contenteditable-vue-1

App.vue

<template>
  <card v-model="content" />
</template>

<script>
  import Card from '...'
  
  export default {
    components: { Card },
    data() {
      return {
        content: 'hello world',
      }
    },
  }
</script>

Card.vue

<template>
  <div contenteditable="true" @input="update" v-text="modelValue"></div>
</template>
<script>
export default {
  props: {
    modelValue: {
      type: String,
      default: '',
    },
  },
  emits: ['update:modelValue'],
  methods: {
    update(e) {
      this.$emit('update:modelValue', e.target.textContent)
    },
  },
}
</script>