vue事件带默认参数，怎么传递其他参数

Question

子组件emit出来的事件带有1到2个参数，在父组件中怎么传递其他参数，且保留子组件的参数，记得有2中方式，求教

子组件
this.$emit('submit', arg1, arg2)

父组件
<some-cmp @submit='doSomething'>确定</some-cmp>

doSomething后面怎么传参，除了接收arg1、arg2，再添加一个arg3

Answer 1

再加一种写法，<some-cmp @submit='doSomething(...$event, '我是第三参数')'>确定</some-cmp>

在template中可用$event访问参数。

Answer 2

@submit='(arg1, arg2) => doSomething(arg1,arg2, arg3)'

Answer 3

<some-cmp @submit="(arg1, arg2) => { doSomething(arg1, arg2, arg3, arg4) }">确定</some-cmp>

Answer 4

<some-cmp @submit="(...args) => {
  const otherArgs = [/* ... */];
  doSomthing(...args, ...otherArgs);
}">确定</some-cmp>