How vuejs "form view" works which is used in frappe hr pwa app

Frappe HR
1 
<template>
	<ion-page>
		<ion-content :fullscreen="true">
			<FormView
				v-if="formFields.data"
				doctype="Leave Application"
				v-model="leaveApplication"
				:isSubmittable="true"
				:fields="formFields.data"
				:id="props.id"
				:showAttachmentView="true"
				@validateForm="validateForm"
			/>
		</ion-content>
	</ion-page>
</template>

can someone tell me how this form view works, i want to use this for a custom doctype and want to display only some fields