@vaadin/vaadin-lumo-styles/src/components/password-field.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_components_password-field {
  [part~='reveal-button']::before {
    content: var(--lumo-icons-eye);
  }

  :host([password-visible]) [part~='reveal-button']::before {
    content: var(--lumo-icons-eye-disabled);
  }

  /* Make it easy to hide the button across the whole app */
  [part~='reveal-button'] {
    position: relative;
    display: var(--lumo-password-field-reveal-button-display, block);
  }

  [part~='reveal-button'][hidden] {
    display: none !important;
  }
}