Vue 3 Composition API Watch
// directly watching a ref
const selected = ref(props.selected)
watch(selected, (selection, prevSelection) => {
/* ... */
})
// directly watching a ref
const selected = ref(props.selected)
watch(selected, (selection, prevSelection) => {
/* ... */
})
const count = ref(1)
const plusOne = computed(() => count.value + 1)
console.log(plusOne.value) // 2
plusOne.value++ // error
1var vm = new Vue({
el: '#example',
data: {
message: 'Hello'
},
computed: {
// a computed getter
reversedMessage: function () {
// `this` points to the vm instance
return this.message.split('').reverse().join('')
}
}
})