add placeholder extension

examples/Components/Routes/Placeholder/index.vue

@@ -0,0 +1,36 @@
+<template>
+	<div>
+		<editor class="editor" :extensions="extensions">
+			<div class="editor__content" slot="content" slot-scope="props"></div>
+		</editor>
+	</div>
+</template>
+
+<script>
+import { Editor } from 'tiptap'
+import { PlaceholderExtension } from 'tiptap-extensions'
+
+export default {
+	components: {
+		Editor,
+	},
+	data() {
+		return {
+			extensions: [
+				new PlaceholderExtension(),
+			],
+		}
+	},
+}
+</script>
+
+<style lang="scss">
+.editor p.is-empty:first-child::before {
+	content: 'Start typing…';
+	float: left;
+	color: #aaa;
+	pointer-events: none;
+	height: 0;
+	font-style: italic;
+}
+</style>