How to format current date in MM/DD/YYYY HH:MM:SS format using JavaScript ?

13 Dec, 2019
Given a date and the task is to format the current date in MM/DD/YYYY HH:MM:SS format. Here are a few of the most techniques discussed with the help of JavaScript.
Approach 1:
Store the current date in variable.
Use the string concatenation technique to insert / and : in between the month-day and day-year.
Use .slice() method to format the day, month to 2 digits.
Example 1: This example implements the above approach.
<!DOCTYPE HTML> <html>   <head>     <title>         How to format current date in        MM/DD/YYYY HH:MM:SS format ?     </title></head>   <body style = "text-align:center;" id = "body">           <h1 id = "h1" style = "color:green;" >         GeeksForGeeks     </h1>          <p id = "GFG_UP" style =         "font-size: 15px; font-weight: bold;">    </p>          <button onclick = "gfg_Run()">         Click Here    </button>          <p id = "GFG_DOWN" style = "color:green;         font-size: 20px; font-weight: bold;">    </p>          <script>        var el_up = document.getElementById("GFG_UP");        var el_down = document.getElementById("GFG_DOWN");        var date = new Date();        el_up.innerHTML = "Click on the button to format"            + " the date accordingly.<br>Date = " + date;                  function gfg_Run() {            var Str =                ("00" + (date.getMonth() + 1)).slice(-2)                + "/" + ("00" + date.getDate()).slice(-2)                + "/" + date.getFullYear() + " "                + ("00" + date.getHours()).slice(-2) + ":"                + ("00" + date.getMinutes()).slice(-2)                + ":" + ("00" + date.getSeconds()).slice(-2);                              el_down.innerHTML = Str;        }    </script> </body>   </html>
Output:
Before clicking on the button:
After clicking on the button:
Approach 2:
Store the current date in a variable.
Use the .join() method to insert / and : in between the month-day and day-year.
Create a prototype padding to format the day, month to 2 digits.
Example 2: This example implements the above approach.
<!DOCTYPE HTML> <html>   <head>     <title>         How to format current date in        MM/DD/YYYY HH:MM:SS format ?    </title></head>   <body style = "text-align:center;">           <h1 style = "color:green;" >         GeeksForGeeks     </h1>          <p id = "GFG_UP" style =         "font-size: 15px; font-weight: bold;">    </p>          <button onclick = "gfg_Run()">         Click Here    </button>          <p id = "GFG_DOWN" style = "color:green;         font-size: 20px; font-weight: bold;">    </p>          <script>        var el_up = document.getElementById("GFG_UP");        var el_down = document.getElementById("GFG_DOWN");        var d = new Date();                  el_up.innerHTML = "Click on the button to format"                + " the date accordingly.<br>Date = " + d;        Number.prototype.padding = function(base, chr) {            var len = (String(base || 10).length                        - String(this).length) + 1;                                      return len > 0 ? new Array(len).join(chr || '0')                    + this : this;        }                  function gfg_Run() {            str = [(d.getMonth()+1).padding(),                    d.getDate().padding(),                    d.getFullYear()].join('/')                    + ' ' + [ d.getHours().padding(),                    d.getMinutes().padding(),                    d.getSeconds().padding()].join(':');            el_down.innerHTML = str;        }     </script> </body>   </html>
Output:
Before clicking on the button:
After clicking on the button:
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