fix build

docs/src/TiptapDemo.js

@@ -1,36 +1,38 @@
 import iframeResize from 'iframe-resizer/js/iframeResizer'
 
-class TiptapDemo extends HTMLElement {
-  url = 'https://embed.tiptap.dev'
+if (typeof window === 'object' && !window.process) {
+  class TiptapDemo extends HTMLElement {
+    url = 'https://embed.tiptap.dev'
 
-  connectedCallback() {
-    const wrapper = document.createElement('div')
-    const iframe = document.createElement('iframe')
-    const shadow = this.attachShadow({ mode: 'open' })
-    const name = this.getAttribute('name')
-    const inline = this.getAttribute('inline') === ''
-    const hideSource = this.getAttribute('hideSource') === ''
+    connectedCallback() {
+      const wrapper = document.createElement('div')
+      const iframe = document.createElement('iframe')
+      const shadow = this.attachShadow({ mode: 'open' })
+      const name = this.getAttribute('name')
+      const inline = this.getAttribute('inline') === ''
+      const hideSource = this.getAttribute('hideSource') === ''
 
-    iframe.src = `${this.url}/preview/${name}?inline=${inline}&hideSource=${hideSource}`
-    iframe.width = '100%'
-    iframe.height = '0'
-    iframe.frameBorder = '0'
+      iframe.src = `${this.url}/preview/${name}?inline=${inline}&hideSource=${hideSource}`
+      iframe.width = '100%'
+      iframe.height = '0'
+      iframe.frameBorder = '0'
 
-    shadow.appendChild(wrapper)
+      shadow.appendChild(wrapper)
 
-    iframe.addEventListener('load', () => {
-      iframeResize({}, iframe)
-    }, { once: true })
+      iframe.addEventListener('load', () => {
+        iframeResize({}, iframe)
+      }, { once: true })
 
-    const observer = new IntersectionObserver(([entry]) => {
-      if (entry.isIntersecting) {
-        observer.unobserve(wrapper)
-        wrapper.appendChild(iframe)
-      }
-    })
+      const observer = new IntersectionObserver(([entry]) => {
+        if (entry.isIntersecting) {
+          observer.unobserve(wrapper)
+          wrapper.appendChild(iframe)
+        }
+      })
 
-    observer.observe(wrapper)
+      observer.observe(wrapper)
+    }
   }
-}
 
-window.customElements.define('tiptap-demo', TiptapDemo)
+  window.customElements.define('tiptap-demo', TiptapDemo)
+}