vue+typescript Property 'toggleRowSelection' does not exist on type 'Vue'报错解决办法

看一下写法，会报错

TIM截图20210518170858.png

private toggleSelection(rows: any) {
        rows.forEach((row: any) => {
        this.$refs.articleTable.toggleRowSelection(row);
        })
    }

修改为以下

private toggleSelection(rows: any) {
        const form = this.$refs.articleTable as ElTable
        rows.forEach((row: any) => {
            form.toggleRowSelection(row);
        })
    }