fixes #457

docs/resources/changelog.md

@@ -6,6 +6,10 @@ Components with the <sl-badge type="warning" pill>Experimental</sl-badge> badge
 
 _During the beta period, these restrictions may be relaxed in the event of a mission-critical bug._ 🐛
 
+## Next
+
+- Fixed a bug in `sl-select` where no selection with `multiple` resulted in an incorrect value [#457](https://github.com/shoelace-style/shoelace/issues/457)
+
 ## 2.0.0-beta.43
 
 - Added `?` to optional arguments in methods tables

src/components/select/select.ts

@@ -159,6 +159,11 @@ export default class SlSelect extends LitElement {
   }
 
   getValueAsArray() {
+    // Single selects use '' as an empty selection value, so convert this to [] for an empty multi select
+    if (this.multiple && this.value === '') {
+      return [];
+    }
+
     return Array.isArray(this.value) ? this.value : [this.value];
   }