Function chaining in Js

Function chaining is nothing but grouping functions in one single line using dot notation.

var Math = function(initialValue){
 this.initialValue = initialValue;

 this.add = function(i){
  this.initialValue = this.initialValue + i
  return this;
 };
 this.subtract = function(i){
  this.initialValue = this.initialValue - i
  return this;
 };
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 this.multiply = function(i){
  this.initialValue = this.initialValue * i
  return this;
 };
 
 this.divide = function(i){
  this.initialValue = this.initialValue / i
  return this;
 };
 this.done = function(){
  return this.initialValue
 }
}

function main() {
 const x = new Math(10);
if (x.add(3).multiply(2).add(4).subtract(6).divide(4).done() === 6) {
 console.log(‘true’);
 } else {
 console.log(‘false’);
 }
}
main();

Disclaimer — Question asked in Paypal Interview🤓!