angular-10-notes/Angular_notes_ep_15.txt at main · arctutorials/angular-10-notes · GitHub

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Episode #15
Communication between various Angular components

Contacts -> Module

    contact-listing -> parent component
        contact-grid -> child component
        contact-tools -> child component
            download-pdf -> sub-child component
            download-excel

Leads -> Module

    leads-listing -> parent component


Components are hierarchial
Parent-child relationship

p1
    child1
        sub-child1
    child2

p2
    p2-child1

1. Communications between the related components
    parent component -> child components
        @Input
    parent components <- child components
        @Output

    Leads Module
        leads-listing
            leads-grid
            leads-tools
                download-excel
                download-pdf

2. communication between totally unrealted components
    Component1 -> Services <-   Component2

    services
        is a common reusable piece of functionality shared between different components