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 调试用的 debug生命周期 onRenderTracked onRenderTriggered // 记录重新reRender的时候哪些值发生了变化 ``` setup函数只会执行一次 ``` setup() { console.log('set up'); onMounted(() => { console.log('onMouted'); }) onUpdated(() => { console.log('updated'); }) onRenderTriggered((event) => { console.log(event); }) } ```