How to pass values to directive in angular

If you want to send data to directive then you should try like this:

This is my custom directive, and I am going to share two value from component or HTML to the directive.

test.directive.ts:

import { Directive, ElementRef, Input, OnInit } from '@angular/core';@Directive({    selector: '[input-box]'})export class TestDirectives implements OnInit {    @Input() name: string;    @Input() value: string;    constructor(private elementRef: ElementRef) {    }    ngOnInit() {        console.log("input-box keys  : ", this.name, this.value);    }}

and now your directive has been created and you will have add this directive into your app.module.ts like below:

app.module.ts:

import { NgModule } from '@angular/core';import { AppComponent } from './app.component';import { TestDirectives } from '../directives/test.directive';@NgModule({  declarations: [    AppComponent,    TestDirectives  ],  imports: [],  providers: [],  bootstrap: [AppComponent]})export class AppModule { }

You will have to use your directive in your html and send data to the directive like in below code.

I am sending name and value to the test.directive.ts .

<div input-box [name]="'lightcyan'" [value]="'CYAN'"></div>

or

<div input-box [name]="componentObject.name" [value]="componentObject.value"></div>

Now see the console or use data in the directive accordingly.

This is an Example how you can pass value to a Directive

Directive

    import {Directive, Input, HostListener} from '@angular/core';    @Directive({      selector: '[appConfirm]'    })    export class ConfirmDirective {      //we can also add the attribute directive liek this [appconfirm] if the input in the directive has same name as appConfirm like      //@Input() appConfirm:string; and then in component button we can use the directive like      //<button type="button" [appConfirm] = "Rahul">Click to Send to Directive</button>      @Input() value:string;      @HostListener('click',['$event'])      confirm(){          const confirmed = window.confirm("Are you Sure ?");          if(confirmed){            window.alert("This is Value ["+this.value+"] Passed by the Component to the Directive")          }      }  constructor() { }}

ComponentTemplate.html

<button type="button" appConfirm value = "Rahul">Click to Send to Directive</button>

For more info look this repo https://github.com/rahulrsingh09/AngularConcepts/tree/master/src/app/directives

Use @input and pass value from parent component, where this component was used like [imgval]="val"