父组件调用子组件的方法 ref

onMounted(() => {
activeName.value = route.query.pos || ‘first’
})
// 切换标题
const firstRef = ref(null)
const secondRef = ref(null)
const handleClick = (tab, event) => {
console.log(tab, event, ‘切换标题’)
if (tab.index == 0) {
firstRef.value.gettab()
} else {
secondRef.value.gettab()
}

}

子组件
把被调用的方法暴露
defineExpose({
gettab
})