vue3警告Extraneous non-emits event listeners (XXX) were passed to component but could not be automatic

vue3 警告Extraneous non-emits event listeners (selectMeth) were passed to component but could not be automatically inherited because component renders fragment or text root nodes. If the listener is intended to be a component custom event listener only, declare it using the “emits” option.

之所以出现这个警告，是因为在子组件向父组件发送自定义事件的时候，没有使用“emits”选项声明它。

这里使用两种方式改正 emits 选项。

第一种，setup之外：

export default {//提前声明你要使用的自定义事件emits: ['modelValue'],......mounted(){this.$emit('modelValue','hello world')},setup(){......}
}

第二种，setup之内：

<script setup>//提前声明你要使用的自定义事件const emit = defineEmits(['modelValue'])emit('modelValue', 'hello world')
</script>

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vue3警告Extraneous non-emits event listeners (XXX) were passed to component but could not be automatic

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