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How to make Live Coding Editor using HTML CSS and JavaScript ?

In this article, we will implement a live coding editor using HTML, CSS, and JavaScript. This project will allow you to write and execute HTML, CSS, and JavaScript code in real-time, making it an excellent tool for learning and testing your code snippets.

Final Output

ppp

Prerequisite

Approach

  • Begin by defining the HTML, CSS, and JavaScript files in your project.
  • Create the HTML structure to build the user interface, including text areas, buttons, and iframes. Use HTML elements such as <textarea>, <button>, and <iframe>.
  • Apply CSS styles to the HTML elements for a visually appealing and user-friendly interface. Define fonts, colors, and layouts to enhance the appearance of the editor.
  • In JavaScript, we created a function to read the HTML CSS JS code, and to convert it into UI, and will display it in Iframe Tag.

Example: This example illustrates the creation of a Live Coding Editor project using HTML CSS & JavaScript.

HTML 
<!-- Index.html -->
<!DOCTYPE html>
<html>

<head>
    <title>Live Coding Editor</title>
    <link rel="stylesheet" 
          type="text/css" 
          href="style.css">
</head>

<body>
    <div id="editor">
        <div class="code-section">
            <label for="htmlCode">
                HTML Code:
            </label>
            <textarea id="htmlCode" 
                      class="code" 
                      placeholder=
                        "Enter HTML code here">
            </textarea>
        </div>
        <div class="code-section">
            <label for="cssCode">
                CSS Code:
            </label>
            <textarea id="cssCode" 
                      class="code" 
                      placeholder=
                        "Enter CSS code here">
            </textarea>
        </div>
        <div class="code-section">
            <label for="jsCode">
                JavaScript Code:
            </label>
            <textarea id="jsCode" 
                      class="code" 
                      placeholder=
                        "Enter JavaScript code here">
            </textarea>
        </div>
        <div class="code-section">
            <label for="output">
                Output:
            </label>
            <div id="output" 
                 class="code">
            </div>
        </div>
        <div id="menu">
            <button id="runButton">
                Run Code
            </button>
            <button id="clearButton">
                Clear Code
            </button>
            <a id="downloadButton" 
               download="code.zip">
                Download Code
            </a>
        </div>
    </div>
    <iframe id="preview"></iframe>
    <script src="script.js"></script>
    <script src=
"https://cdnjs.cloudflare.com/ajax/libs/jszip/3.5.0/jszip.min.js">
    </script>
    <script src=
"https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/1.3.8/FileSaver.min.js">
    </script>
</body>

</html>
CSS 
/* Style.css */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

#editor {
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding: 10px;
}

label {
    font-weight: bold;
    color: #007acc;
}

.code-section {
    margin-bottom: 20px;
}

#htmlCode,
#cssCode {
    background-color: #fff;
}

.code {
    width: 100%;
    height: 200px;
    padding: 10px;
    border: none;
    resize: none;
    font-family: "Courier New",
        monospace;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    padding: 5px 10px;
    background-color: #007acc;
    color: #fff;
    border: none;
    cursor: pointer;
    margin-right: 10px;
}

#downloadButton {
    text-decoration: none;
    background-color: #007acc;
    color: #fff;
    padding: 5px 10px;
    margin-right: 10px;
}

iframe {
    width: 100%;
    height: calc(100% - 320px);
    border: none;
}

#htmlCode::placeholder,
#cssCode::placeholder,
#jsCode::placeholder {
    color: hsl(113, 100%, 49%);
}

/* Styles for responsive UI */
@media (max-width: 768px) {
    .code-section {
        width: 100%;
        margin: 10px 0;
    }
    .code {
        width: 100%;
    }
}
/* Style for scrollable output box */
#output {
    background-color: #f0f0f0;
    border: 1px solid #ccc;
    padding: 10px;
    overflow-y: auto; 
    max-height: 300px; 
}
JavaScript 
// Script.js
const htmlCode = 
    document.getElementById('htmlCode');
const cssCode = 
    document.getElementById('cssCode');
const jsCode = 
    document.getElementById('jsCode');
const output = 
    document.getElementById('output')
const previewFrame = 
    document.getElementById('preview');
const runButton = 
    document.getElementById('runButton');
const clearButton = 
    document.getElementById('clearButton');
const downloadButton = 
    document.getElementById('downloadButton');

const updatePreview = () => {
    const html = htmlCode.value;
    const css = 
`<style>${cssCode.value}</style>`;
    const js = 
`<script>${jsCode.value}</script>`;

    const code = `${html}\n${css}\n${js}`;
    output.innerHTML = code;}

const clearCode=() => {
    htmlCode.value = '';
    cssCode.value = '';
    jsCode.value = '';
    updatePreview()}

const downloadCode = () => {
    const zip = new JSZip();
    zip.file("index.html", htmlCode.value);
    zip.file("styles.css", cssCode.value);
    zip.file("script.js", jsCode.value);

    zip.generateAsync({ type: "blob" }).
        then(function (content) {
        saveAs(content, "code.zip");
    })}

// Initial preview update
updatePreview();
downloadButton.addEventListener('click', () => {
    const zip = new JSZip();
    zip.file("index.html", htmlCode.value);
    zip.file("styles.css", cssCode.value);
    zip.file("script.js", jsCode.value);
    zip.generateAsync({ type: "blob" })
        .then( (content)=> {
            saveAs(content, "code.zip");
        })});
        
runButton.addEventListener('click', updatePreview);
clearButton.addEventListener('click', clearCode);
downloadButton.addEventListener('click', downloadCode);

Output 




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Type:
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Category:
 Coding
Sub Category:
 Tutorial
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