JSFiddle - React, Tailwind, and code Playground

by Ratanak Serey

HTML

<!DOCTYPE html>
<html lang="pt-br">
    <head>
        <meta charset="UTF-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>SideBar Menu Curved Outside</title>
        <link rel="stylesheet" href="assets/style.css">
    </head>
    <body>
        <aside class="side-bar-wrap">
            <nav class="side-bar">
                <div class="logo-area">  
                    <img class="min" src="images/min-logo.png" alt="logo">
                    <img class="max" src="images/max-logo.png" alt="logo">
                </div>
                <ul>
                    <li class="active">
                        <a href="#">
                            <span class="icon">
                                <ion-icon name="home-outline"></ion-icon>
                            </span>
                            <span class="title">Home</span>
                        </a>
                    </li>
                    <li>
                        <a href="#">
                            <span class="icon">
                                <ion-icon name="newspaper-outline"></ion-icon>
                            </span>
                            <span class="title">Notícias</span>
                        </a>
                    </li>
                    <li>
                        <a href="#">
                            <span class="icon">
                                <ion-icon name="chatbox-ellipses-outline"></ion-icon>
                            </span>
                            <span class="title">Mensagens</span>
                        </a>
                    </li>
                    <li>
                        <a href="#">
                            <span class="icon">
                                <ion-icon name="headset-outline"></ion-icon>
                            </span>
                            <span class="title">Músicas</span>
       ...

CSS

:root {
    --color-primary: #1380b8;
    --color-secondary: #33ace3;
}
body {
    margin: 10px;
    background-color: rgb(51 172 227 / 20%);
    font-family: sans-serif;
}

/* SideBar */
aside.side-bar-wrap {
    --radius-size: 25px;
    height: 98vh;
    position: fixed;
    top: 1vh;
    left: 1vh;
    overflow-y: scroll;
    overflow-x: hidden;
    border-radius: var(--radius-size);
    padding-right: 2px;
}
aside.side-bar-wrap::-webkit-scrollbar {
    width: 10px;
}
aside.side-bar-wrap::-webkit-scrollbar-track {
    background-color: transparent;
}
aside.side-bar-wrap::-webkit-scrollbar-thumb {
    border-radius: var(--radius-size);
    background-color: var(--color-primary);
}

nav.side-bar {
    min-height: 100%;
    background-color: var(--color-primary);
    display: inline-block;
    border-left: var(--radius-size) solid var(--color-secondary);
    border-right: var(--radius-size) solid var(--color-primary);
    border-radius: var(--radius-size);
}
nav.side-bar .logo-area {
    --curve-size: calc(2 * var(--radius-size));
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
    min-height: var(--curve-size);
    background-color: var(--color-secondary);
    border-radius: 0 var(--radius-size) var(--radius-size) 0;
    box-shadow: var(--radius-size) 0 var(--color-secondary);
}
nav.side-bar .logo-area::after {
    content: '';
    width: var(--curve-size);
    height: var(--curve-size);
    background-color: var(--color-primary);
    border-radius: 50%;
    position: absolute;
    bottom: calc(-1 * var(--curve-size));
    left: 0;
    box-shadow:  calc(-1 * var(--curve-size) * 0.5)  calc(-1 * var(--curve-size) * 0.5) var(--color-secondary);
}
nav.side-bar .logo-area img {
    position: absolute;
    max-height: 75%;
    transition-duration: 1s;
}
aside.side-bar-wrap:hover nav.side-bar .logo-area img.min {
    max-height: 0;
    opacity: 0;
}
nav.side-bar .logo-area img.max {
    max-width: 0;
 ...

JavaScript

const initNavBar = () => {
    const menusEl = document.querySelectorAll('.side-bar ul li')
    menusEl.forEach(menu => menu.addEventListener('click', ()=> {
        const menuActiveEl = document.querySelector('.side-bar ul li.active')
        menuActiveEl.classList.remove('active')
        menu.classList.add('active')
    }))
}
initNavBar()