How can I call function from directive after component's rendering?
11,701
Solution 1
You can retrieve Directive from Component's template with ViewChild
like this:
@Directive({
...,
selector: '[directive]',
})
export class DirectiveClass {
method() {}
}
In your component:
import { Component, ViewChild } from '@angular/core'
import { DirectiveClass } from './path-to-directive'
@Component({
...,
template: '<node directive></node>'
})
export class ComponentClass {
@ViewChild(DirectiveClass) directive = null
ngAfterContentInit() {
// How can i call functionFromDirective()?
this.directive.method()
}
}
Solution 2
Calling the method from within a component is not a good idea. Using a directive helps in a modular design, but when you call the method, you get a dependency from the component to the directive.
Instead, the directive should implement the AfterViewInit interface:
@Directive({
...,
selector: '[directive]',
})
export class DirectiveClass implements AfterViewInit {
ngAfterViewInit(): void {}
}
This way, your component doesn't have to know anything about the directive.
Author by
John Doe
Updated on June 06, 2022Comments
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John Doe almost 2 years
How can I call function from directive after component's rendering?
I have component:
export class Component { ngAfterContentInit() { // How can i call functionFromDirective()? } }
And I want call this function:
export class Directive { functionFromDirective() { //something hapenns }
How can i do this?
-
John Doe over 7 yearsThanks a lot! You really helps me.
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Akber Iqbal almost 6 yearsin the sequence of events, the Directive's AfterViewInit ran earlier than my Component's ngAfterContentChecked... but it depends upon a person's requirement