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vue3_watchEffect

wachtEffect()

  • watch的套路是：既要指明监听的属性，也要指明监听的回调
  • watchEffect的套路是： 不用指明监听哪个属性，监听的回调中用到哪个属性，那就监视哪个属性。
const todoId = ref(1)
const data = ref(null)

watch(todoId, async () => {
  const response = await fetch(
    `https://jsonplaceholder.typicode.com/todos/${todoId.value}`
  )
  data.value = await response.json()
}, { immediate: true })
漫步人生路Less than 1 minutevuewatchEffect