如何作为一个函数和方法调用一个函数?
以下是作为函数和方法调用函数的代码-
示例
<!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>Invoke a function as function and method</h1>
<div style="color: green;" class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>
Click on the above button to invoke function as function and method
</h3>
<script>
let resEle = document.querySelector(".result");
function add(a,b){
return a+b;
}
let obj = {
firstName:'Rohan',
lastName:'Sharma',
welcome(){
return 'Welcome '+this.firstName+' '+this.lastName;
}
}
document.querySelector(".Btn").addEventListener("click", () => {
resEle.innerHTML = 'Function invocation add(2,3) : ' + add(2,3) + '<br>';
resEle.innerHTML += 'Method invocation obj.welcome() : ' + obj.welcome() + '<br>';
});
</script>
</body>
</html>输出
以上代码将生成以下输出 −

单击“单击此处”按钮后 −

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