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📖 HTML / CSS / JS Reference

Multi-Page Projects

Pages panel (right side of editor):
  Click a filename to switch pages
  Double-click a filename to rename it
  Click × to delete a page
  Click "+ new page" to add a page

Navigation links work automatically:
  <a href="about.html">About</a>
  → clicking in preview switches to that page

CSS and JS are SHARED — they apply to every page.

Page Structure

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Page Title</title>
  </head>
  <body>
    <!-- visible content here -->
  </body>
</html>

Common Tags

<h1>–<h6>  Headings    <p>     Paragraph
<strong>   Bold        <em>    Italic
<a href="url">Link</a>       <br> <hr>
<img src="url" alt="desc">
<div> Block container  <span> Inline
<ul> <ol> <li>  Lists

CSS (CSS tab — shared across all pages)

p      { color: blue; }        /* element  */
.box   { padding: 10px; }      /* class    */
#hdr   { text-align: center; } /* id       */
.row { display: flex; gap: 12px; }
.grid { display: grid; grid-template-columns: 1fr 1fr; }

JavaScript (JS tab — shared across all pages)

let el = document.getElementById("myId");
el.innerHTML = "New text!";
el.style.color = "red";
let val = document.getElementById("inp").value;
el.addEventListener("click", function() { ... });

Forms & Tables

<input type="text" id="name" placeholder="Name">
<button onclick="myFn()">Click</button>
<select id="pick"><option>One</option></select>

<table>
  <tr><th>Name</th><th>Score</th></tr>
  <tr><td>Alice</td><td>95</td></tr>
</table>
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ARIA
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