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Remember that handleClick is connected to our tag and its onclick attribute. The event, then, is someone clicking the button. Inside that event it has the notion of a source, the thing that generated the event, which is the button itself.
What does a controller do in Lightning component?
For our purposes, for Lightning Components, a controller is a resource in a component bundle that holds the action handlers for that component. And action handlers are just JavaScript functions with a particular function signature. We talk a lot about controllers in this unit, and we know that the component itself is a view.
Where does the model stand in Lightning components?
In traditional MVC, the model is a programmatic abstraction (usually a class) between the underlying data storage (usually a relational database) and the rest of the application. In Lightning Components, there’s no Apex class that directly stands in between @AuraEnabled controller methods and DML operations.
How to create dynamic aura ID in Lightning?
dynamic aura:id attribute for Lightning Components. Simple suggestion: make aura:id be able to be dynamic – such as parsing expressions – instead of having to be a litteral string. The result of the iteration loop would be five input fields with unique aura:id attributes equal to index1,index2, index3, index4, index5.
Where does the handleclick action in Salesforce take place?
The handleClick action uses event.getSource () to get the source component that fired this component event. In this case, the source component is the in the markup. The code then sets the value of the text component attribute to the value of the button’s label attribute.
This is an example with LWC lightning-datatable using button as a column and retriving the information with onrowaction, but, the same should be applied to Aura Component lightning:datatable onrowaction will return the action trigger in the row, it means, from An action field type, from a button or button-icon.
However, the “Flawed” button won’t work because arbitrary JavaScript, such as the alert () call, in the component is ignored. The framework has its own event system. DOM events are mapped to Lightning events, since HTML tags are mapped to Lightning components.