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.

<!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> 

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.

<!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> 

Output:

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

My Personal Notes

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