Vue @click shorthand gives error

[leafleaf90]

Name of the lexer
Vue

Code sample

 <button
        class="join-item btn"
        @click="currentPage = currentPage - 1"
        :disabled="currentPage <= 1"
      >
        «
      </button>

Additional context
v-on:click shorthand @click produces error, even though it is OK or even preferred ("We can use the v-on directive, which we typically shorten to the @ symbol" from Vue docs) to use the shorthand.

(I'm also not sure why the <= operator gives an error)