Prerequisite:
• JavaScript | getDate()
• JavaScript | setDate()

Problem Statement:
In order to calculate yesterday’s date in JavaScript, we need to familiarize ourselves with 2 functions.

 dateObj.getDate() 

 dateObj.setDate()

Solution:

JavaScript allows us to create a platform independent date instance that represents a single moment in time using Date constructor. An empty Date constructor creates a new date object that represents the current date and time. The Date constructor can also be specified to create a date object that represents a particular date and time. We use getDate() function to fetch the current date from the date object and subtract one day from it using the setDate() function which sets yesterday’s date onto the date object.

Example 1:
Here we will get the yesterday date, in this example we will show the output compare to today’s date.
Syntax:

var dateObj = new Date(); 
// empty Date constructor representing current time
dateobj; 
// Current Time => Wed Jun 12 2019 20:52:24 GMT+0530 (India Standard Time)

The following programs illustrate the solution

Code:

Output:

// Returns Yesterday's date and time

Example 2:
Here we will get the yesterday date of pre-defined date which is Fri May 10 2019 16:30:00 GMT+0530 (India Standard Time).
Syntax:

var dateObj = new Date(2019, 04, 10, 16, 30, 00);
// specified Date constructor representing particular time   
dateObj; 
// Specific Time => Fri May 10 2019 16:30:00 GMT+0530 (India Standard Time)

Code:

Output:

Supported browser:
• Google Chrome
• Mozila Firefox
• Internet Explore
• Safari
• Opera