Front-end development - Vue event parameter $event

$event is a special variable of the event object, which provides us with more available parameters to achieve complex functions in some scenarios. Native Events: Behaves the same as the default event object in Native Events.

<template>
    <div>
        <input type="text" @input="inputHandler( hello , $event)" />
    </div>
</template>
export default {
    methods: {
        inputHandler(msg, e) {
            console.log(e.target.value)
        }
    }
}

Custom Events: Represented in custom events as capturing values ​​thrown from child components.

export default {
    methods: {
        customEvent() {
            this.$emit( custom-event ,  some value )
        }
    }
}
<template>
    <div>
        <my-item v-for="(item, index) in list" @custom-event="customEvent(index, $event)">
            </my-list>
    </div>
</template>
export default {
    methods: {
        customEvent(index, e) {
            console.log(e) //  some value
        }
    }
}

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Origin blog.csdn.net/helloyangkl/article/details/129078056