shoelace/src/components/radio/radio.ts

import { html } from 'lit';
import { customElement } from 'lit/decorators.js';
import { classMap } from 'lit/directives/class-map.js';
import { ifDefined } from 'lit/directives/if-defined.js';
import { live } from 'lit/directives/live.js';
import RadioBase from '../../internal/radio';
import styles from './radio.styles';

/**
 * @since 2.0
 * @status stable
 *
 * @slot - The radio's label.
 *
 * @event sl-blur - Emitted when the control loses focus.
 * @event sl-change - Emitted when the control's checked state changes.
 * @event sl-focus - Emitted when the control gains focus.
 *
 * @csspart base - The component's internal wrapper.
 * @csspart control - The radio control.
 * @csspart checked-icon - The container the wraps the checked icon.
 * @csspart label - The radio label.
 */
@customElement('sl-radio')
export default class SlRadio extends RadioBase {
  static styles = styles;

  render() {
    return html`
      <label
        part="base"
        class=${classMap({
          radio: true,
          'radio--checked': this.checked,
          'radio--disabled': this.disabled,
          'radio--focused': this.hasFocus
        })}
      >
        <input
          class="radio__input"
          type="radio"
          name=${ifDefined(this.name)}
          value=${ifDefined(this.value)}
          .checked=${live(this.checked)}
          .disabled=${this.disabled}
          @click=${this.handleClick}
          @blur=${this.handleBlur}
          @focus=${this.handleFocus}
        />
        <span part="control" class="radio__control">
          <span part="checked-icon" class="radio__icon">
            <svg viewBox="0 0 16 16">
              <g stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
                <g fill="currentColor">
                  <circle cx="8" cy="8" r="3.42857143"></circle>
                </g>
              </g>
            </svg>
          </span>
        </span>

        <span part="label" class="radio__label">
          <slot></slot>
        </span>
      </label>
    `;
  }
}

declare global {
  interface HTMLElementTagNameMap {
    'sl-radio': SlRadio;
  }
}