fix: externalise icons

js/icons/book-open-icon.js

@@ -0,0 +1,64 @@
+/**
+ * Book Open Icon Web Component
+ * An open book icon
+ */
+class BookOpenIcon extends HTMLElement {
+  static get observedAttributes() {
+    return ["size", "color", "stroke-width"];
+  }
+
+  constructor() {
+    super();
+    this.attachShadow({ mode: "open" });
+  }
+
+  connectedCallback() {
+    this.render();
+  }
+
+  attributeChangedCallback() {
+    this.render();
+  }
+
+  get size() {
+    return this.getAttribute("size") || "48";
+  }
+
+  get color() {
+    return this.getAttribute("color") || "currentColor";
+  }
+
+  get strokeWidth() {
+    return this.getAttribute("stroke-width") || "1";
+  }
+
+  render() {
+    this.shadowRoot.innerHTML = `
+      <style>
+        :host {
+          display: inline-flex;
+          align-items: center;
+          justify-content: center;
+        }
+        svg {
+          display: block;
+        }
+      </style>
+      <svg
+        xmlns="http://www.w3.org/2000/svg"
+        width="${this.size}"
+        height="${this.size}"
+        viewBox="0 0 24 24"
+        fill="none"
+        stroke="${this.color}"
+        stroke-width="${this.strokeWidth}"
+        stroke-linecap="round"
+        stroke-linejoin="round"
+      >
+        <path d="M12 6.042A8.967 8.967 0 0 0 6 3.75c-1.052 0-2.062.18-3 .512v14.25A8.987 8.987 0 0 1 6 18c2.305 0 4.408.867 6 2.292m0-14.25a8.966 8.966 0 0 1 6-2.292c1.052 0 2.062.18 3 .512v14.25A8.987 8.987 0 0 0 18 18a8.967 8.967 0 0 0-6 2.292m0-14.25v14.25"></path>
+      </svg>
+    `;
+  }
+}
+
+customElements.define("book-open-icon", BookOpenIcon);