tiptap/docs/src/demos/Extensions/Italic/index.vue

<template>
  <div v-if="editor">
    <button @click="editor.chain().focus().italic().run()" :class="{ 'is-active': editor.isActive('italic') }">
      italic
    </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 Italic from '@tiptap/extension-italic'

export default {
  components: {
    EditorContent,
  },

  data() {
    return {
      editor: null,
    }
  },

  mounted() {
    this.editor = new Editor({
      extensions: [
        Document(),
        Paragraph(),
        Text(),
        Italic(),
      ],
      content: `
        <p>This isn’t italic.</p>
        <p><em>This is italic.</em></p>
        <p><i>And this.</i></p>
        <p style="font-style: italic">This as well.</p>
      `,
    })
  },

  beforeDestroy() {
    this.editor.destroy()
  },
}
</script>