SOURCE

const body = document.body;
const app = new CallApp({
    fallback: "https://google.com",
    domPayload: body,
    evokeSuccess: function() {
        console.log("evokeSuccess")
    },
    evokeFailure: function() {
        console.log("evokeFailure")
    }
})
document.getElementById("ua").innerText = window.navigator.userAgent;
setTimeout(function() {
    app.start()
}, 3000)

<div id="ua"></div>
<div>请复制以上文本，三秒后执行逻辑</div>