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Javascript function
function is an Object in javascript
Javascript function has properties as well as methods.
Normal function Declaration
function functionName(argumentparemeters){ }
Anonymous Function
var pp (variable which will save the return value from function)=function(){
alert("Hi this is anonymous function");
}
Constructor
function Memeber(a,b){
this.name=a;
this.skill=b;
}
var t=new Member("Pavan","Servicenow");
var g=new Member("Pankaj",Java");
function
myFunction(a, b) {
return
a * b;
}
var
x = myFunction(
4
,
3
);
Arrow Functions
// ES5
var
x =
function
(p, q) {
return
p * q;
}
// ES6
const
x = (p, q) => p * q;
Call Back function
A
JavaScript Callback
Function is a function that is passed as a parameter to another
JavaScript
function, and the
callback
function is run inside of the function it was passed into.
function p1(x){ return x; };
function p2(p1(1))
function p1(x){ return x;}
function p2(b, callback){ callback(b);}
p2(2,p1);
p2(3,function(){alert("Hi");})