move everything around, add more content and a first test for images

docs/src/demos/Nodes/Document/index.spec.js

@@ -0,0 +1,26 @@
+context('/api/nodes/document', () => {
+  before(() => {
+    cy.visit('/api/nodes/document')
+  })
+
+  beforeEach(() => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p></p>')
+    })
+  })
+
+  it('should return the document in as json', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      const json = editor.getJSON()
+
+      expect(json).to.deep.equal({
+        type: 'document',
+        content: [
+          {
+            type: 'paragraph',
+          },
+        ],
+      })
+    })
+  })
+})

docs/src/demos/Nodes/Document/index.vue

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+<template>
+  <div v-if="editor">
+    <editor-content :editor="editor" />
+  </div>
+</template>
+
+<script>
+import { Editor } from '@tiptap/core'
+import { EditorContent } from '@tiptap/vue'
+import Document from '@tiptap/extension-document'
+import Paragraph from '@tiptap/extension-paragraph'
+import Text from '@tiptap/extension-text'
+
+export default {
+  components: {
+    EditorContent,
+  },
+
+  data() {
+    return {
+      editor: null,
+    }
+  },
+
+  mounted() {
+    this.editor = new Editor({
+      extensions: [
+        Document(),
+        Paragraph(),
+        Text(),
+      ],
+      content: `
+        <p>The Document extension is required. Though, you can write your own implementation, e. g. to give it custom name.</p>
+      `,
+    })
+  },
+
+  beforeDestroy() {
+    this.editor.destroy()
+  },
+}
+</script>