fix: only calculate a new preview element when the 'value' changes

Author: iOvergaard

src/packages/media/media/components/input-upload-field/input-upload-field.element.ts

@@ -74,6 +74,14 @@ export class UmbInputUploadFieldElement extends UmbLitElement {
 
 	constructor() {
 		super();
+	}
+
+	override updated(changedProperties: PropertyValueMap<any> | Map<PropertyKey, unknown>) {
+		super.updated(changedProperties);
+		if (changedProperties.has('value')) {
+			this.#setPreviewAlias();
+		}
+	}
 
 	async #getManifests() {
 		await new UmbExtensionsManifestInitializer(this, umbExtensionsRegistry, 'fileUploadPreview', null, (exts) => {
@@ -92,6 +100,10 @@ export class UmbInputUploadFieldElement extends UmbLitElement {
 		this._extensions = extensions?.map((extension) => `.${extension}`);
 	}
 
+	async #setPreviewAlias(): Promise<void> {
+		this._previewAlias = await this.#getPreviewElementAlias();
+	}
+
 	async #getPreviewElementAlias() {
 		if (!this.value.src) return;
 		const manifests = await this.#getManifests();