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Below I will share with you an article that when Vue uses $emit, the parent component cannot monitor the event instance of the child component. It has a good reference value and I hope it will be helpful to everyone.
When vue uses $emit, the reason why the parent component cannot monitor the events of the child component is that the event name passed in by $emit can only be lowercase and cannot be named using uppercase camel case rules
<p id="counter-event-example"> <p>{{ total }}</p> <button-counter v-on:ee="incrementTotal"></button-counter> <button-counter v-on:eEvent="incrementTotal"></button-counter> <child ref="cmpSelect" v-on:ee="incrementTotal" option-api-url="/api/admin/cms/cmsCategory/getOptions.do"></child> </p> <script> Vue.component('button-counter', { template: '<button v-on:click="increment">{{ counter }}</button>', data: function () { return { counter: 0 } }, methods: { increment: function () { this.counter += 1 this.$emit('ee', this.counter);//有效 this.$emit('eEvent', this.counter);//无效,不能使用大写的驼峰规则命名 } }, }) new Vue({ el: '#counter-event-example', data: { total: '点击下面的按钮' }, methods: { incrementTotal: function (b) { this.total = b; } } }) </script>
The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.
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