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Customize the textbox background-color and text-color

You can customize the textbox styles such as background-color, text-color and border-color by overriding its default styles.

To change the styles of the floating label, you must override the style to the input element.

Source
Preview
index.html
index.ts
index.css
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 TextBox</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 TextBox Components" />
    <meta name="author" content="Syncfusion" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/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-buttons/styles/material.css" rel="stylesheet" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>
<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div class='wrap'>



        <label>Normal Input</label>
            <div class="e-input-group">
                <input class="e-input" type="text" placeholder="First Name" />
            </div>
        <label> Floating Input </label>
            <div class="e-float-input">
                <input type="text" required />
                <span class="e-float-line"> </span>
                <label class="e-float-text">Last Name</label>
            </div>




            <div id="input-container">
          </div>
        </div>
    </div>
</body>
</html>
// To get the all input fields and its container.

let inputElement = document.querySelectorAll('.e-input-group .e-input,.e-float-input.e-input-group input');

// Add 'e-input-focus' class to the input for achive ripple effect when focus on the input field.

for (let i = 0; i < inputElement.length; i++) {
    inputElement[i].addEventListener("focus", function () {
            this.parentNode.classList.add('e-input-focus');
    });
    inputElement[i].addEventListener("blur", function () {
            this.parentNode.classList.remove('e-input-focus');
    });
}
.wrap {
  box-sizing: border-box;
  margin: 0 auto;
  padding: 20px 10px;
  width: 260px;
}

.wrap label { /* csslint allow: adjoining-classes */
 font-weight:bold;
}

.wrap .e-float-input {/* csslint allow: adjoining-classes */
   margin:30px 0;
}

.wrap .e-input-group {/* csslint allow: adjoining-classes */
   margin:25px 0;
}


/* To change the background-color and text-color for textbox */ 
.e-input-group,
.e-float-input,
.e-float-input.e-input-group { /* csslint allow: adjoining-classes */
  background : lightgray;
  color: green;
}

/* To change the border-color of the textbox */ 
.e-input-group:not(.e-success):not(.e-warning):not(.e-error):not(.e-float-icon-left),
.e-input-group:hover:not(.e-success):not(.e-warning):not(.e-error):not(.e-float-icon-left) { /* csslint allow: adjoining-classes */
  border-color: #0800ff;
}

/* To change the border-color of the floating-label textbox */ 
.e-float-input input,
.e-float-input:hover:not(.e-input-group):not(.e-success):not(.e-warning):not(.e-error):not(.e-disabled) input:not([disabled]) { /* csslint allow: adjoining-classes */
    border-color: #0800ff;
}