Use $A.getCallback () to wrap any code that modifies a component outside the normal rerendering lifecycle, such as in a setTimeout () call. The $A.getCallback () call ensures that the framework rerenders the modified component and processes any enqueued actions.
What does the $a getcallback () call do?
The $A.getCallback () call ensures that the framework rerenders the modified component and processes any enqueued actions. So I made a simple component that displays "Hello World" and a button that fakes an async call using promises and setTimeout.
How do I use getcallback in react?
Use $A.getCallback () to wrap any code that modifies a component outside the normal rerendering lifecycle, such as in a setTimeout () call. The $A.getCallback () call ensures that the framework rerenders the modified component and processes any enqueued actions.
How do I wrap my head around $a getcallback?
I've been trying to wrap my head around $A.getCallback but the only documentation I could find was not very helpful. Use $A.getCallback () to wrap any code that modifies a component outside the normal rerendering lifecycle, such as in a setTimeout () call.
What is a enqueueAction action?
enqueueAction(action) adds the server-side controller action to the queue of actions to be executed. All actions that are enqueued will run at the end of the event loop.
What is the use of a enqueueAction action in lightning?
enqueueAction(action) sends the request the server. More precisely, it adds the call to the queue of asynchronous server calls. That queue is an optimization feature of Lightning.
What is $a and a Util in lightning?
$A is how you gain access to the underlying Aura framework, such as enqueuing actions, getting application events, managing the Aura rendering life cycle, and various utility methods.
What is doInit function in lightning?
The doInit action sets an attribute value, but it could do something more interesting, such as firing an event. If a component is contained in another component or app, the inner component is initialized first.
What is a getCallback?
getCallback() to wrap any code that modifies a component outside the normal rerendering lifecycle, such as in a setTimeout() call. The $A. getCallback() call ensures that the framework rerenders the modified component and processes any enqueued actions.
Why we use $a in lightning component?
The $A namespace is the entry point for using the framework in JavaScript code. It allows you to interact with the framework.
What is $a in Salesforce?
$A is how you gain access to the underlying Aura framework, such as enqueuing actions, getting application events, managing the Aura rendering life cycle, and various utility methods.
How do I transfer data from lightning to iframe?
You can use postMessage() to communicate between your Lightning Component and the content of the iframe.
What are Aura components in Salesforce?
Aura components are the self-contained and reusable units of an app. They represent a reusable section of the UI, and can range in granularity from a single line of text to an entire app. Event-driven programming is used in many languages and frameworks, such as JavaScript and Java Swing.
What is an init handler?
This registers an init event handler for the component. init is a predefined event sent to every component. After the component is initialized, the doInit action is called in the component's controller.
What is action setCallback in lightning?
setCallback() Sets the callback function that is executed after an Apex action returns.
What is LWC bundle in salesforce?
To create a Lightning Web Component, we first need to create a Folder that bundles our component's files. The folder and its files must have the same name, including capitalization and underscores. The folder and its files must follow these naming rules.