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Creating JavaScript constructor using the “new” operator?
Following is the code for creating a JavaScript constructor using the ‘new’ operator −
Example
<!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;
}
</style>
</head>
<body>
<h1>JavaScript constructor using new</h1>
<div style="color: green;" class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to create JavaScript constructor using new operator</h3>
<script>
let resEle = document.querySelector(".result");
function Human(firstName,lastName,age){
this.firstName = firstName;
this.lastName = lastName;
this.age = age;
}
let obj = new Human('Rohan','Sharma',22);
document.querySelector(".Btn").addEventListener("click", () => {
for(i in obj){
resEle.innerHTML += 'Key = ' + i + ' : Value = ' + obj[i] + '<br>'
}
});
</script>
</body>
</html>Output
The above code will produce the following output −
On clicking the ‘CLICK HERE’ button −
Updated on: 16-Jul-2020
79 Views
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