FusionWidgets allows you to control few aspects of the message logger using its client-side JavaScript API. Basically, you can do the following:

• Show/hide the logger using client-side JavaScript
• Clear the logger using client-side JavaScript

Here, we'll see how to do these.

Please note that Message Logger feature is not supported in JavaScript charts.

You can manipulate the message logger using JavaScript APIs. For this, you need to get the reference to the chart. To get the reference to a chart, you can use the DOMID of the chart and pass it using any of the following ways:

var chartRef = FusionCharts("myChartId");

or

var chartRef = FusionCharts.items["myChartId"]; 

The legacy function getChartFromId() still works as show below:

var chartRef =  getChartFromId("myChartId"); 

However, note that getChartFromId() has been deprecated.

You can call the JavaScript APIs of a chart only after it has rendered. You can use the FC_Rendered event tracker or the Rendered event listener to check if a chart has rendered. For more information, please see FusionWidgets & JavaScript section.

Once the reference to chart is attained, you can use any of the functions below on the chart's logger (provided it's set to on):

• chartRef.showLog() - To show the log, if it's not already visible.
• chartRef.hideLog() - To hide the log, if it's visible.
• chartRef.clearLog() - To clear the contents of log.

If you get JavaScript errors when accessing the above functions, make sure of following:

1. You've enabled the message logger for the chart.
2. You're accessing these functions after the chart has rendered (i.e., in FC_Rendered event tracker code block or in the Rendered event listener)
3. You're not running the chart from local file system (i.e., C:\, D:\ etc.). Instead, run it from a server (localhost or remote server). This is because the Flash Player security settings do not allow chart to JavaScript interaction on local file system by default, unless otherwise specifically set.