Solve the problem that the @message event of the web-view component does not trigger

 1. This is the web-view page

<template>
	<view>
		<!-- 跳转外部网页,这个xxxx地址是h5网页的地址-->
		<web-view  src="xxxxx" @message="messaged"></web-view>
	</view>
</template>
<script>
    export default {
		methods: {
			// 从webview获取参数
			messaged(event) {
				console.log(event);
			},
		}
	}
</script>
<style></style>

2. This is an h5 page. Don’t forget to import uni’s SDK. I didn’t write uni.navigateBack(), thinking that after executing uni.postMessage(), the @message event of web-view will be received, but it won’t. Add @message receives parameters normally after uni.navigateBack()

    <script type="text/javascript" src="https://js.cdn.aliyun.dcloud.net.cn/dev/uni-app/uni.webview.0.1.52.js"></script>

    <script type="text/javascript">
            document.addEventListener('UniAppJSBridgeReady', function () {
                uni.postMessage({
                    data: {
                        action: '123'
                    }
                });
                uni.navigateBack()
            });
    </script>

-- It is written in the document that the @message event of the web-view will be triggered after executing uni.postMessage(), but it still needs uni.navigateBack() to trigger, or it may be that I misunderstood this sentence in the document. This little thing is really giving me a headache--