call bind apply example

call-bind-apply.js

// example 1

let name= {
    f: "Saurabh",
    l: "Kumar",
    printName: function(){
        console.log(this.f+ " "+this.l);
    }
}

name.printName();

let name2= {
    f: "Suman",
    l: "Kumar"
}

// function borrowing

name.printName.call(name2);

////////////////

// Example 2

let printName = function(){
    console.log(this.f+ " "+this.l);
}

printName.call(name);
printName.call(name2);

// Example 3

let printName2 = function(hometown,state){
    console.log(this.f+ " "+this.l+ " "+hometown+ " "+state);
}

printName2.call(name,"Bangalore","KA");
printName2.call(name2,"khagaria","Bihar");

// Apply method : only diff is we have to pass args as an array

printName2.apply(name,["Bangalore","KA"]);

printName2.apply(name2,["khagaria","Bihar"]);

// bind method : exactly look like call method, only diff is that it return the  function i.e copy of the object which can be called later

let printMyName = printName2.bind(name2,"khagaria","Bihar");

printMyName();
// console.log(printMyName());