Bar.vue

<template>
	<header class="header position-fixed">
		<div class="position-relative">
			<button
				class="toggle btn border-secondary position-absolute p-1 ml-4"
				@click="toggleMenu">
				<span></span>
			</button>
			<NavigationBreadcrumb :breadcrumb="breadcrumb" />
		</div>
		<NavigationMenuSidebar @toggleMenu="toggleMenu" :menus="menus" />
		<div class="bg_overlay position-fixed" @click="toggleMenu"></div>
	</header>
</template>

<script>
export default {
	data() {
		return {
			isOpen: false
		}
	},
	props: {
		breadcrumb: Array,
		menus: Array
	},
	methods: {
		toggleMenu() {
			document.querySelector(".app").classList.toggle("open")
			this.isOpen = !this.isOpen
			localStorage.setItem("menu-open", this.isOpen)
		}
	},
	mounted() {
		this.isOpen = localStorage.getItem("menu-open") == "true"
		if (this.isOpen) {
			document.querySelector(".app").classList.add("open")
		}
	}
}
</script>

<style lang="scss">
$btn-width: 50px;

.header {
	--menu-width: 0px;
	width: 100%;
	z-index: 100;
	background: var(--background-color-primary);
	transition: width 0.5s ease-in-out;

	.open & {
		--menu-width: 320px;
	}

	@media (min-width: 1200px) {
		width: calc(99vw - var(--menu-width));
	}
}

nav.breadcrumb-wrapper {
	min-height: 80px;
	margin: 8px 15px;
	padding: 1rem 1rem 1rem 4.5rem;
	display: flex;
	flex-direction: column;
	gap: 1rem;
	background: var(--background-color-secondary);

	a {
		color: var(--text-primary-color);
	}

	.breadcrumb-item.active {
		opacity: 0.7;
	}

	@media (min-width: 768px) {
		flex-direction: row;
		justify-content: space-between;
		align-items: center;
	}
}

%hamburger-line {
	display: block;
	height: 4px;
	width: 0.8 * $btn-width;
	background: var(--text-primary-color);
	content: "";
	position: absolute;
	transition-property: transform;
	border-radius: 4px;
}

.toggle {
	height: $btn-width;
	width: $btn-width;
	line-height: $btn-width;
	top: 1rem;

	span {
		@extend %hamburger-line;
		top: 50%;
		transform: translateY(-50%);
		transition-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
		transition-duration: 75ms;

		.open & {
			transform: rotate(45deg);
			display: block;
			margin-top: -2px;
		}

		&::before {
			transition: top 75ms ease 0.12s, opacity 75ms ease;
			@extend %hamburger-line;
			top: -10px;

			.open & {
				opacity: 0;
			}
		}

		&::after {
			transition: bottom 75ms ease 0.12s,
				transform 75ms cubic-bezier(0.55, 0.055, 0.675, 0.19);
			@extend %hamburger-line;
			bottom: -10px;

			.open & {
				top: 0;
				transform: rotate(-90deg);
			}
		}
	}
}

.menu {
	background: var(--background-color-primary);
	width: var(--menu-size);
	top: 0;
	z-index: 1200;
	height: 100%;
	padding: 1.1rem 0.5rem;
	overflow-y: scroll;
	scrollbar-color: #6969dd #e0e0e0;
	scrollbar-width: thin;
	transition: left 0.5s ease-in-out;
	left: -400px;

	h1 {
		color: var(--text-primary-color);
	}

	.open & {
		left: 0;
	}

	.close {
		--size: 50px;
		width: var(--size);
		height: var(--size);
		top: 0.8rem;
		right: 0;
		font-size: 2rem;
	}

	h2 {
		cursor: default;
	}
}

.bg_overlay {
	top: 0;
	left: 0;
	right: 0;
	height: 120vh;
	z-index: 1100;
	visibility: hidden;
	opacity: 0;
	transition: all 0.5s ease;
	background-color: rgba(34, 41, 47, 0.5);

	.open & {
		opacity: 1;
		visibility: visible;
	}
}

.logo {
	max-width: 75px;
}

@media (min-width: 1200px) {
	.open {
		&.app {
			margin-left: var(--menu-size);
		}

		.menu {
			left: 0;
		}

		.bg_overlay {
			visibility: hidden;
			opacity: 0;
		}
	}
}
</style>