fixes #1795 (#1822)

docs/pages/resources/changelog.md

@@ -23,6 +23,7 @@ New versions of Shoelace are released as-needed and generally occur when a criti
 - Fixed a bug in `<sl-input>` and `<sl-textarea>` that made it work differently from `<input>` and `<textarea>` when using defaults [#1746]
 - Fixed a bug in `<sl-select>` that prevented it from closing when tabbing to another select inside a shadow root [#1763]
 - Fixed a bug in `<sl-spinner>` that caused the animation to appear strange in certain circumstances [#1787]
+- Fixed a bug that caused empty `<sl-radio-group>` elements to log an error in the console [#1795]
 - Fixed a bug that caused modal scroll locking to conflict with the `scrollbar-gutter` property [#1805]
 - Fixed a bug in `<sl-option>` that caused slotted content to show up when calling `getTextLabel()` [#1730]
 - Improved the accessibility of `<sl-tooltip>` so they persist when hovering over the tooltip and dismiss when pressing [[Esc]] [#1734]

src/components/radio-group/radio-group.component.ts

@@ -218,7 +218,7 @@ export default class SlRadioGroup extends ShoelaceElement implements ShoelaceFor
 
     this.hasButtonGroup = radios.some(radio => radio.tagName.toLowerCase() === 'sl-radio-button');
 
-    if (!radios.some(radio => radio.checked)) {
+    if (radios.length > 0 && !radios.some(radio => radio.checked)) {
       if (this.hasButtonGroup) {
         const buttonRadio = radios[0].shadowRoot?.querySelector('button');