const mixins = {  created () {    console.log('mixins created')  }}const mixins2 = {  created () {    console.log('mixins2 created')  }}const extend = {  created () {    console.log('extends created')  }}export default {  mixins: [mixins, mixins2],  extends: extend,  created () {    console.log('组件 created')  }}

控制台输出：

extends只能继承一个

mixins可以多个