vue props two strings can not code example

Example 1: vue prop string or number

props: {
        users_count: {
            type: [Number, String],
            required: true
        }
    },

Example 2: vue passing props

<!-- Dynamically assign the value of a variable -->
<blog-post v-bind:title="post.title"></blog-post>

<!-- Dynamically assign the value of a complex expression -->
<blog-post
  v-bind:title="post.title + ' by ' + post.author.name"
></blog-post>