Uncaught TypeError: Object(...) is not a function

[pieroliviermarquis]

I get this error when using it with Vuejs2:

vue-sidebar-menu.esm.js?2ab6:3 Uncaught TypeError: Object(...) is not a function
    at eval (vue-sidebar-menu.esm.js?2ab6:3)

The problem is with ref below:
var isCollapsed = ref(false);

[yaminncco]

v5.x only support vue3, if you want to use vue2 refer to the doc