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This is the default type of api function; the example above is a sync api function definition. Sync functions will call the client and wait for the api function to execute/return before continuing. Sync api functions can have a return value.

Client side code of the sync api function can return either directly the intended return value or a Promise that in the end resolves with the intended return value. Server will wait for any client returned Promise to resolve before resuming server-side code execution.

In case of component sync functions, if the form is not present in browser's DOM then sync calls will force-load it in a hidden div just in order to execute the sync function on the component.

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They are useful when for example you want to send progress information to the service client-side while executing a long-running-operation server-side.

Async-now function calls will not send other pending async calls to client nor update the client's state with other pending changes (model updates of components/services/etc.).

Just add "async-now": true (another optional parameter (that by default is false)) to the call definition.

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Allow server side calls when component or parent form is not visible

By default, serve server side call calls coming from client are ignored if the component or the parent form is not visible (anymore), such as, calling . For example, a call to a server side function when switching to a new form, to do some cleanup, might get blocked. To still allow these calls,
you should add "allowaccess" : "visible" to the function definition in the .spec file.

Server Side Scripting

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