Question

hi i am new with javascript

What is the benefit of using this line

var that = this

An example

function Person( firstname, lastname, age ) {

this.firstname = firstname;

this.lastname = lastname;

this.age = age;

getfullname = function() {

return firstname + “ “ + lastname; }

var that = this;

this.sayHi = function() {

document.write( “Hi my name is “ + getfullname() + “ and I am “ + that.age + “years old.”);

} }

thanks

Answer 1

this is context sensitive. Using that makes sure that when sayHi is called it can use the this value from when getfullname was called.