Set body class when variable is active in vue?

Question

Vue.js

How to refer to body in vue?
If the showMobileMenu variable is set to true, you need to add a class to the body. How - I understand where - no.
:class="showMobileMenu ? '_lock' :''"

Answer 1

watch: {
  переменная: {
    immediate: true,
    handler(val) {
      document.body.classList.toggle('класс', val);
    },
  },
},