woocommerce/plugins/woocommerce-admin/client/profile-wizard/header.js

/**
 * External dependencies
 */
import { Component } from '@wordpress/element';
import { filter } from 'lodash';
import { Stepper } from '@woocommerce/components';
import { updateQueryString } from '@woocommerce/navigation';

export default class ProfileWizardHeader extends Component {
	renderStepper() {
		const { currentStep, steps } = this.props;
		const visibleSteps = filter( steps, ( step ) => !! step.label );
		const currentStepIndex = visibleSteps.findIndex(
			( step ) => step.key === currentStep
		);

		visibleSteps.map( ( step, index ) => {
			const previousStep = visibleSteps[ index - 1 ];

			if ( index < currentStepIndex ) {
				step.isComplete = true;
			}

			if ( ! previousStep || previousStep.isComplete ) {
				step.onClick = ( key ) => updateQueryString( { step: key } );
			}
			return step;
		} );

		return <Stepper steps={ visibleSteps } currentStep={ currentStep } />;
	}

	render() {
		const currentStep = this.props.steps.find(
			( s ) => s.key === this.props.currentStep
		);

		if ( ! currentStep || ! currentStep.label ) {
			return null;
		}

		return (
			<div className="woocommerce-profile-wizard__header">
				{ this.renderStepper() }
			</div>
		);
	}
}