Vue笔记
生命周期
beforeCreate:
vue实例初始化后执行
数据被观察前
created:
在data observation, computed properties, methods, watch/event callbacks. 之后
beforeMount:
~
mounted:
不保证所有的组件都被挂载完毕,如果要保证所有组件挂载完毕,使用 vm.$nextTick
mounted() { this.$nextTick(function () { // Code that will run only after the // entire view has been rendered }) }
beforeUpdate:
watch中
deep作用
数组或者对象改变值之后,vue是不知道的,所以需要 将deep设置为 true,方能监测到。
immediate:
页面首次加载立即执行
watch: {
colours: { // This will let Vue know to look inside the array deep: true, // We have to move our method to a handler field handler() console.log('The list of colours has changed!'); } } }