JavaScript: Create a clock and display the time in each second

JavaScript Object: Exercise-8 with Solution

Create Clock

Write a JavaScript program to create a clock.
Note: The output will come every second.
Expected Console Output:
"14:37:42"
"14:37:43"
"14:37:44"
"14:37:45"
"14:37:46"
"14:37:47"

Sample Solution:

JavaScript Code:

function my_Clock() 
  {
  this.cur_date = new Date();
  this.hours = this.cur_date.getHours();
  this.minutes = this.cur_date.getMinutes();
  this.seconds = this.cur_date.getSeconds();
  }
my_Clock.prototype.run = function ()
  {
  setInterval(this.update.bind(this), 1000);
  };
my_Clock.prototype.update = function () 
  {
  this.updateTime(1);
  console.log(this.hours + ":" + this.minutes + ":" + this.seconds);
  };
my_Clock.prototype.updateTime = function (secs) 
  {
  this.seconds+= secs;
 if (this.seconds >= 60)
  {
  this.minutes++;
  this.seconds= 0;
  }
 if (this.minutes >= 60)
  {
  this.hours++;
  this.minutes=0;
  }
if (this.hours >= 24)
  {
  this.hours = 0;
  }
};
var clock = new my_Clock();
  clock.run();
  

Output:

14:45:52
14:45:53
14:45:54
14:45:55
14:45:56
14:45:57
14:45:58
14:45:59
14:46:0
-----

Flowchart:

Live Demo:

See the Pen javascript-object-exercise-8 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that displays a digital clock updating every second in HH:MM:SS format.
• Write a JavaScript function that toggles between a digital and an analog clock on the webpage.
• Write a JavaScript function that allows the user to switch between 12-hour and 24-hour clock formats.
• Write a JavaScript function that updates a designated div with the current time each second using setInterval.

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