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How to convert JSON results into a date using JavaScript ?

  • Last Updated : 31 Oct, 2019

The task is to convert a JSON result to JavaScript Date with the help of JavaScript. There are few two methods which are discussed below:

Approach 1:

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  • Use substr() method to get the integer part of string.
  • Use the parseInt() method followed by Date() to get the JavaScript date.

Example: This example implements the above approach.




<!DOCTYPE HTML> 
<html
  
<head
    <title
        How to convert JSON results into
        a date using JavaScript ?
    </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 jsonDate = '/Date(1559083200000)/';
          
        el_up.innerHTML = "Click on the button to convert"
                    + " JSON result to JavaScript Date."
                    + "<br>JSON Date - " + jsonDate;
          
        function gfg_Run() {
            var date = new Date(parseInt(jsonDate.substr(6)));
            el_down.innerHTML = date;
        }         
    </script
</body
  
</html>

Output:



  • Before clicking on the button:
  • After clicking on the button:

Approach 2:

  • Use the regExp to get the integer part of string.
  • Use the Date() method to get the JavaScript date.

Example: This example implements the above approach.




<!DOCTYPE HTML> 
<html
  
<head
    <title
        How to convert JSON results into
        a date using JavaScript ?
    </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 jsonDate = '/Date(1559083200000)/';
          
        el_up.innerHTML = "Click on the button to convert"
                    + " JSON result to JavaScript Date."
                    + "<br>JSON Date - " + jsonDate;
          
        function gfg_Run() {
            var date = new Date(jsonDate.match(/\d+/)[0] * 1);
            el_down.innerHTML = date;
        }         
    </script
</body
  
</html>

Output:

  • Before clicking on the button:
  • After clicking on the button:



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