How to select Min/Max dates in an array using JavaScript ?

Given an array of JavaScript date. The task is to get the minimum and maximum date of the array using JavaScript.

Approach 1:

  • Get the JavaScript dates in an array.
  • Use Math.max.apply() and Math.min.apply() function to get the maximum and minimum dates respectively.

Example: In this example, the maximum and minimum date is determined by the above approach.



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<!DOCTYPE HTML> 
<html> 
  
<head> 
    <title> 
        JavaScript | Min/Max of dates in an array.
    </title>
</head> 
  
<body style = "text-align:center;" id = "body"> 
      
    <h1 style = "color:green;" > 
        GeeksForGeeks
    </h1>
      
    <p id = "GFG_UP" style =
        "font-size: 19px; font-weight: bold;">
    </p>
      
    <button onclick = "GFG_Fun()">
        click here
    </button>
      
    <p id = "GFG_DOWN" style =
        "color: green; font-size: 24px; font-weight: bold;">
    </p>
      
    <script>
        var el_up = document.getElementById("GFG_UP");
        var el_down = document.getElementById("GFG_DOWN");
        var dates = [];
          
        dates.push(new Date("2019/06/25"));
        dates.push(new Date("2019/06/26"));
        dates.push(new Date("2019/06/27"));
        dates.push(new Date("2019/06/28"));
          
        el_up.innerHTML = dates[0] + "<br>" + dates[1]
                + "<br>" + dates[2] + "<br>" + dates[3];
          
        function GFG_Fun() {
            var maximumDate=new Date(Math.max.apply(null, dates));
            var minimumDate=new Date(Math.min.apply(null, dates));
              
            el_down.innerHTML = "Max date is - " + maximumDate
                    + "<br>Min date is - " + minimumDate;
        }
    </script> 
</body> 
  
</html>

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Output:


    

  • Before clicking on the button:
    

    • 

  • After clicking on the button:
    

    • 



Approach 2:


    

  • Get the JavaScript dates in an array.
    • 

  • Use reduce() method in an array of dates and define the respective function for the maximum and minimum dates.
    • 



Example: In this example, the maximum and minimum date is determined by the above approach.











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<!DOCTYPE HTML>  


<html>  


  


<head>  


    <title>  


        JavaScript | Min/Max of dates in an array. 


    </title> 


</head>  


  


<body style = "text-align:center;" id = "body">  


      


    <h1 style = "color:green;" >  


        GeeksForGeeks 


    </h1> 


      


    <p id = "GFG_UP" style = 


        "font-size: 19px; font-weight: bold;"> 


    </p> 


      


    <button onclick = "GFG_Fun()"> 


        click here 


    </button> 


      


    <p id = "GFG_DOWN" style = 


        "color: green; font-size: 24px; font-weight: bold;"> 


    </p> 


      


    <script> 


        var el_up = document.getElementById("GFG_UP"); 


        var el_down = document.getElementById("GFG_DOWN"); 


        var dates = []; 


          


        dates.push(new Date("2019/06/25")); 


        dates.push(new Date("2019/06/26")); 


        dates.push(new Date("2019/06/27")); 


        dates.push(new Date("2019/06/28")); 


          


        el_up.innerHTML = dates[0] + "<br>" + dates[1] 


                + "<br>" + dates[2] + "<br>" + dates[3]; 


          


        function GFG_Fun() { 


            var mnDate = dates.reduce(function (a, b) { 


                return a < b ? a : b;  


            });  


              


            var mxDate = dates.reduce(function (a, b) { 


                return a > b ? a : b; 


            }); 


              


            el_down.innerHTML = "Max date is - " + mxDate  


                        + "<br>Min date is - " + mnDate; 


        } 


    </script>  


</body>  


  


</html> 



















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Output:


    

  • Before clicking on the button:
    

    • 

  • After clicking on the button:
    

    • 






    

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