Invalid handler for event "": got undefined
1、错误截图： 错误原因： 绑定的方法不是放在methods:{}里。比如我把绑定的函数写在了computed:{}里就会报这个错。 解决方法1： 在@changeValue前面加一个英文的冒号 “ : ” ： 这是vue的自定义事件，可以多了解下； 解决方法2： 换为绑定事件：v-bind: ---> : 报错解决：
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