兼容2.0版本生命周期 ``` beforeCreate -> use setup() created -> use setup() beforeMount -> onBeforeMount mounted -> onMounted beforeUpdate -> onBeforeUpdate updated -> onUpdated beforeDestroy -> onBeforeUnmount destroyed -> onUnmounted activated -> onActivated deactivated -> onDeactivated errorCaptured -> onErrorCaptured // added 調試用的 debug生命周期 onRenderTracked onRenderTriggered // 記錄重新reRender的時候哪些值發生了變化 ``` setup函數只會執行一次 ``` setup() { console.log('set up'); onMounted(() => { console.log('onMouted'); }) onUpdated(() => { console.log('updated'); }) onRenderTriggered((event) => { console.log(event); }) } ```