@angular/core

afterRender

function

Developer preview

Register a callback to be invoked each time the application finishes rendering, during the mixedReadWrite phase.

  
    function afterRender(  callback: VoidFunction,  options?: AfterRenderOptions): AfterRenderRef;

Register a callback to be invoked each time the application finishes rendering, during the mixedReadWrite phase.

You should prefer specifying an explicit phase for the callback instead, or you risk significant performance degradation.

Note that the callback will run

in the order it was registered
once per render
on browser platforms only
during the mixedReadWrite phase

Components are not guaranteed to be hydrated before the callback runs. You must use caution when directly reading or writing the DOM and layout.

Use afterRender to read or write the DOM after each render.

Example

          @Component({  selector: 'my-cmp',  template: `<span #content>{{ ... }}</span>`,})export class MyComponent {  @ViewChild('content') contentRef: ElementRef;  constructor() {    afterRender({      read: () => {        console.log('content height: ' + this.contentRef.nativeElement.scrollHeight);      }    });  }}

afterRender

AfterRenderRef

Register a callback to be invoked each time the application finishes rendering, during the mixedReadWrite phase.

You should prefer specifying an explicit phase for the callback instead, or you risk significant performance degradation.

Note that the callback will run

in the order it was registered
once per render
on browser platforms only
during the mixedReadWrite phase

Components are not guaranteed to be hydrated before the callback runs. You must use caution when directly reading or writing the DOM and layout.

@paramcallbackVoidFunction

A callback function to register

@paramoptionsAfterRenderOptions

Options to control the behavior of the callback

@returnsAfterRenderRef

Usage notes

Use afterRender to read or write the DOM after each render.

Example

          @Component({  selector: 'my-cmp',  template: `<span #content>{{ ... }}</span>`,})export class MyComponent {  @ViewChild('content') contentRef: ElementRef;  constructor() {    afterRender({      read: () => {        console.log('content height: ' + this.contentRef.nativeElement.scrollHeight);      }    });  }}