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Loading Control - Facebook SDK for JavaScript - Documentation - Meta for Developers
Loading Control
The method FB.Canvas.setDoneLoading
calls you back with an integer, in milliseconds, of the timing of the page load, beginning from the time when the first bytes arrive on the client, and ending from the point at which you call this function.
The point at which you call it is up to you; in general, choose a point at which the user will be able to interact meaningfully with your application.
If you want to exclude certain parts of the page load, use stopTimer and startTimer . These methods will stop and start the load timer respectively.
Examples
To simply report when your application is ready, call
FB.Canvas.setDoneLoading();
To use that information yourself, specify a callback. Here we pop up a dialog to display the application load time.
FB.Canvas.setDoneLoading(
function (result) {
alert(result.time_delta_ms);
}
);
Parameters
Name Type Required Description callback
Function
no
(optional) A function called back with the page load time.
Returns
This function returns an object with a single property, time_delta_ms
.
Property Type Description Argument time_delta_ms
Integer
Load time, in milliseconds.
Required