How to create a local Aura component ID?

How to create a local Aura component ID?

A local ID is an ID that is only scoped to the component. A local ID is often unique but it’s not required to be unique. Create a local ID by using the aura:id attribute. For example: aura:id doesn’t support expressions.

How to merge a child component in aura?

For instance, create an application event that you fire in your “changeObjectTxt” method, and then implement a handler in the simplechildcomponent that calls its own controller method. I don’t think merge fields are supported in the aura:id attribute.

How to find a component by its ID?

Retrieve a component by its ID in JavaScript code. Use aura:id to add a local ID of button1 to the lightning:button component. You can find the component by calling cmp.find (“button1”), where cmp is a reference to the component containing the button. The find () function has one parameter, which is the local ID of a component within the markup.

How to find a button in Lightning aura?

Find the button component by calling cmp.find (“button1”) in your client-side controller, where cmp is a reference to the component containing the button. find () returns different types depending on the result. If the local ID is unique, find () returns the component.

How is component creation in Lightning aura asynchronous?

Component creation is asynchronous if it requires a server trip. Follow good asynchronous practices, such as only using the new component in the callback. The callback has three parameters. cmp —The component that was created.

How many components can be created in one request?

A single call to createComponent () or createComponents () can result in many components being created. The call creates the requested component and all its child components. In addition to performance considerations, server-side component creation has a limit of 10,000 components that can be created in a single request.

How to avoid server trip with aura component?

You can avoid this server trip by adding an tag for the component you’re creating in the markup of the component that calls $A.createComponent (). The tag ensures that the component definition is always available on the client.

What do global IDs mean in Lightning aura?

Every component has a unique globalId, which is the generated runtime-unique ID of the component instance. A global ID (1) is not guaranteed to be the same beyond the lifetime of a component, so it should never be relied on. A global ID can be useful to differentiate between multiple instances of a component or for debugging purposes.

How to get the ID of an event?

$ (event.target).id is undefined $ (event.target).id gives the id attribute. event.target.id also gives the id attribute. this.id gives the id attribute.