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

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

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+context('/api/nodes/hard-break', () => {
+  before(() => {
+    cy.visit('/api/nodes/hard-break')
+  })
+
+  beforeEach(() => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p>Example Text</p>')
+    })
+  })
+
+  it('should parse hard breaks correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p>Example<br>Text</p>')
+      expect(editor.getHTML()).to.eq('<p>Example<br>Text</p>')
+    })
+  })
+
+  it('should parse hard breaks with self-closing tag correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p>Example<br />Text</p>')
+      expect(editor.getHTML()).to.eq('<p>Example<br>Text</p>')
+    })
+  })
+
+  it('the button should add a line break', () => {
+    cy.get('.ProseMirror br')
+      .should('not.exist')
+
+    cy.get('.demo__preview button:first')
+      .click()
+
+    cy.get('.ProseMirror br')
+      .should('exist')
+  })
+
+  it.skip('the default keyboard shortcut should add a line break', () => {
+    cy.get('.ProseMirror br')
+      .should('not.exist')
+
+    cy.get('.ProseMirror')
+      .trigger('keydown', { shiftKey: true, key: 'Enter' })
+
+    cy.get('.ProseMirror br')
+      .should('exist')
+  })
+
+  it('the alternative keyboard shortcut should add a line break', () => {
+    cy.get('.ProseMirror br')
+      .should('not.exist')
+
+    cy.get('.ProseMirror')
+      .trigger('keydown', { modKey: true, key: 'Enter' })
+
+    cy.get('.ProseMirror br')
+      .should('exist')
+  })
+})

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

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+<template>
+  <div v-if="editor">
+    <button @click="editor.chain().focus().hardBreak().run()">
+      hardBreak
+    </button>
+
+    <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'
+import HardBreak from '@tiptap/extension-hard-break'
+
+export default {
+  components: {
+    EditorContent,
+  },
+
+  data() {
+    return {
+      editor: null,
+    }
+  },
+
+  mounted() {
+    this.editor = new Editor({
+      extensions: [
+        Document(),
+        Paragraph(),
+        Text(),
+        HardBreak(),
+      ],
+      content: `
+        <p>
+          This<br>
+          is<br>
+          a<br>
+          single<br>
+          paragraph<br>
+          with<br>
+          line<br>
+          breaks.
+        </p>
+      `,
+    })
+  },
+
+  beforeDestroy() {
+    this.editor.destroy()
+  },
+}
+</script>