JSFiddle - React, Tailwind, and code Playground

by Vadim

HTML

<button class="button" aria-label="Кнопка">Кнопка</button>
<br>
<button class="button" aria-label="Кнопка большая">Кнопка большая</button>
<br>

<button class="button" aria-label="Кнопка большая с переносом текста">Кнопка большая <br/> с переносом текста</button>

CSS

body {
  background-color: black;
  height: 100vh;
  width: 100vw;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.button {
  background-image: linear-gradient(to right, red, orange); /* Цвет бордера в данном случае */
  color: white;
  font-size: 16px;
  padding: 10px 20px;
  border: none;
  clip-path: polygon(0px 0px, calc(100% - 10px) 0px, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  position: relative;
}

.button::after {
  content: attr(aria-label);
  width: calc(100% - 2px);
  height: calc(100% - 2px);
  position: absolute;
  top: 1px;
  left: 1px;
  background-color: black; /* Цвет заливки в данном случае */
  display: flex;
  align-items: center;
  justify-content: center;
  clip-path: inherit;
  transition: all 0.2s ease-in-out;
  z-index: 2;
}

.button:hover {
  background-image: none;
}

.button:hover::after {
   background-color: transparent;
   color: white;
}

.button:hover::before {
   transform: scaleX(1);
}

.button::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(to right, red, orange);
  z-index: 1;
  transform: scaleX(0);
  transition: all 0.3s ease-in-out;
  transform-origin: left center;
  clip-path: inherit;
}