Handle no color support in Angular Color picker component

26 Feb 20269 minutes to read

The ColorPicker component supports a no color option, allowing users to clear the selection. When the no color tile is clicked from the palette, the color value is cleared, indicating that no color has been selected.

Default no color

To achieve this, set noColor property as true.

In the following sample, the first tile of the color palette represents the no color tile. By clicking the no color tile you can achieve the above functionalities.

app.component.ts

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



import { Component, OnInit } from '@angular/core';
import { ColorPickerEventArgs } from '@syncfusion/ej2-angular-inputs';

@Component({
imports: [
        FormsModule,ColorPickerModule
    ],


standalone: true,
    selector: 'app-root',
    template: `<div class="e-section-control">
                <div id="preview"></div>
                <h4>Choose Color</h4>
                <ejs-input ejs-colorpicker type="color" id="element" mode="Palette" value="#ba68c8" [showButtons]="false" (change)="onChange($event)" [modeSwitcher]="false" [noColor]="true" />
                </div>`
})

export class AppComponent implements OnInit {
    public preview?: HTMLElement;

    // Triggers while color value changes.
    public onChange(args: ColorPickerEventArgs): void {
        this.preview!.style.backgroundColor = args.currentValue.hex;
        if (args.currentValue.hex) {
            this.preview!.textContent = args.currentValue.hex;
        } else {
            this.preview!.textContent = "No color"
        }
    }

    ngOnInit(): void {
        this.preview = document.getElementById('preview') as HTMLElement;
        this.preview.style.backgroundColor = "#ba68c8";
        this.preview.textContent = "#ba68c8";
    }
}

main.ts

import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

If the noColor property is enabled, make sure to disable the modeswitcher property.

Custom no color

The following sample shows a color palette with a custom no color option.

app.component.ts

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { FormsModule } from '@angular/forms'
import { ColorPickerModule } from '@syncfusion/ej2-angular-inputs'
import { SplitButtonModule } from '@syncfusion/ej2-angular-splitbuttons'



import { Component, ViewChild, OnInit } from '@angular/core';
import { ColorPickerComponent } from '@syncfusion/ej2-angular-inputs';
import { SplitButtonComponent } from '@syncfusion/ej2-angular-splitbuttons';

@Component({
imports: [
        FormsModule,ColorPickerModule,SplitButtonModule
    ],


standalone: true,
    selector: 'app-root',
    template: `<div class="e-section-control">
                <ul id="target" tabindex="0">
                    <li class="e-item e-palette-item">
                        <ejs-input ejs-colorpicker #palette type="color" value="#f44336" id="element" mode="Palette" [inline]="true" (change)="onChange($event)" (beforeTileRender)="beforeRender($event)" [modeSwitcher]="false" [showButtons]="false" [columns]="column" [presetColors]="customColors" />
                    </li>
                    <li class="e-item" tabindex="-1" (click)="noColorClicked()">
                        <span class="e-menu-icon e-nocolor"></span>
                        No color
                    </li>
                </ul>
                <div>
                    <div id="preview"></div>
                    <h4>Select Color</h4>
                    <ejs-splitbutton #splitbtn iconCss="e-cp-icons e-picker-icon" target="#target"></ejs-splitbutton>
                </div>
                </div>`
})

export class AppComponent implements OnInit {
    @ViewChild("palette")
    public palette?: ColorPickerComponent;
    @ViewChild("splitbtn")
    public splitBtn?: SplitButtonComponent;

    public customColors: { [key: string]: string[] } = {
        'custom': ['#f44336', '#e91e63', '#9c27b0', '#673ab7', '#2196f3', '#03a9f4', '#00bcd4',
            '#009688', '#8bc34a', '#cddc39', '#ffeb3b', '#ffc107']
    };

    public column: number = 4;

    public preview?: HTMLElement;

    public beforeRender(args: any): void {
        args.element.classList.add('e-custom-tile');
    }

    public noColorClicked(): void {
        //sets color picker value property to null
        this.palette?.setProperties({ 'value': "" }, true);
        (document.querySelector('.e-split-btn .e-picker-icon') as HTMLElement).style.borderBottomColor = "transparent";
        this.preview!.textContent = "No color"
        this.preview!.style.backgroundColor = "transparent";
    }

    // Triggers while color value changes.
    public onChange(args: any): void {
        (document.querySelector(".e-split-btn .e-picker-icon") as HTMLElement).style.borderBottomColor = args.currentValue.hex;
        this.preview!.style.backgroundColor = args.currentValue.hex;
        this.preview!.textContent = args.currentValue.hex;
        if (this.splitBtn?.element.getAttribute("aria-expanded")) {
            this.splitBtn.toggle();
            this.splitBtn.element.focus();
        }
    }

    ngOnInit(): void {
        this.preview = document.getElementById('preview') as HTMLElement;
        this.preview.style.backgroundColor = "#f44336";
        this.preview.textContent = "#f44336";
    }
}

main.ts

import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));