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| <template> <div> <h2>Student组件</h2><br/> <span>increment: {{sum}}</span><br/> <button @click="btnIncrement">increment</button><br/> <hr /> </div> </template> <script>
import {onBeforeMount, onBeforeUnmount, onBeforeUpdate, onMounted, onUnmounted, onUpdated, ref} from 'vue'; export default { name: 'Student', setup(props, context) { let sum = ref(0) let btnIncrement = function () { sum.value++; } onBeforeMount(() => { console.log('---onBeforeMount---'); }) onMounted(() => { console.log('---onMounted---'); }) onBeforeUpdate(() => { console.log('---onBeforeUpdate---'); }) onUpdated(() => { console.log('---onUpdated---'); }) onBeforeUnmount(() => { console.log('---onBeforeUnmount---'); }) onUnmounted(()=>{ console.log('---onUnmounted---'); }) return { sum,btnIncrement } } } </script> <style> </style>
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