update

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@lightweight-sdk/web-component",
-  "version": "0.0.0",
+  "version": "0.0.2",
   "description": "A lightweight library to build web components easily",
   "scripts": {
     "build": "tsc -b",

src/component.tools.ts

@@ -58,11 +58,13 @@ export function CustomComponent<T extends ConstructorFunction<AbstractComponent>
             }
 
             // Apply any specified CSS classes to the component root element
+            if (p.cssClasses) {
                 this.classList.add(...p.cssClasses);
+            }
 
             // Process and link properties specified in __linkedProperties to their DOM elements
             for (const requested of this.__linkedProperties ?? []) {
-                const elt = findRefElement(requested.ref);
+                const elt = findRefElement(requested.ref, this);
                 if (elt == null) {
                     throw new Error(`ref ${requested.ref} not found`);
                 }

src/dom.tools.ts

@@ -21,5 +21,6 @@ export function findRefElement(ref: string, parent?: HTMLElement): HTMLElement |
  * @returns the template as a string
  */
 export function parseModuleToHtml(mod: any): string {
+    if (mod == null) return "";
     return "default" in mod ? mod.default as string : "";
 }