1.Vue- Watch(监听props/data)

• 监听基本使用 监听props/data

 <script>
    export default {
        props: {
            sonPlay: {},
        },
        watch: {
            sonPlay(newV,oldV) {
                console.log(newV,oldV)
            }
        },
    }
</script>

• deep 深度监听，可监听到对象、数组的变化

 <script>
    export default {
        props: {
            sonPlay: {},
        },
        watch: {
            sonPlay:{   //深度监听，可监听到对象、数组的变化
                //使用handler
                handler (newV, oldV) {
                    console.log(newV,oldV)
                },
                deep:true
        },
    }
</script>