前端 html js 自定义事件监听和发送消息

// 监听自定义事件
const dom = document.createElement('div');
dom.id = 'self_dom';
dom.class = 'self_dom';
dom.style.display = 'none';
document.body.appendChild(dom);
dom.addEventListener('self_evt', (e) => {
 console.log(e.detail.mynamne)
        });

//触发事件 
let obj = document.getElementById("patrol_360_syhzlcx_dom")
var event = new CustomEvent("self_evt", {"detail":{"myname":"lyz"}});
obj.dispatchEvent(event);