Vue 监听元素前后变化值实例

我就废话不多说了，大家还是直接看代码吧~ export default { data() { return { item: '' } }, watch: { item(now, before){ let remove = before.filter(x => now.indexOf(x) == -1); let add = now.filter(x => before.indexOf(x) == -1); /* 显示字符串或数组元素的增加和减少 */ console.log(add, remove); } } } 补充知识：Vuejs+Element监听-