Reapply "Merge branch 'main' into 65-add-focus"

This reverts commit 6b03d63.

Author: kai-gitt

src/Component.ts

@@ -89,6 +89,15 @@ export class Component<T extends HTMLElement = HTMLElement> extends ElementCompo
         return new Component<T>(element);
     }
 
+    /**
+     * Test whether the element would be selected by the specified
+     * {@link https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_selectors CSS selector}, or group of CSS selectors.
+     * @param selectors
+     */
+    public is(selectors: string): boolean {
+        return this.node.matches(selectors);
+    }
+
     /**
      * Puts the element into
      * {@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/focus Focus}