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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>JS Visualizer — Layout Playground</title>
<link rel="preconnect" href="https://fonts.googleapis.com">
<link href="https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600&display=swap" rel="stylesheet">
<style>
/* ── Shell ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
background: #07070f; color: #c9d1d9;
height: 100vh; overflow: hidden; display: flex; font-size: 14px;
}
#controls {
width: 272px; min-width: 272px; background: #0b0b18;
border-right: 1px solid #16162a; overflow-y: auto; display: flex; flex-direction: column;
}
.ctrl-header { padding: 14px 16px 11px; border-bottom: 1px solid #16162a; }
.ctrl-title { font-size: 10px; font-weight: 700; color: #404070; text-transform: uppercase; letter-spacing: 0.12em; }
.ctrl-subtitle { font-size: 13px; font-weight: 600; color: #8080b0; margin-top: 2px; }
.ctrl-group { padding: 12px 16px; border-bottom: 1px solid #111124; }
.ctrl-label { font-size: 9px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.12em; color: #303055; margin-bottom: 9px; }
/* Presets */
.preset-list { display: flex; flex-direction: column; gap: 5px; }
.preset-btn {
padding: 8px 11px; border-radius: 6px; border: 1px solid #1a1a32;
background: #0f0f22; color: #606090; font-size: 11px; font-family: inherit;
cursor: pointer; text-align: left; transition: all 0.12s; display: flex; align-items: center; gap: 8px;
}
.preset-btn:hover { border-color: #303060; color: #9090c0; }
.preset-btn.on { background: #18244a; border-color: #2d4888; color: #7aaaf0; }
.preset-icon { font-size: 14px; }
.preset-desc { font-size: 10px; color: #404060; margin-top: 1px; }
/* Toggles */
.toggle-row { display: flex; gap: 5px; }
.toggle-btn {
flex: 1; padding: 6px 4px; border-radius: 5px; border: 1px solid #1a1a32;
background: #0f0f22; color: #404068; font-size: 10.5px; font-family: inherit;
cursor: pointer; text-align: center; transition: all 0.12s;
}
.toggle-btn:hover { color: #7070a0; border-color: #2a2a48; }
.toggle-btn.on { background: #18244a; border-color: #2d4888; color: #5b8fe0; }
/* Preview */
#preview-area { flex: 1; display: flex; flex-direction: column; overflow: hidden; min-width: 0; }
#preview { flex: 1; overflow: auto; }
/* Prompt strip */
#prompt-strip {
border-top: 1px solid #16162a; background: #0b0b18;
padding: 10px 16px; display: flex; align-items: center; gap: 10px; min-height: 50px;
}
#prompt-text { flex: 1; font-family: ui-monospace, 'SF Mono', monospace; font-size: 11px; color: #505088; line-height: 1.55; }
#copy-btn {
flex-shrink: 0; padding: 5px 12px; border-radius: 5px;
border: 1px solid #222240; background: #14142a; color: #505088;
font-size: 11px; font-family: inherit; cursor: pointer; transition: all 0.15s; white-space: nowrap;
}
#copy-btn:hover { border-color: #3a3a70; color: #8080c0; }
#copy-btn.copied { border-color: #1e5c3a; color: #2db872; }
::-webkit-scrollbar { width: 5px; } ::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #1e1e38; border-radius: 3px; }
/* ── Mock Page (Terminal Neon) ──────────────────────────────────────── */
#mock {
--bg: #0d1117; --surface: #161b22; --card: #1c2128; --border: #30363d;
--text: #e6edf3; --muted: #8b949e; --subtle: #21262d;
--a1: #06b6d4; --a2: #ec4899; --a3: #a855f7;
--ok: #10b981; --warn: #f97316; --err: #ef4444;
--r: 8px; --code-bg: #0d1117;
--fs-body: 14px; --fs-code: 13px; --fs-ui: 11px;
min-height: 100%;
background: var(--bg); color: var(--text);
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
font-size: var(--fs-body);
transition: font-size 0.15s;
}
/* Navbar */
.m-nav {
background: var(--surface); border-bottom: 1px solid var(--border);
padding: 0 20px; height: 46px; display: flex; align-items: center; gap: 10px;
}
.m-nav-back { font-size: 12px; color: var(--muted); }
.m-nav-sep { color: var(--border); }
.m-nav-brand { font-size: 14px; font-weight: 700; color: var(--a1); }
.m-nav-crumb { font-size: 12px; color: var(--muted); }
.m-nav-space { flex: 1; }
.m-nav-pill { font-size: 10px; font-weight: 600; padding: 3px 10px; border-radius: 99px; border: 1px solid var(--a1); color: var(--a1); opacity: 0.7; }
/* Header */
.m-header { padding: 22px 20px 18px; border-bottom: 1px solid var(--border); }
.m-header-row { display: flex; align-items: flex-start; gap: 14px; }
.m-icon { width: 46px; height: 46px; border-radius: var(--r); background: var(--card); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 24px; flex-shrink: 0; }
.m-title { font-size: 24px; font-weight: 700; letter-spacing: -0.02em; }
.m-sub { font-size: var(--fs-ui); color: var(--muted); margin-top: 3px; }
.m-tags { display: flex; gap: 5px; margin-top: 10px; flex-wrap: wrap; }
.m-tag { padding: 2px 9px; border-radius: 99px; border: 1px solid var(--border); background: var(--card); font-size: 10px; color: var(--muted); }
.m-tag-a1 { border-color: var(--a1); color: var(--a1); }
.m-tag-a2 { border-color: var(--a2); color: var(--a2); }
/* Phase banner */
.m-phase {
margin: 14px 20px 0;
padding: 9px 14px; border-radius: var(--r); border: 1px solid var(--border);
background: var(--subtle); display: flex; align-items: center; gap: 8px;
}
.m-phase-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--a1); flex-shrink: 0; }
.m-phase-label { font-size: var(--fs-ui); font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--a1); }
.m-phase-desc { font-size: var(--fs-ui); color: var(--muted); }
.m-phase-step { margin-left: auto; font-family: 'Fira Code', monospace; font-size: var(--fs-ui); color: var(--muted); }
/* Main wrapper */
.m-main { padding: 16px 20px 32px; display: flex; flex-direction: column; gap: 14px; }
/* ── Layout variants ───────────────────────────────────────────────── */
/* Default: steps bottom, explain in col (3-col) */
.m-layout { display: contents; }
/* Steps */
.m-steps {
background: var(--surface); border: 1px solid var(--border); border-radius: var(--r);
padding: 11px 18px; display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap;
}
.s-btn { padding: 7px 15px; border-radius: calc(var(--r) - 2px); border: 1px solid var(--border); background: var(--card); color: var(--muted); font-size: var(--fs-ui); cursor: default; font-family: inherit; white-space: nowrap; }
.s-btn-primary { background: var(--a1); border-color: var(--a1); color: #000; font-weight: 600; }
.s-dots { display: flex; gap: 5px; align-items: center; }
.s-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--border); }
.s-dot.on { background: var(--a1); width: 18px; border-radius: 4px; }
.s-dot.done { background: color-mix(in srgb, var(--a1) 40%, var(--border)); }
.s-counter { font-size: var(--fs-ui); color: var(--muted); min-width: 130px; text-align: center; font-family: 'Fira Code', monospace; }
.s-counter b { color: var(--text); }
/* 3-col panels */
.m-panels { display: grid; gap: 14px; }
#mock.explain-col .m-panels { grid-template-columns: 5fr 4fr 3fr; }
#mock.explain-row .m-panels { grid-template-columns: 5fr 4fr; }
#mock.explain-row .m-panel-explain { display: none; }
/* Explain row (own full-width row) */
.m-explain-row { display: none; }
#mock.explain-row .m-explain-row { display: block; }
/* Step position: top */
#mock.steps-top .m-steps-bottom { display: none; }
#mock.steps-top .m-steps-top { display: flex; }
#mock.steps-bottom .m-steps-bottom { display: flex; }
#mock.steps-bottom .m-steps-top { display: none; }
/* Panel */
.m-panel { background: var(--card); border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; }
.m-panel-code { box-shadow: 0 0 20px rgba(6,182,212,0.16); }
.m-panel-mem { box-shadow: 0 0 20px rgba(236,72,153,0.16); }
.m-panel-explain { box-shadow: 0 0 14px rgba(168,85,247,0.14); }
.m-panel-head { padding: 8px 13px; border-bottom: 1px solid var(--border); background: var(--surface); display: flex; align-items: center; gap: 7px; }
.m-pdot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
.m-ptitle { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.09em; }
.m-pbadge { margin-left: auto; font-size: 9px; padding: 2px 7px; border-radius: 99px; border: 1px solid currentColor; opacity: 0.65; }
/* Code body */
.m-code-body { padding: 10px 0; font-family: 'Fira Code', monospace; font-size: var(--fs-code); line-height: 1.8; background: var(--code-bg); }
.c-line { display: flex; align-items: baseline; padding: 0 13px; gap: 9px; }
.c-line.active { background: color-mix(in srgb, var(--a1) 10%, transparent); border-left: 2px solid var(--a1); padding-left: 11px; }
.c-num { min-width: 18px; text-align: right; font-size: 10.5px; color: var(--border); user-select: none; flex-shrink: 0; }
.c-line.active .c-num { color: var(--a1); }
.c-sep { height: 5px; }
.kw { color: var(--a2); } .fn { color: var(--a1); } .str { color: var(--ok); }
.cm { color: var(--muted); font-style: italic; font-size: 0.9em; }
/* Memory */
.m-mem-body { padding: 11px 13px; }
.mem-phase { font-size: 9px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; padding: 2px 9px; border-radius: 99px; display: inline-block; margin-bottom: 10px; border: 1px solid var(--a2); background: color-mix(in srgb, var(--a2) 10%, transparent); color: var(--a2); }
.mem-table { width: 100%; border-collapse: collapse; font-family: 'Fira Code', monospace; }
.mem-table th { text-align: left; padding: 3px 7px; font-size: 9px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; border-bottom: 1px solid var(--border); }
.mem-table td { padding: 6px 7px; border-bottom: 1px solid color-mix(in srgb, var(--border) 50%, transparent); font-size: var(--fs-ui); }
.mem-table tr:last-child td { border-bottom: none; }
.t-var { color: var(--warn); } .t-let { color: var(--a2); }
.t-undef { color: var(--muted); } .t-tdz { color: var(--err); } .t-val { color: var(--ok); }
.mem-error { margin-top: 10px; padding: 8px 10px; border-radius: 5px; background: color-mix(in srgb, var(--err) 8%, transparent); border: 1px solid color-mix(in srgb, var(--err) 30%, transparent); }
.mem-err-label { font-size: 9px; font-weight: 700; color: var(--err); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 3px; }
.mem-err-msg { font-family: 'Fira Code', monospace; font-size: 10.5px; color: var(--err); opacity: 0.85; line-height: 1.5; }
/* Explain panel */
.m-explain-body { padding: 13px; }
.ex-num { font-size: 9px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); margin-bottom: 4px; }
.ex-title { font-weight: 700; color: var(--text); margin-bottom: 6px; line-height: 1.3; }
.ex-body { color: var(--muted); line-height: 1.7; }
.ex-body code { font-family: 'Fira Code', monospace; color: var(--a1); font-size: 0.9em; }
.ex-body strong { color: var(--text); }
.ex-tip { margin-top: 10px; padding: 8px 10px; background: color-mix(in srgb, var(--a1) 7%, transparent); border-left: 2px solid var(--a1); border-radius: 0 5px 5px 0; color: var(--a1); line-height: 1.5; }
.ex-tip code { font-family: 'Fira Code', monospace; font-size: 0.9em; }
/* explain-row wide layout */
#mock.explain-row .m-explain-row .m-explain-body {
display: flex; gap: 24px; align-items: flex-start;
}
#mock.explain-row .m-explain-row .ex-left { flex: 1; min-width: 0; }
#mock.explain-row .m-explain-row .ex-right { width: 260px; flex-shrink: 0; }
/* Console */
.m-console { background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; }
.m-con-head { padding: 7px 13px; background: var(--surface); border-bottom: 1px solid var(--border); font-size: 10px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; display: flex; align-items: center; gap: 5px; }
.m-con-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--a1); }
.m-con-body { padding: 9px 13px; font-family: 'Fira Code', monospace; font-size: var(--fs-code); }
.m-con-line { display: flex; gap: 8px; padding: 2px 0; }
.m-con-prompt { color: var(--border); user-select: none; }
.co-warn { color: var(--warn); } .co-ok { color: var(--ok); } .co-err { color: var(--err); }
/* Font size classes */
#mock.fs-sm { --fs-body: 13px; --fs-code: 12px; --fs-ui: 10.5px; }
#mock.fs-md { --fs-body: 14px; --fs-code: 13px; --fs-ui: 11px; }
#mock.fs-lg { --fs-body: 15px; --fs-code: 14px; --fs-ui: 11.5px; }
#mock.fs-xl { --fs-body: 16px; --fs-code: 15px; --fs-ui: 12px; }
</style>
</head>
<body>
<!-- Controls -->
<div id="controls">
<div class="ctrl-header">
<div class="ctrl-title">JS Visualizer</div>
<div class="ctrl-subtitle">Layout Explorer</div>
</div>
<div class="ctrl-group">
<div class="ctrl-label">Quick Presets</div>
<div class="preset-list" id="presets"></div>
</div>
<div class="ctrl-group">
<div class="ctrl-label">Step Controls Position</div>
<div class="toggle-row" id="t-steps"></div>
</div>
<div class="ctrl-group">
<div class="ctrl-label">Explanation Panel</div>
<div class="toggle-row" id="t-explain"></div>
</div>
<div class="ctrl-group">
<div class="ctrl-label">Font Size</div>
<div class="toggle-row" id="t-font"></div>
</div>
<div class="ctrl-group">
<div class="ctrl-label">Phase Banner</div>
<div class="toggle-row" id="t-banner"></div>
</div>
<div class="ctrl-group">
<div class="ctrl-label">Console</div>
<div class="toggle-row" id="t-console"></div>
</div>
</div>
<!-- Preview + Prompt -->
<div id="preview-area">
<div id="preview">
<div id="mock" class="steps-bottom explain-col fs-md banner-show console-show">
<!-- Navbar -->
<nav class="m-nav">
<span class="m-nav-back">← Back</span>
<span class="m-nav-sep">/</span>
<span class="m-nav-brand">JS Visualized</span>
<span class="m-nav-sep">/</span>
<span class="m-nav-crumb">01 Fundamentals / Hoisting</span>
<span class="m-nav-space"></span>
<span class="m-nav-pill">Interactive</span>
</nav>
<!-- Header -->
<div class="m-header">
<div class="m-header-row">
<div class="m-icon">⬆️</div>
<div>
<div class="m-title">Hoisting</div>
<div class="m-sub">How JavaScript moves declarations to the top before execution</div>
</div>
</div>
<div class="m-tags">
<span class="m-tag m-tag-a1">Memory Model</span>
<span class="m-tag m-tag-a2">TDZ</span>
<span class="m-tag">ES5</span>
<span class="m-tag">Compilation Phase</span>
<span class="m-tag">Execution Phase</span>
</div>
</div>
<!-- Phase banner -->
<div class="m-phase" id="m-phase-banner">
<div class="m-phase-dot"></div>
<span class="m-phase-label">Compilation Phase</span>
<span class="m-phase-desc">— allocating var declarations</span>
<span class="m-phase-step">Step 2 / 7</span>
</div>
<!-- Main -->
<div class="m-main">
<!-- Steps TOP slot -->
<div class="m-steps m-steps-top">
<button class="s-btn">← Prev</button>
<div class="s-dots">
<div class="s-dot done"></div><div class="s-dot on"></div>
<div class="s-dot"></div><div class="s-dot"></div><div class="s-dot"></div><div class="s-dot"></div><div class="s-dot"></div>
</div>
<div class="s-counter"><b>Compilation</b> · 2 / 7</div>
<button class="s-btn">Next →</button>
<button class="s-btn s-btn-primary">⏵ Auto-play</button>
</div>
<!-- 3-col panels -->
<div class="m-panels">
<!-- Code -->
<div class="m-panel m-panel-code">
<div class="m-panel-head">
<div class="m-pdot" style="background:var(--a1)"></div>
<span class="m-ptitle" style="color:var(--a1)">Source Code</span>
<span class="m-pbadge" style="color:var(--a1)">Compilation Phase</span>
</div>
<div class="m-code-body">
<div class="c-line"><span class="c-num">1</span><span><span class="fn">console</span>.log(myVar); <span class="cm">// ?</span></span></div>
<div class="c-line active"><span class="c-num">2</span><span><span class="kw">var</span> myVar = <span class="str">'Hello'</span>;</span></div>
<div class="c-line"><span class="c-num">3</span><span><span class="fn">console</span>.log(myVar); <span class="cm">// ?</span></span></div>
<div class="c-sep"></div>
<div class="c-line"><span class="c-num">5</span><span><span class="fn">console</span>.log(myLet); <span class="cm">// ?</span></span></div>
<div class="c-line"><span class="c-num">6</span><span><span class="kw">let</span> myLet = <span class="str">'World'</span>;</span></div>
<div class="c-line"><span class="c-num">7</span><span><span class="fn">console</span>.log(myLet); <span class="cm">// ?</span></span></div>
</div>
</div>
<!-- Memory -->
<div class="m-panel m-panel-mem">
<div class="m-panel-head">
<div class="m-pdot" style="background:var(--a2)"></div>
<span class="m-ptitle" style="color:var(--a2)">Memory State</span>
<span class="m-pbadge" style="color:var(--a2)">Global Scope</span>
</div>
<div class="m-mem-body">
<span class="mem-phase">Compilation</span>
<table class="mem-table">
<thead><tr><th>Identifier</th><th>Kind</th><th>Value</th></tr></thead>
<tbody>
<tr>
<td class="t-var">myVar</td>
<td><span class="m-tag" style="font-size:9px;padding:1px 6px;color:var(--warn);border-color:var(--warn)">var</span></td>
<td class="t-undef">undefined</td>
</tr>
</tbody>
</table>
</div>
</div>
<!-- Explain (in-col) -->
<div class="m-panel m-panel-explain">
<div class="m-panel-head">
<div class="m-pdot" style="background:var(--a3)"></div>
<span class="m-ptitle" style="color:var(--a3)">What's Happening</span>
</div>
<div class="m-explain-body">
<div class="ex-num">Step 2 of 7</div>
<div class="ex-title">var is Hoisted</div>
<div class="ex-body"><code>var myVar</code> is found on line 2 and hoisted. The declaration moves to the top of scope and is <strong>initialized to <code>undefined</code></strong>. This happens before line 1 runs.</div>
<div class="ex-tip">💡 var is both <em>declared</em> and <em>initialized</em> during compilation.</div>
</div>
</div>
</div><!-- m-panels -->
<!-- Explain ROW (own row) -->
<div class="m-panel m-panel-explain m-explain-row">
<div class="m-panel-head">
<div class="m-pdot" style="background:var(--a3)"></div>
<span class="m-ptitle" style="color:var(--a3)">What's Happening</span>
<span class="m-pbadge" style="color:var(--a3)">Step 2 of 7 — var is Hoisted</span>
</div>
<div class="m-explain-body">
<div class="ex-left">
<div class="ex-num">Step 2 of 7</div>
<div class="ex-title">var is Hoisted</div>
<div class="ex-body"><code>var myVar</code> is found on line 2 and hoisted. The declaration moves to the top of scope and is <strong>initialized to <code>undefined</code></strong>. This happens before line 1 runs.</div>
</div>
<div class="ex-right">
<div class="ex-tip">💡 <code>var</code> is both <em>declared</em> and <em>initialized</em> during compilation. That's what makes it unique — it's accessible anywhere in its scope, even before its line.</div>
</div>
</div>
</div>
<!-- Steps BOTTOM slot -->
<div class="m-steps m-steps-bottom">
<button class="s-btn">← Prev</button>
<div class="s-dots">
<div class="s-dot done"></div><div class="s-dot on"></div>
<div class="s-dot"></div><div class="s-dot"></div><div class="s-dot"></div><div class="s-dot"></div><div class="s-dot"></div>
</div>
<div class="s-counter"><b>Compilation</b> · 2 / 7</div>
<button class="s-btn">Next →</button>
<button class="s-btn s-btn-primary">⏵ Auto-play</button>
</div>
<!-- Console -->
<div class="m-console" id="m-console">
<div class="m-con-head"><div class="m-con-dot"></div>Console Output</div>
<div class="m-con-body">
<div class="m-con-line"><span class="m-con-prompt" style="color:var(--muted);font-style:italic">No output yet — code hasn't executed</span></div>
</div>
</div>
</div><!-- m-main -->
</div><!-- mock -->
</div><!-- preview -->
<div id="prompt-strip">
<span id="prompt-text"></span>
<button id="copy-btn" onclick="copyPrompt()">Copy Prompt</button>
</div>
</div>
<script>
const DEFAULTS = { steps:'bottom', explain:'col', font:'md', banner:'show', console:'show' };
const S = { ...DEFAULTS };
const PRESETS = [
{
id:'current', icon:'📐', label:'Current layout', desc:'Steps bottom · Explain in col · 14px',
s:{ steps:'bottom', explain:'col', font:'md', banner:'show', console:'show' },
},
{
id:'top-nav', icon:'⬆️', label:'Steps on top', desc:'Steps top · Explain in col · 14px',
s:{ steps:'top', explain:'col', font:'md', banner:'show', console:'show' },
},
{
id:'wide-row', icon:'↔️', label:'Wide explanation', desc:'Steps top · Explain full-width row · 14px',
s:{ steps:'top', explain:'row', font:'md', banner:'show', console:'show' },
},
{
id:'roomy', icon:'🔡', label:'Roomy + large', desc:'Steps top · Explain row · 15px font',
s:{ steps:'top', explain:'row', font:'lg', banner:'show', console:'show' },
},
{
id:'focused', icon:'🎯', label:'Focused', desc:'Steps top · Explain row · 16px · no banner',
s:{ steps:'top', explain:'row', font:'xl', banner:'hide', console:'hide' },
},
];
// Build presets
const pl = document.getElementById('presets');
PRESETS.forEach(p => {
const b = document.createElement('button');
b.className = 'preset-btn'; b.dataset.id = p.id;
b.innerHTML = `<span class="preset-icon">${p.icon}</span><div><div>${p.label}</div><div class="preset-desc">${p.desc}</div></div>`;
b.addEventListener('click', () => { Object.assign(S, p.s); renderAll(); });
pl.appendChild(b);
});
function mkToggle(id, opts, key) {
const el = document.getElementById(id);
opts.forEach(([lbl,val]) => {
const b = document.createElement('button');
b.className = 'toggle-btn'; b.textContent = lbl; b.dataset.val = val;
b.addEventListener('click', () => { S[key] = val; renderAll(); });
el.appendChild(b);
});
}
mkToggle('t-steps', [['Top','top'],['Bottom','bottom']], 'steps');
mkToggle('t-explain', [['3rd Col','col'],['Own Row','row']], 'explain');
mkToggle('t-font', [['Sm 13','sm'],['Md 14','md'],['Lg 15','lg'],['XL 16','xl']], 'font');
mkToggle('t-banner', [['Show','show'],['Hide','hide']], 'banner');
mkToggle('t-console', [['Show','show'],['Hide','hide']], 'console');
function renderAll() {
const mock = document.getElementById('mock');
mock.className = [
'steps-' + S.steps,
'explain-' + S.explain,
'fs-' + S.font,
'banner-' + S.banner,
'console-' + S.console,
].join(' ');
// Apply banner/console via direct style (CSS class-based show/hide)
document.getElementById('m-phase-banner').style.display = S.banner === 'show' ? '' : 'none';
document.getElementById('m-console').style.display = S.console === 'show' ? '' : 'none';
// Preset active state
document.querySelectorAll('.preset-btn').forEach(b => {
const p = PRESETS.find(x => x.id === b.dataset.id);
const match = p && Object.keys(p.s).every(k => p.s[k] === S[k]);
b.classList.toggle('on', match);
});
// Toggle buttons
[['t-steps','steps'],['t-explain','explain'],['t-font','font'],['t-banner','banner'],['t-console','console']].forEach(([id,key]) => {
document.getElementById(id).querySelectorAll('.toggle-btn').forEach(b => b.classList.toggle('on', b.dataset.val === S[key]));
});
updatePrompt();
}
function updatePrompt() {
const parts = [];
const fsSizes = { sm:'13px (small)', md:'14px (default)', lg:'15px (large)', xl:'16px (XL)' };
if (S.steps !== DEFAULTS.steps) parts.push('move step controls to the top of the visualization');
if (S.explain !== DEFAULTS.explain) parts.push('move the "What\'s Happening" panel into its own full-width row below the code and memory panels');
if (S.font !== DEFAULTS.font) parts.push(`increase base font size to ${fsSizes[S.font]}`);
if (S.banner !== DEFAULTS.banner) parts.push('remove the phase banner');
if (S.console !== DEFAULTS.console) parts.push('hide the console output panel');
document.getElementById('prompt-text').textContent = parts.length
? `Update the Hoisting visualizer layout to: ${parts.join('; ')}.`
: 'No layout changes from defaults — current layout looks good.';
}
function copyPrompt() {
navigator.clipboard.writeText(document.getElementById('prompt-text').textContent);
const btn = document.getElementById('copy-btn');
btn.textContent = 'Copied!'; btn.classList.add('copied');
setTimeout(() => { btn.textContent = 'Copy Prompt'; btn.classList.remove('copied'); }, 1800);
}
renderAll();
</script>
</body>
</html>