@vaadin/vaadin-lumo-styles/src/mixins/field-button.css

Lumo is a design system foundation for modern web applications, used by Vaadin components

/**
 * @license
 * Copyright (c) 2017 - 2026 Vaadin Ltd.
 * This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
 */
@media lumo_mixins_field-button {
  [part$='button'] {
    flex: none;
    width: 1em;
    height: 1em;
    line-height: 1;
    font-size: var(--lumo-icon-size-m);
    text-align: center;
    color: var(--lumo-contrast-60pct);
    transition: 0.2s color;
    cursor: var(--lumo-clickable-cursor);
  }

  [part$='button']:hover {
    color: var(--lumo-contrast-90pct);
  }

  :host([disabled]) [part$='button'],
  :host([readonly]) [part$='button'] {
    color: var(--lumo-contrast-20pct);
    cursor: default;
  }

  [part$='button']::before {
    font-family: 'lumo-icons';
    display: block;
  }

  [part~='clear-button'] {
    display: none;
    cursor: default;
  }

  [part~='clear-button']::before {
    content: '\2715';
  }

  :host([clear-button-visible][has-value]:not([disabled]):not([readonly])) [part~='clear-button'] {
    display: block;
  }
}