Sys.WebForms.PageRequestManager isInAsyncPostBack Property
Returns a value that indicates whether the PageRequestManager object is processing a postback.
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To get or set property values for client API properties, you must call property accessor methods that are named with the get_ and set_ prefixes. For example, to get or set a value for a property such as cancel, you call the get_cancel or set_cancel methods. |
var status = Sys.WebForms.PageRequestManager.getInstance().get_isInAsyncPostBack();
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