. >>> >>> The goal is, that the graph updates itself automatically every 10 >>> seconds. >>> >> >> Also the error remains, when I exchange >> <script type="text/javascript" src="https://www.google.com/jsapi";></ >> script> >> with the line >> >> <script src="https://www.gstatic.com/charts/loader.js";></script> >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google Visualization API" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/google-visualization-api/7c709004-d214-458d-a09d-fba5799578a9o%40googlegroups.com >> >> <https://groups.google.com/d/msgid/google-visualization-api/7c709004-d214-458d-a09d-fba5799578a9o%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > > > -- > Daniel LaLiberte <https://plus.google.com/100631381223468223275?prsrc=2> > [email protected] Cambridge MA > > -- You received this message because you are subscribed to the Google Groups "Google Visualization API" group. 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