How can I implement lightning-formatted text in developing applications?

In the context of Salesforce, you can implement lightning-formatted rich text in your developing web-based application by using HTML, CSS, and JavaScript along with any relevant libraries or framework. Here is the example given below:-

HTML:-

    <meta</span> charset=”UTF-8”>

    <meta</span> name=”viewport” content=”width=device-width, initial-scale=1.0”>

   

            Bold

            Italic

            Underline

            Strikethrough

            Align Left

            Align Center

            Align Right

            Justify

            Numbered List

            Bullet List

            New Line

            Remove Format

    [removed]

        Function execCmd(command) {

            Document.execCommand(command, false, null);

        }

    [removed]

CSS :-

Body {
    Font-family: Arial, sans-serif;
    Background-color: #f9f9f9;
    Margin: 0;
    Padding: 0;
}
.toolbar {
    Background-color: #fff;
    Border-bottom: 1px solid #ccc;
    Padding: 10px;
    Box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}
.toolbar button {
    Padding: 6px 12px;
    Margin-right: 10px;
    Border: none;
    Background-color: #f4f4f4;
    Color: #333;
    Border-radius: 3px;
    Cursor: pointer;
    Transition: background-color 0.3s ease;
}
.toolbar button:hover {
    Background-color: #e0e0e0;
}
#editor-container {
    Max-width: 800px;
    Margin: 20px auto;
    Background-color: #fff;
    Border: 1px solid #ccc;
    Box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}
#editor {
    Padding: 20px;
    Min-height: 300px;
    Outline: none;
}
::-moz-selection {
    Background-color: #b3d4fc;
    Color: #000;
}
::selection {
    Background-color: #b3d4fc;
    Color: #000;
}
[removed]-
Function execCmd(command, value = null) {
    Document.execCommand(command, false, value);
}
Function insertLink() {
    Const url = prompt(‘Enter the URL:’);
    If (url) {
        execCmd(‘createLink’, url);
    }
}
Function insertImage() {
    Const url = prompt(‘Enter the image URL:’);
    If (url) {
        execCmd(‘insertImage’, url);
    }
}
Function customCommand(command, arg) {
    Document.execCommand(‘styleWithCSS’, false, true);
    Document.execCommand(command, false, arg);
    Document.execCommand(‘styleWithCSS’, false, false);
}
Document.addEventListener(‘DOMContentLoaded’, function() {
    Const boldButton = document.getElementById(‘boldButton’);
    boldButton.addEventListener(‘click’, function() {
        customCommand(‘bold’);
    });

    Const italicButton = document.getElementById(‘italicButton’);

    italicButton.addEventListener(‘click’, function() {
        customCommand(‘italic’);
    });
    Const underlineButton = document.getElementById(‘underlineButton’);
    underlineButton.addEventListener(‘click’, function() {
        customCommand(‘underline’);
    });
    Const strikeThroughButton = document.getElementById(‘strikeThroughButton’);
    strikeThroughButton.addEventListener(‘click’, function() {
        customCommand(‘strikeThrough’);
    });
    Const alignLeftButton = document.getElementById(‘alignLeftButton’);
    alignLeftButton.addEventListener(‘click’, function() {
        customCommand(‘justifyLeft’);
    });
    Const alignCenterButton = document.getElementById(‘alignCenterButton’);
    alignCenterButton.addEventListener(‘click’, function() {
        customCommand(‘justifyCenter’);
    });
    Const alignRightButton = document.getElementById(‘alignRightButton’);
    alignRightButton.addEventListener(‘click’, function() {
        customCommand(‘justifyRight’);
    });
    Const insertLinkButton = document.getElementById(‘insertLinkButton’);
    insertLinkButton.addEventListener(‘click’, function() {
        insertLink();
    });
    Const insertImageButton = document.getElementById(‘insertImageButton’);
    insertImageButton.addEventListener(‘click’, function() {
        insertImage();
    });
});