Where do visual force pages execute?
When a user views a Visualforce page, instances of the controller, extensions, and components associated with the page are created by the server. The order in which these elements are executed can affect how the page is displayed to the user.
How do I use Visualforce page in Salesforce?
Visualforce pages are webpages that belong to Salesforce. These webpages are created using a unique tag-based Mark-up language. It is similar to HTML but it’s primary use is to access, display and update the organization’s data. The page is accessed by using a URL similar to that of a traditional webserver page.
How to use Visualforce-call APEX method in JavaScript?
E.g. If this causes a problem, the other way is to execute some JavaScript when the page loads that invokes the action method and then renders the rest of the page. I’ve blogged that solution at:
How is the Order of execution of a Visualforce page determined?
To fully understand the order of execution of elements on a Visualforce page, you must first understand the page’s lifecycle –that is, how the page is created and destroyed during the course of a user session. The lifecycle of a page is determined not just by the content of the page, but also by how the page was requested.
When to use asynchronous callouts in Visualforce?
Asynchronous callouts that are made from a Visualforce page don’t count toward the Apex limit of 10 synchronous requests that last longer than five seconds. As a result, you can make more long-running callouts and you can integrate your Visualforce pages with complex back-end assets.
How does the action method work in Visualforce?
The action method creates a Continuation and returns it. After the request is sent to the service, the Visualforce request is suspended. The user must wait for the response to be returned before proceeding with using the page and invoking new actions.