docs: add a word break experiment

docs/src/demos/Experiments/WordBreak/index.vue

@@ -0,0 +1,69 @@
+<template>
+  <div v-if="editor">
+    <button @click="editor.chain().focus().setWordBreak().run()" :class="{ 'is-active': editor.isActive('wordBreak') }">
+      wbr
+    </button>
+
+    <editor-content :editor="editor" />
+
+    <h2>HTML</h2>
+    {{ editor.getHTML() }}
+  </div>
+</template>
+
+<script>
+import { Editor, EditorContent } from '@tiptap/vue-2'
+import { defaultExtensions } from '@tiptap/starter-kit'
+import { WordBreak } from './word-break'
+
+export default {
+  components: {
+    EditorContent,
+  },
+
+  data() {
+    return {
+      editor: null,
+    }
+  },
+
+  mounted() {
+    this.editor = new Editor({
+      extensions: [
+        ...defaultExtensions(),
+        WordBreak,
+      ],
+      content: `
+        <p>super<wbr>longword</p>
+      `,
+    })
+  },
+
+  beforeDestroy() {
+    this.editor.destroy()
+  },
+}
+</script>
+
+<style lang="scss" scoped>
+::v-deep {
+  .ProseMirror {
+    > * + * {
+      margin-top: 0.75em;
+    }
+  }
+
+  .word-break {
+    display: inline-block;
+    height: 1em;
+    margin: 0 0.1em;
+    line-height: 1em;
+    border: 1px dashed #868e96;
+    color: #868e96;
+
+    &::before {
+      content: '-';
+    }
+  }
+}
+</style>