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When to use a global variable in Visualforce?
Global Variables Use global variables to reference general information about the current user and your organization on a page. Global variables must be referenced using Visualforce expression syntax to be evaluated, for example, {!$User.FirstName}.
How is data retrieved from a Visualforce page?
Visualforce pages can display data retrieved from the database or web services, data that changes depending on who is logged on and viewing the page, and so on. This dynamic data is accessed in markup through the use of global variables, calculations, and properties made available by the page’s controller.
When to use global merge fields in Visualforce?
A global merge field type to use when referencing a Visualforce page. A global merge field type to use when referencing information about the current user’s custom permission access. Use permission merge fields to reference information about the user’s current access to any of your organization’s custom permissions.
How is a function used in a Visualforce expression?
Use a function in a Visualforce expression. Visualforce pages can display data retrieved from the database or web services, data that changes depending on who is logged on and viewing the page, and so on.
Can you use apex variable in sobject field?
Only and apex:outfield can be used with sObject fields. Note: does not support reassignment inside of an iteration component, such as or . The result of doing so, e.g., incrementing the as a counter, is unsupported and undefined.
When to call global event handler in jQuery?
Category: Global Ajax Event Handlers. These methods register handlers to be called when certain events, such as initialization or completion, take place for any Ajax request on the page. The global events are fired on each Ajax request if the global property in jQuery.ajaxSetup() is true, which it is by default.
When to use ajaxstart event in jQuery?
Whenever an Ajax request is about to be sent, jQuery checks whether there are any other outstanding Ajax requests. If none are in progress, jQuery triggers the ajaxStart event. Any and all handlers that have been registered with the .ajaxStart () method are executed at this time. To observe this method in action, set up a basic Ajax load request: