Checkbox Component

checkbox.scss

checkbox {
    box-sizing: border-box;
    display: block;
    margin-bottom: 16px;
    white-space: nowrap;
    cursor: pointer;
    outline: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    position: relative;
    min-width: 20px;
    min-height: 20px;
    margin-left: 0;
    margin-right: 16px;

    &[disabled] {
        color: rgba(0, 0, 0, .38);
        
        .checkbox-icon {
            border-color: rgba(0, 0, 0, .38);
        }
    
    }

    .checkbox-icon {
        border-color: transparent;
    }

    &:not(.checkbox-checked) .checkbox-icon {
        border-color: rgba(0,0,0,0.54);
    }
}

.checkbox {
    
    &-container {
        position: absolute;
        box-sizing: border-box;
        display: inline-block;
        width: 20px;
        height: 20px;
        left: 0;
        right: auto;
    }

    &-icon {
        box-sizing: border-box;
        -webkit-transition: .24s;
        transition: .24s;
        position: absolute;
        top: 0;
        left: 0;
        width: 20px;
        height: 20px;
        border-width: 2px;
        border-style: solid;
        border-radius: 2px;
    }

    &-label {
        box-sizing: border-box;
        position: relative;
        display: inline-block;
        user-select: none;
        margin-left: 30px;
        margin-right: 0;
    }

    &-checked {

        & .checkbox-icon {
            background-color: rgba(255,82,82,0.87);

            &:after {
                border-color: rgba(255,255,255,0.87);
                box-sizing: border-box;
                transform: rotate(45deg);
                position: absolute;
                left: 4.66667px;
                top: .22222px;
                display: table;
                width: 6.66667px;
                height: 13.33333px;
                border-width: 2px;
                border-style: solid;
                border-top: 0;
                border-left: 0;
                content: "";
            }

        }
    }

}

checkbox.ts

import * as angular from 'angular';

/** @ngInject **/
class CheckboxControler implements ng.IComponentController {

    private ngModelCtrl: ng.INgModelController;
    
    constructor(
        private $element: ng.IRootElementService,
        private $timeout: ng.ITimeoutService
    ){}

    $onInit() {
        this.$element.on('click', (e) => {
            if (this.$element.attr('disabled')) {
                e.stopImmediatePropagation();
                return;
            }
            this.toggle(!this.ngModelCtrl.$viewValue);
        });
    }

    private toggle(selected: boolean) {
        if (selected) {
            this.$element.addClass('checkbox-checked');
            this.validate();
        } else {
            this.ngModelCtrl.$setViewValue(selected);
            this.$element.removeClass('checkbox-checked');
        }
    }

    private async validate() {
        let result = await this.fakePromise();
        
        if (!result) {
            alert('Ahh Haa!');
            this.$element.removeClass('checkbox-checked');
        } else {
            this.ngModelCtrl.$setViewValue(result);
        }
    }

    protected fakePromise(): Promise<boolean> {
        return new Promise( resolve => {
            let result = !! Math.floor(Math.random() * 2);
            console.log('result is', result);
            this.$timeout(() => resolve(result), 1000);
        });
    }

}

let checkbox: ng.IComponentOptions = {
    template: `
        <div class="checkbox-container">
            <div class="checkbox-icon"></div>
            <div class="checkbox-label">
                <span ng-transclude></span>
            </div>
        </div>
    `,
    controller: CheckboxControler,
    transclude: true,
    require: {
        'ngModelCtrl': 'ngModel'
    }
}

export default angular.module('checkbox', [])
    .component('checkbox', checkbox)
    .name;

index.html

<checkbox ng-model="$ctrl.checked">
    Checkbox1: {{ $ctrl.checked }}
</checkbox>

<checkbox ng-model="$ctrl.checked" ng-disabled="!$ctrl.checked">
    Checkbox2: {{ $ctrl.checked }}
</checkbox>