add new example, update content

docs/src/demos/Examples/Formatting/index.vue

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+<template>
+  <div>
+    <div v-if="editor">
+      <button @click="editor.chain().focus().bold().run()" :class="{ 'is-active': editor.isActive('bold') }">
+        bold
+      </button>
+      <button @click="editor.chain().focus().italic().run()" :class="{ 'is-active': editor.isActive('italic') }">
+        italic
+      </button>
+      <button @click="editor.chain().focus().heading({ level: 1 }).run()" :class="{ 'is-active': editor.isActive('heading', { level: 1 }) }">
+        h1
+      </button>
+      <button @click="editor.chain().focus().heading({ level: 2 }).run()" :class="{ 'is-active': editor.isActive('heading', { level: 2 }) }">
+        h2
+      </button>
+      <button @click="editor.chain().focus().heading({ level: 3 }).run()" :class="{ 'is-active': editor.isActive('heading', { level: 3 }) }">
+        h3
+      </button>
+      <button @click="editor.chain().focus().paragraph().run()" :class="{ 'is-active': editor.isActive('paragraph') }">
+        paragraph
+      </button>
+      <button @click="editor.chain().focus().textAlign('left').run()">
+        left
+      </button>
+      <button @click="editor.chain().focus().textAlign('center').run()">
+        center
+      </button>
+      <button @click="editor.chain().focus().textAlign('right').run()">
+        right
+      </button>
+    </div>
+    <editor-content :editor="editor" />
+  </div>
+</template>
+
+<script>
+import { Editor, EditorContent } from '@tiptap/vue-starter-kit'
+import Document from '@tiptap/extension-document'
+import Paragraph from '@tiptap/extension-paragraph'
+import Text from '@tiptap/extension-text'
+import Heading from '@tiptap/extension-heading'
+import Bold from '@tiptap/extension-bold'
+import Italic from '@tiptap/extension-italic'
+import TextAlign from '@tiptap/extension-text-align'
+import HardBreak from '@tiptap/extension-hard-break'
+
+export default {
+  components: {
+    EditorContent,
+  },
+
+  data() {
+    return {
+      editor: null,
+    }
+  },
+
+  mounted() {
+    this.editor = new Editor({
+      extensions: [
+        Document(),
+        Paragraph(),
+        Text(),
+        Heading({
+          level: [1, 2, 3],
+        }),
+        Bold(),
+        Italic(),
+        TextAlign(),
+        HardBreak(),
+      ],
+      content: `
+        <h2>Cyndi Lauper – Girls Just Want to Have Fun</h2>
+        <p>I come home in the morning light
+        My mother says, “When you gonna live your life right?”
+        Oh mother dear we’re not the fortunate ones
+        And girls, they wanna have fun
+        Oh girls just want to have fun</p>
+        <p>The phone rings in the middle of the night
+        My father yells, "What you gonna do with your life?"
+        Oh daddy dear, you know you’re still number one
+        But girls, they wanna have fun
+        Oh girls just want to have</p>
+        <p>That’s all they really want
+        Some fun
+        When the working day is done
+        Oh girls, they wanna have fun
+        Oh girls just wanna have fun (girls, they wanna, wanna have fun, girls wanna have)</p>
+      `,
+    })
+  },
+
+  beforeDestroy() {
+    this.editor.destroy()
+  },
+}
+</script>