小程序

<web-view src="{{url}}" bindmessage="onMessage"></web-view>
 onMessage(e) {  console.log('收到 WebView 消息1111:', e.detail.data);  }                       

web

function loadWxSdk() {
    return new Promise((resolve, reject) => {
        if (window.wx) {
            resolve(window.wx);
            return;
        }
        const script = document.createElement('script');
        script.src = 'https://res.wx.qq.com/open/js/jweixin-1.6.0.js';
        script.onload = () => resolve(window.wx);
        script.onerror = reject;
        document.head.appendChild(script);
    });
}
loadWxSdk().then(wx => { 
    if (window.wx && window.wx.miniProgram && window.wx.miniProgram.postMessage) {
    window.wx.miniProgram.postMessage({
            data: {
                XXXXXX
            }
        });
    } 
})

开发者工具控制台打印

invokeAppService postMessage {xxxxxxxx} 18

输出内容是我要传的，但是不知道在哪打印，而我写的打印没有执行