How to prevent editing first n characters in input type text in Vue?

Question

Vue.js

I have input. It is necessary that when FOCUS always has a non-removable text "XXXXXX" and after this text the user can enter his own text. When input is not on focus, a regular placeholder with text was shown

Answer 1

can be done simply. general idea :

<span class="textbox"> 
        Это неизменяемый  текст
        <input  v-model="message" type="text" name="url" />
    </span>