Added closest(), clone(), before(), after(), isVisible(), and boundingClientRect()

src/Component.ts

@@ -77,6 +77,18 @@ export class Component<T extends HTMLElement = HTMLElement> extends ElementCompo
         return [...this.node.querySelectorAll<T>(selectors)].map(e => new Component<T>(e));
     }
 
+    /**
+     * Traverse the component and its parents (heading toward the document root) until it finds a component that matches
+     * the specified {@link https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_selectors CSS selector}.
+     * @param selectors
+     * @typeParam T Component element type
+     */
+    public closest<T extends HTMLElement = HTMLElement>(selectors: string): Component<T> | null {
+        const element = this.node.closest<T>(selectors);
+        if (element == null) return null;
+        return new Component<T>(element);
+    }
+
     /**
      * Set style property
      * @param name Property name
@@ -113,6 +125,10 @@ export class Component<T extends HTMLElement = HTMLElement> extends ElementCompo
         return this;
     }
 
+    public override clone(deep = true) {
+        return new Component<T>(this.node.cloneNode(deep) as T);
+    }
+
     public override on<K extends keyof HTMLElementEventMap>(type: K, listener: (ev: HTMLElementEventMap[K], component: this) => any): typeof this;
     public override on<K extends keyof HTMLElementEventMap>(type: K, listener: (ev: HTMLElementEventMap[K], component: this) => any, options: AddEventListenerOptions): typeof this;
     public override on<K extends keyof HTMLElementEventMap>(type: K, listener: (ev: HTMLElementEventMap[K], component: this) => any, useCapture: boolean): typeof this;

src/DocumentComponent.ts

@@ -44,4 +44,10 @@ export class DocumentComponent extends NodeComponent<DocumentFragment> {
             component.slot(idPrefix + index, doc.node);
         return doc;
     }
+
+    public override clone(deep = true) {
+        const doc = new DocumentComponent();
+        doc.node.append(this.node.cloneNode(deep));
+        return doc;
+    }
 }

src/ElementComponent.ts

@@ -58,6 +58,25 @@ export abstract class ElementComponent<T extends Element> extends NodeComponent<
         return this;
     }
 
+    /**
+     * Insert components in the children list of this `ElementComponent`’s parent, just before this `ElementComponent`.
+     * @param components Components to insert
+     */
+    public before(...components: NodeComponent<any>[]) {
+        this.node.before(...components.map(c => c.node));
+        return this;
+    }
+
+    /**
+     * Insert components in the children list of this `ElementComponent`’s parent, just after this `ElementComponent`.
+     * @param components Components to insert
+     */
+    public after(...components: NodeComponent<any>[]) {
+        this.node.after(...components.map(c => c.node));
+        return this;
+    }
+
+
     /**
      * Add classes
      */
@@ -162,6 +181,23 @@ export abstract class ElementComponent<T extends Element> extends NodeComponent<
         return this.node[name];
     }
 
+    /**
+     * Check whether the component is visible.
+     * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/Element/checkVisibility Element: checkVisibility() - MDN}
+     */
+    public isVisible() {
+        return this.node.checkVisibility();
+    }
+
+    /**
+     * Get a {@link !DOMRect} object providing information about the size of a component and its position relative to
+     * the {@link https://developer.mozilla.org/en-US/docs/Glossary/Viewport viewport}.
+     * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect Element: getBoundingClientRect() - MDN}
+     */
+    public boundingClientRect() {
+        return this.node.getBoundingClientRect();
+    }
+
     /**
      * Remove the element
      */

src/NodeComponent.ts

@@ -58,6 +58,14 @@ export abstract class NodeComponent<T extends Node> {
 		return this;
 	}
 
+	/**
+	 * Clone this component. Event listeners are not cloned.
+	 * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/Node/cloneNode Node: cloneNode() - MDN}
+	 * @param [deep] Whether to clone the whole subtree.
+	 * @returns A duplicate of this component.
+	 */
+	public abstract clone(deep?: boolean): NodeComponent<T>;
+
 	/**
 	 * Add event listener
 	 * @param type A case-sensitive string representing the event type to listen for.

src/SvgComponent.ts

@@ -30,4 +30,8 @@ export class SvgComponent extends ElementComponent<SVGSVGElement> {
     public static from(svg: string) {
         return new SvgComponent(document.createRange().createContextualFragment(svg).children[0] as SVGSVGElement);
     }
+
+    public override clone(deep = true) {
+        return new SvgComponent(this.node.cloneNode(deep) as SVGSVGElement);
+    }
 }

src/TextComponent.ts

@@ -37,6 +37,13 @@ export class TextComponent extends NodeComponent<Text> {
 		throw new DOMException(`NodeComponent.append: Cannot add children to a ${this.constructor.name}`);
 	}
 
+	/**
+	 * Clone this text component.
+	 */
+	public override clone() {
+		return new TextComponent(this.node.cloneNode() as Text);
+	}
+
 	/**
 	 * Get the text content
 	 */