Tah*_*aza 7 javascript function
I am working on a javascript code where functions are defined in three different ways.
funtion f1(){}
and second
var vaiable = f1(){}
and third
window.f1 = function(){}
I have read about the first two here but don't know about the last one.
Will there be a problem if I change the third one to the second one?
What are the pros and cons of third type?
Why it is used particularly?
// this is function declaration in JavaScript
// @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function
function myFunction (/* args */) { /* body */ }
// this is function expression
// @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/function
const/var/let myFunction = function myFunction(/* args */) { /* body */ }
// this is basically (unnamed) function expression, defining property `f1` on global object `window`
window.f1 = function (/* args */) { /* body */ }
如果将第三种方法更改为第二种方法，它将绑定到某个范围（块，它将被放置的位置）。而第三个始终是全局的（可以从任何地方使用）。
请注意，您还可以使用第一种和第二种方法在全局范围内声明函数。例如：
<head>
<script>function myFunction() {/* body */}</script>
</head>