ต่อไปนี้เป็นรหัสสำหรับแก้ไขต้นแบบวัตถุในตัวใน JavaScript -
ตัวอย่าง
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
body {
font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
.result {
font-size: 20px;
font-weight: 500;
color: blueviolet;
}
</style>
</head>
<body>
<h1>Modify built-in object prototypes</h1>
<div class="result"></div>
<br />
<button class="Btn">Click Here</button>
<h3>Click on the above button to call the alert method</h3>
<script>
let resEle = document.querySelector(".result");
let BtnEle = document.querySelector(".Btn");
window.alert = function (msg) {
resEle.innerHTML = "Custom Alert function has been triggered<br>";
resEle.innerHTML += "Alert Message = " + msg;
};
BtnEle.addEventListener("click", () => {
alert("Hello World");
});
</script>
</body>
</html> ผลลัพธ์
เมื่อคลิกปุ่ม 'คลิกที่นี่' -
