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Validation

Validation rules

The RichTextEditor provides the functionality of character count and its validation. So, you can validate the RichTextEditor’s value on form submission by applying validationRules and validationMessage to the RichTextEditor.

Rules Description
required Requires value for the RichTextEditor control.
minlength Requires the value to be of given minimum characters count.
maxlength Requires the value to be of given maximum characters count.

This sample is used to validate form using the obtrusive Validation. Type the values in RichTextEditor and the form enables the validation with the formvalidator rules by clicking on the submit externally. All rules are validated by the formvalidator rules.

Source
Preview
index.js
index.html
var defaultRTE = new ej.richtexteditor.RichTextEditor({ 
    showCharCount: true,
    maxLength: 100,
    placeholder: 'Type something' 
});
defaultRTE.appendTo('#defaultRTE');

new ej.inputs.FormValidator('#form-element');
<!DOCTYPE html><html lang="en"><head>
    <title>Essential JS 2 RichTextEditor</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="index.css" rel="stylesheet">
   <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-richtexteditor/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet">
     <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/dist/ej2.min.js" type="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="content" class="box-form" style="margin: 0 auto; width:750px; padding:25px">
            <form id="form-element" class="form-vertical">
                <div class="form-group">
                    <textarea id="defaultRTE" name="defaultRTE" required maxlength="100" minlength="20" data-msg-containerid="dateError">                    </textarea>
                    <div id="dateError" style="padding-top: 10px"></div>
                </div>
                <div style="text-align: center">
                    <button id="validateSubmit" class="samplebtn e-control e-btn" type="submit" data-ripple="true">Submit</button>
                    <button id="resetbtn" class="samplebtn e-control e-btn" type="reset" data-ripple="true">Reset</button>
                </div>
            </form>
        </div>
    </div>


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

Validation message

The default error message for a rule can be customizable by defining it along with the concern rule object as follows.

In the following sample, customize the error message along with the concern rule.

Source
Preview
index.js
index.html
var defaultRTE = new ej.richtexteditor.RichTextEditor({ 
  showCharCount: true,
  maxLength: 100,
  placeholder: 'Type something'
});
defaultRTE.appendTo('#defaultRTE');
  
  
var option = {
  rules: {
    // Initialize the custom message.
    defaultRTE: { 
      required: [true, 'Type the Value'],  
      minLength: [20, 'Need atleast 6 character length'], 
      maxLength:[100, 'Maximum 100 character only']
    }  
  },
  customPlacement: function (inputElement, dateError) {
      document.getElementById('dateError').appendChild(dateError);
  }
};
  
var formObject = new ej.inputs.FormValidator('#form-element', option);
<!DOCTYPE html><html lang="en"><head>
    <title>Essential JS 2 RichTextEditor</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="index.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-richtexteditor/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet">
     <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/dist/ej2.min.js" type="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="content" class="box-form" style="margin: 0 auto; width:750px; padding:25px">
           
            <form id="form-element" class="form-vertical">
                <div class="form-group">
                    <textarea id="defaultRTE" required name="defaultRTE" class="form-control"></textarea>
                    <div id="dateError" style="padding-top: 10px"></div>
                </div>
                <div class="form-group">
                    <div class="col-sm-3 control-label"></div>
                    <div class="col-sm-6">
                        <div id="error"></div>
                    </div>
                </div>
                <div style="text-align: center">
                    <button id="validateSubmit" class="samplebtn e-control e-btn" type="submit" data-ripple="true">Submit</button>
                    <button id="resetbtn" class="samplebtn e-control e-btn" type="reset" data-ripple="true">Reset</button>
                </div>
            </form>
            
        </div>
    </div>


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

Custom placement of validation message

The FormValidator has an event customPlacement which can be used to place the error message from default position to desired custom location.

Source
Preview
index.js
index.html
ej.base.enableRipple(true);

var defaultRTE = new ej.richtexteditor.RichTextEditor({ showCharCount: true, maxLength: 100, placeholder: 'Type something' });
defaultRTE.appendTo('#defaultRTE');

var option = {
    rules: {
        // Initialize the CustomPlacement.
        defaultRTE: { required: [true, 'RTE: value is required'], minLength: [15, 'RTE: Need atleast 6 character length'], maxLength: [100, 'RTE: Maximum 100 character only'] }
    },
    customPlacement: function (inputElement, error) {
        document.getElementById('error').appendChild(error);
    }
};

var formObject = new ej.inputs.FormValidator('#form-element', option);
<!DOCTYPE html><html lang="en"><head>
    <title>Essential JS 2 RichTextEditor</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="index.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-richtexteditor/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet">
     <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/dist/ej2.min.js" type="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="content" class="box-form" style="margin: 0 auto; width:750px; padding:25px">
           
            <form id="form-element" class="form-vertical">
                <div class="form-group">
                    <textarea id="defaultRTE" required name="defaultRTE" class="form-control"></textarea>
                    <div id="dateError" style="padding-top: 10px"></div>
                </div>
                <div class="form-group">
                    <div class="col-sm-3 control-label"></div>
                    <div class="col-sm-6">
                        <div id="error"></div>
                    </div>
                </div>
                <div style="text-align: center">
                    <button id="validateSubmit" class="samplebtn e-control e-btn" type="submit" data-ripple="true">Submit</button>
                    <button id="resetbtn" class="samplebtn e-control e-btn" type="reset" data-ripple="true">Reset</button>
                </div>
            </form>
            
        </div>
    </div>


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