TS中报错说$el在element类型中不存在怎么办

Question

Property '$el' does not exist on type 'Element | Element[] | Vue | Vue[]'.
Property '$el' does not exist on type 'Element'.

相关代码

let elem = this.$refs.nav.$el;
new PerfectScrollbar(elem);

请问怎么给$refs加类型?

Answer 1

let elem = (this.$refs.nav as Vue).$el

Answer 2

let elem = this.$refs.nav['$el'];