JSFiddle - React, Tailwind, and code Playground

by Tony Realovich

HTML

<div class="menu-item">Пункт 1</div>

CSS

.menu-item {
    display: inline-block;
    background: #a1b965;
    padding: 10px 20px;
    position: relative;
}

.menu-item::after {
    content: ''; 
    position: absolute;
    right: -40px; top: 0px;
    border: 20px solid transparent;
    border-left: 20px solid #a1b965;
}