Two way binding in Angular ColorPicker component

22 Jul 2021 / 2 minutes to read

ColorPicker component supports two-way property binding.

The steps to perform two-way binding.

Create ColorPicker component and binds the value property as like the below code snippet.

<input ejs-colorpicker type="color" class="form-control" id="colorpicker" required [(value)]="value" name="colorpicker" />

Create text box and bind the value using ngModel.

<input type="text" id="name" name="name" class="form-control" [(ngModel)]="value" />

And name the same variable name in both color picker and text box. Which will help to view the two-way binding i.e. changing value in color picker will change the textbox value and vice versa.
Initialize the value of the variable in component file, while will be bound to color picker and text box initially. The values will be changed synchronously while changing any one (color picker or text-box) value.

Source

Preview

app.component.ts

app.module.ts

main.ts

template.html

import { Component, Input } from '@angular/core';
import { FormGroup } from '@angular/forms';
import { Browser } from '@syncfusion/ej2-base';

@Component({
selector: 'app-root',
templateUrl: 'app/template.html',
styleUrls:['index.css']
})

export class AppComponent {
private cValue: string = "#1de4d7";

get value(): string {
    if (Browser.info.name === 'msie' && this.cValue.length > 7) {
        return this.cValue.substring(0, this.cValue.length - 2);
    } else {
        return this.cValue;
    }
}

@Input('value')
set value(value: string) {
    this.cValue = value;
}
}

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ColorPickerModule } from '@syncfusion/ej2-angular-inputs';
import { FormsModule } from '@angular/forms';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        ColorPickerModule,
        FormsModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

<div class="container">
	<form #colorPickerForm="ngForm">
		<div class="form-group">
			<label for="color">The selected color value is:</label>
			<br/>
			<div class="wrap">
				<input type="text" id="color" name="color" class="form-control" spellcheck="false" [(ngModel)]="value" required>
				<input ejs-colorpicker type="color" class="form-control" id="colorpicker" required [(value)]="value" name="colorpicker" />
			</div>
		</div>
	</form>
</div>

By default, the selected color value returns 8 digit hex code in value property. Some browser like IE won’t support the 8 digit hex code. In such case, you can use getter setter method to change the value to supported format as like the above sample.