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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta
name="viewport"
content="width=device-width,initial-scale=1,viewport-fit=cover" />
<title>Qwen2.5‑Coder‑3B‑Instruct — WebGPU (ONNX)</title>
<meta name="color-scheme" content="dark light" />
<style>
:root{
--bg:#0b1021; --panel:#0e1430; --text:#e9eeff; --muted:#9fb3ff; --accent:#7aa2ff;
--ok:#2ecc71; --warn:#f39c12; --err:#e74c3c; --radius:14px; --border:1px solid rgba(255,255,255,.08)
}
*{box-sizing:border-box}
body{
margin:0;
background:
radial-gradient(1200px 800px at 10% -10%,#1a2252 0%,transparent 60%),
radial-gradient(1200px 800px at 110% 10%,#1b2d61 0%,transparent 60%),
var(--bg);
color:var(--text);
font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;
padding:20px
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header{display:flex;gap:16px;align-items:center;justify-content:space-between;padding:14px 16px;border-radius:var(--radius);background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));border:var(--border)}
h1{margin:0;font-size:22px}
.muted{color:var(--muted);font-size:12px}
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button.ghost{background:transparent;border:var(--border)}
#chat{display:flex;flex-direction:column;gap:8px;height:280px;overflow:auto;border-radius:12px;background:var(--panel);border:var(--border);padding:10px}
.msg{padding:10px;border-radius:10px;max-width:90%}
.me{background:#1b2553;align-self:flex-end}
.bot{background:#0b143f;align-self:flex-start}
#log{background:#060a1d;color:#b8d0ff;border:var(--border);border-radius:12px;height:140px;overflow:auto;padding:8px;font-size:12px}
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progress{width:220px;height:10px}
a.link{color:var(--accent);text-decoration:none}
a.link:hover{text-decoration:underline}
</style>
</head>
<body>
<header>
<div>
<h1>Qwen2.5‑Coder‑3B‑Instruct — WebGPU (ONNX)</h1>
<div class="muted">Pure front‑end · Transformers.js v3 + ONNX Runtime Web · WebGPU preferred</div>
</div>
<div class="row">
<button id="load">Load model</button>
<button id="cancel" class="secondary" style="display:none;">Cancel (UI reset only)</button>
<button id="clearlog" class="ghost">Clear log</button>
</div>
</header>
<div class="card">
<div class="row" style="margin-bottom:8px">
<span class="chip warn">First run will download ~2.1 GB (q4 ONNX weights). Desktop Chrome/Edge recommended. HTTPS or localhost required for WebGPU.</span>
</div>
<!-- Confirmation step -->
<div id="confirm" style="display:none">
<p>This will download model files (~2.1 GB, quantized q4) to your browser cache and run inference via WebGPU. Proceed?</p>
<div class="row">
<button id="confirm-yes">Yes, download now</button>
<button id="confirm-no" class="secondary">No, go back</button>
</div>
</div>
<!-- Loading / progress -->
<div id="loading" style="display:none">
<div class="row" style="align-items:center">
<progress id="progress" value="0" max="100"></progress>
<span id="progress-label" class="muted">0%</span>
</div>
<div class="muted">
WebGPU works on secure contexts (HTTPS/localhost). Safari/Firefox may need experimental flags; fallback is WASM/CPU.
</div>
</div>
<!-- Chat UI -->
<div id="ui" style="display:none">
<input id="sys" type="text" placeholder="System prompt (optional): You are a senior coding assistant. Keep answers concise." />
<div id="chat" aria-live="polite" aria-busy="false"></div>
<textarea id="prompt" placeholder="Ask something (you can paste code)…"></textarea>
<div class="row">
<button id="send">Send</button>
<button id="stop" class="ghost" disabled>Stop</button>
<span id="status" class="chip" style="display:none"></span>
</div>
</div>
</div>
<div class="card">
<h3 style="margin:6px 0">Examples</h3>
<div class="toggle"><input id="autorun" type="checkbox" checked/> <label for="autorun" class="muted">Auto‑run on click</label></div>
<div id="examples" class="examples"></div>
</div>
<div class="card">
<h3 style="margin:6px 0">Debug log</h3>
<div id="log" role="log" aria-live="polite"></div>
</div>
<script type="module">
// ================= Configuration =================
const MODEL_ID = 'onnx-community/Qwen2.5-Coder-3B-Instruct';
// 固定到 v3 稳定版（包含 TextStreamer / InterruptableStoppingCriteria / WebGPU 支持）
const TRANSFORMERS_CDN = 'https://cdn.jsdelivr.net/npm/@huggingface/transformers@3.0.0';
// Prefer WebGPU; gracefully fall back if unavailable
const device = ('gpu' in navigator) ? 'webgpu' : 'auto';
// Smallest first: q4 → q4f16 → int8 → fp16
const options = {
device, // prefer WebGPU; fallback to auto if not available
dtype: 'q4', // maps to onnx/model_q4.onnx + model_q4.onnx_data
progress_callback: setProgress,
};
// Example presets (rendered as buttons)
const EXAMPLES = [
{
title: 'Parse Apache logs (Python)',
sys: 'You are a senior coding assistant. Keep answers concise and show tested code.',
prompt: `Write a Python function parse_log(line: str) that parses Apache combined log format into a dict with keys ip, time, method, path, status, bytes, referrer, ua. Include robust regex, timezone handling, and 5 pytest unit tests.`
},
{
title: 'Refactor callbacks → async/await (JS)',
sys: 'You are a pragmatic JS refactoring assistant.',
prompt: `Refactor this Node.js callback code to async/await with proper error handling and backpressure using streams:
const fs = require('fs');
fs.readFile('in.txt', (e, d) => {
if (e) throw e;
fs.writeFile('out.txt', d.toString().toUpperCase(), err => {
if (err) throw err;
console.log('done');
});
});
Provide a short explanation.`
},
{
title: 'Cohort retention SQL (Postgres)',
sys: 'You are a data engineer.',
prompt: `Given events(user_id, event_time, event_name) with sign_up and active events, write a SQL that computes weekly user retention (cohorted by signup week) as a pivoted table. Assume UTC timestamps. Explain indexes briefly.`
},
{
title: 'Unit tests with pytest',
sys: 'You are a Python testing expert.',
prompt: `Generate pytest tests for a function normalize_phone(s: str) that returns E.164 format or raises ValueError. Cover edge cases and property tests with hypothesis.`
},
{
title: 'Explain code step by step',
sys: 'Be a clear explainer for junior developers.',
prompt: `Explain the following code step by step, then suggest two improvements for readability and performance:
from collections import defaultdict
def f(nums):
d = defaultdict(int)
for x in nums:
d[x] += 1
m = max(d.values())
return [k for k, v in d.items() if v == m]`
},
{
title: 'Regex with explanation',
sys: 'You write readable regex with comments.',
prompt: `Write a single regex that matches a valid IPv4 or IPv6 address. Provide a commented, multi-line version and a short, single-line version, plus examples of matches and non-matches.`
},
{
title: 'Document a Go function',
sys: 'You are a Go reviewer.',
prompt: `Write a Go doc comment and improve the signature for a function that merges two sorted slices of ints and returns a deduplicated sorted slice. Provide a fully working example.`
},
{
title: 'GitHub Actions CI',
sys: 'You are a DevOps assistant.',
prompt: `Create a GitHub Actions workflow (YAML) that runs Python tests on 3.11, caches pip, runs flake8 + pytest, and uploads coverage to Codecov with secrets.CODECOV_TOKEN.`
}
];
// ================= DOM & State =================
const $ = s=>document.querySelector(s);
const logDiv=$('#log'), chatDiv=$('#chat');
const loadBtn=$('#load'), cancelBtn=$('#cancel');
const clearBtn=$('#clearlog');
const ui=$('#ui'), loading=$('#loading');
const pbar=$('#progress'), plabel=$('#progress-label');
const sysEl=$('#sys'), promptEl=$('#prompt');
const sendBtn=$('#send'), stopBtn=$('#stop');
const statusChip=$('#status');
const confirmBox=$('#confirm');
const confirmYes=$('#confirm-yes');
const confirmNo=$('#confirm-no');
const exWrap=$('#examples');
const autoRun=$('#autorun');
let pipe=null;
let cancelled=false;
let stopping=null; // InterruptableStoppingCriteria
let currentStreamer=null; // TextStreamer
// ================= Utils =================
function log(...a){
const s = a.map(x => (typeof x === 'string' ? x : JSON.stringify(x))).join(' ');
logDiv.textContent += s + '\n'; // ✅ 修复：原代码这里是非法的跨行字符串
logDiv.scrollTop = logDiv.scrollHeight;
console.log('[LOG]', ...a);
}
function chip(kind,text){ statusChip.className='chip '+(kind||''); statusChip.textContent=text; statusChip.style.display='inline-flex'; }
function clearChip(){ statusChip.style.display='none'; }
function setProgress(evt){
if(evt?.status==='progress'){
const pct=Math.round(Math.max(0,Math.min(100,evt.progress||0)));
pbar.value=pct; plabel.textContent=`${pct}% ${evt?.name||evt?.file||''}`.trim();
} else if(evt?.status){
log(`status: ${evt.status} ${evt?.name||evt?.file||''}`);
}
}
window.addEventListener('error',e=>log('window.error:',e.message,e.filename,`${e.lineno}:${e.colno}`));
window.addEventListener('unhandledrejection',e=>log('unhandledrejection:',e.reason?.message||e.reason));
async function importTransformers(){
log('Importing library:',TRANSFORMERS_CDN);
return await import(TRANSFORMERS_CDN);
}
function renderExamples(){
exWrap.innerHTML='';
EXAMPLES.forEach((ex)=>{
const b=document.createElement('button');
b.textContent=ex.title; b.className='ghost';
b.addEventListener('click',()=>{
sysEl.value = ex.sys || '';
promptEl.value = ex.prompt || '';
if(autoRun.checked){ sendBtn.click(); }
});
exWrap.appendChild(b);
});
}
renderExamples();
// ================= Events =================
loadBtn.addEventListener('click', ()=>{
loadBtn.style.display='none';
confirmBox.style.display='block';
});
confirmNo.addEventListener('click', ()=>{
confirmBox.style.display='none';
loadBtn.style.display='inline-block';
});
confirmYes.addEventListener('click', async ()=>{
try{
cancelled=false; confirmBox.style.display='none';
cancelBtn.style.display='inline-block';
loading.style.display='block'; pbar.value=0; plabel.textContent='0%';
const { pipeline, TextStreamer, InterruptableStoppingCriteria } = await importTransformers();
if (device !== 'webgpu') {
log('WebGPU not detected; falling back to device=auto (WASM/CPU).');
chip('warn','WebGPU not detected — using auto');
} else {
log('WebGPU detected.');
}
log('Transformers.js loaded. Creating text-generation pipeline…');
pipe = await pipeline('text-generation', MODEL_ID, options);
stopping = new InterruptableStoppingCriteria();
// 暴露 streamer 构造器供 send 使用
window.__hf = { TextStreamer };
if(cancelled) log('Note: cancel only resets UI and cannot interrupt underlying downloads.');
loading.style.display='none'; cancelBtn.style.display='none'; ui.style.display='block';
chip('ok','Model ready'); setTimeout(clearChip,1200);
}catch(err){
loading.style.display='none'; cancelBtn.style.display='none'; loadBtn.style.display='inline-block';
log('❌ Load failed:', err?.message||err);
if((err?.message||'').includes('404')) log('Check repo ID or private permissions:', MODEL_ID);
log('Reminder: Transformers.js expects ONNX weights under an onnx/ directory with proper configs.');
}
});
cancelBtn.addEventListener('click',()=>{ cancelled=true; loadBtn.style.display='inline-block'; cancelBtn.style.display='none'; loading.style.display='none'; log('Canceled (UI only).'); });
clearBtn.addEventListener('click',()=>{ logDiv.textContent=''; });
function addMsg(text, me=false){
const d=document.createElement('div'); d.className='msg '+(me?'me':'bot'); d.textContent=text;
chatDiv.appendChild(d); chatDiv.scrollTop=chatDiv.scrollHeight; return d;
}
sendBtn.addEventListener('click', async ()=>{
try{
if(!pipe){ chip('warn','Model not loaded'); return; }
const user=promptEl.value.trim(); if(!user) return; promptEl.value='';
const sys=sysEl.value.trim();
addMsg(user,true);
const botEl=addMsg('…');
stopBtn.disabled=false; chip('', 'Generating…'); chatDiv.setAttribute('aria-busy','true');
// v3 推荐的“消息数组”（Chat 格式）
const messages = [];
if (sys) messages.push({ role: 'system', content: sys });
messages.push({ role: 'user', content: user });
const { TextStreamer } = window.__hf || {};
let outText = '';
currentStreamer = new TextStreamer(pipe.tokenizer, {
skip_prompt: true,
callback_function: (chunk) => { outText += chunk; botEl.textContent = outText; }
});
// 可中断
stopping?.reset?.();
const out = await pipe(messages, {
max_new_tokens: 256,
temperature: 0.7,
top_p: 0.9,
repetition_penalty: 1.05,
streamer: currentStreamer,
stopping_criteria: stopping
});
// 若未走流式，兜底一次性写入
if (!outText && Array.isArray(out) && out[0] && out[0].generated_text) {
botEl.textContent = (typeof out[0].generated_text === 'string')
? out[0].generated_text
: JSON.stringify(out[0].generated_text);
}
chip('ok','Done'); setTimeout(clearChip, 1200);
}catch(err){
log('❌ Generation error:', err?.message||err);
chip('err','Generation failed');
}finally{
stopBtn.disabled=true; currentStreamer=null; chatDiv.setAttribute('aria-busy','false');
}
});
// Stop：使用 InterruptableStoppingCriteria 即时终止生成
stopBtn.addEventListener('click',()=>{
try{
stopping?.interrupt?.();
chip('warn','Stopped'); setTimeout(clearChip,1200);
}catch{}
});
</script>
</body>
</html>
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