setup(props, context) {
const { ref, watch, reactive, toRefs, watchEffect } = Vue
const nameObj = reactive({name: ‘dell’, englishName: ‘hi’})
const {name, englishName} = toRefs(nameObj)
watch([name, englishName], ([currentName, currentEnglishName], [prevName, prevEnglishName]) => {
console.log(‘watch’, currentName, prevName, ‘—’, currentEnglishName, prevEnglishName)
}, {
immediate: true
})
const stop = watchEffect(() => {
console.log(name.value)
console.log(englishName.value)
setTimeout(() => {
stop()
}, 5000);
})
return { name, englishName }
},

老师，name 和 englishName 的解构赋值放在前面， watch里面可以直接侦听 name 和 englishName变量， 为啥 watchEffect 里面需要侦听 name.value 和 englishName.value 才可以呢