一、JavaScript
1. toString会自动执行
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
</head>
<body></body>
</html>
<script>
function Test() {
Test.prototype.toString = () => {
console.log("我执行咯");
return "这是插入的数据";
};
}
const test = new Test();
document.body.innerText = test;
</script>
参考：
