Strict Mode in EJ2 JavaScript DatePicker Control

26 Jun 20246 minutes to read

The strictMode is an act, that allows the user to enter only the valid date within the specified min/max
range in textbox. If the date is invalid, then the component will stay with the previous value. Else, if the date is out of range, then the component will set the date to the min/max date.

The following example demonstrates the DatePicker in strictMode with min/max range of 5th to 25th in a month of May. Here, it allows to enter
only the valid date within the specified range. If you are trying to enter the out-of-range value as like 28th of May, then the value will set to the max date of 25th May. Since the value 28th is greater than to max value of 25th. Or else if you are trying to enter the invalid date, then the value will stay with the previous value.

var datepicker = new ej.calendars.DatePicker({
        placeholder: 'Choose a date',
              // sets the value
        value: new Date('27/10/2017'),
                //sets the min
         min: new Date('5/5/2017'),
                //sets the max
         max: new Date('5/25/2017'),
                // sets the format
        format: 'dd/MM/yyyy',
    });
    datepicker.appendTo('#element');
<!DOCTYPE html><html lang="en"><head>
    <title>Essential JS 2 DatePicker control</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="styles.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-base/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-popups/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-calendars/styles/material.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/28.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <input id="element" type="text">
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

By default, the DatePicker act in strictMode false state, that allows to enter the invalid or out-of-range date in textbox.

If the date is out-of-range or invalid, then the model value will be set to out of range date value or null respectively with highlighted error class to indicates the date is out of range or invalid.

The following example demonstrates the strictMode as false. Here, it allows to enter the valid or invalid value in textbox. If you are entering out-of-range or invalid date value, then the model value will be set to out of range date value or null respectively with highlighted error class to indicates the date is out of range or invalid.

var datepicker = new ej.calendars.DatePicker({
        placeholder: 'Choose a date',
              // sets the value
        value: new Date('27/10/2017'),
                //sets the min
         min: new Date('5/5/2017'),
                //sets the max
         max: new Date('5/25/2017'),
                // sets the format
        format: 'dd/MM/yyyy',
    });
    datepicker.appendTo('#element');
<!DOCTYPE html><html lang="en"><head>
    <title>Essential JS 2 DatePicker control</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="styles.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-base/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-popups/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-calendars/styles/material.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/28.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <input id="element" type="text">
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

 If the value of min or max properties changed through code behind, then you have to update the value property to set within the range.