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<!doctype html> |
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<html lang="en"> |
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<head> |
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<meta charset="utf-8" /> |
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<meta http-equiv="X-UA-Compatible" content="IE=edge"/> |
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<meta name="viewport" content="width=device-width, initial-scale=1"/> |
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<title>NLLB Translation (WebGPU/WASM) + Progress</title> |
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<style> |
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body { font: 14px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif; margin: 16px; } |
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h1 { margin-top:0; } |
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label { display:block; margin: 8px 0 4px; } |
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textarea { width: 100%; min-height: 120px; } |
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select, input[type="submit"] { padding: 8px; font: inherit; } |
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#row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; } |
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#progress-wrap { margin: 10px 0; display:none; } |
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#footer { opacity:.7; margin-top:12px; font-size:12px; } |
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.muted { opacity:.8 } |
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.error { color:#b00 } |
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.ok { color:#0a0 } |
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</style> |
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</head> |
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<body> |
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<h1>NLLB translation in browser</h1> |
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<div id="row"> |
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<div> |
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<label for="src_lang">Source language</label> |
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<select id="src_lang"> |
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<option value="eng_Latn" selected>English (eng_Latn)</option> |
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<option value="spa_Latn">Spanish (spa_Latn)</option> |
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<option value="fra_Latn">French (fra_Latn)</option> |
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<option value="hin_Deva">Hindi (hin_Deva)</option> |
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</select> |
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</div> |
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<div> |
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<label for="tgt_lang">Target language</label> |
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<select id="tgt_lang"> |
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<option value="spa_Latn" selected>Spanish (spa_Latn)</option> |
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<option value="eng_Latn">English (eng_Latn)</option> |
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<option value="fra_Latn">French (fra_Latn)</option> |
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<option value="hin_Deva">Hindi (hin_Deva)</option> |
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</select> |
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</div> |
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</div> |
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<label for="from">Input text</label> |
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<textarea id="from" placeholder="Type text to translate"></textarea> |
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<div id="progress-wrap"> |
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<progress id="loadProgress" value="0" max="1" style="width:100%;"></progress> |
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<div id="progressText" class="muted">Initializing…</div> |
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</div> |
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<input type="submit" id="submit" value="Loading..." disabled /> |
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<label for="to" style="margin-top:12px">Output</label> |
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<textarea id="to" readonly>Output will be here...</textarea> |
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<div id="footer" class="muted"> |
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Tip: first load downloads the model; later loads are much faster thanks to browser cache. |
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</div> |
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<div id="libStatus" class="error"></div> |
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<script> |
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(function loadTransformersUMD() { |
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const tries = [ |
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"https://cdn.jsdelivr.net/npm/@xenova/transformers@3.0.0/dist/transformers.min.js", |
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"https://unpkg.com/@xenova/transformers@3.0.0/dist/transformers.min.js", |
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"https://huggingface.co/datasets/Xenova/transformers.js/resolve/main/3.0.0/transformers.min.js", |
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"./transformers.min.js" |
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]; |
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const statusEl = document.getElementById("libStatus"); |
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function tryNext(i) { |
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if (i >= tries.length) { |
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statusEl.textContent = "❌ Failed to load Transformers.js from all sources."; |
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return; |
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} |
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const src = tries[i]; |
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const s = document.createElement("script"); |
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s.src = src; |
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s.async = true; |
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s.onload = () => { |
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if (window.transformers) { |
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statusEl.className = "ok"; |
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statusEl.textContent = "✅ Transformers.js loaded from: " + src; |
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initApp(); |
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} else { |
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statusEl.textContent = "⚠️ Loaded but window.transformers missing: " + src; |
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tryNext(i + 1); |
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} |
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}; |
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s.onerror = () => { |
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statusEl.textContent = "⚠️ Failed: " + src + " — trying next…"; |
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tryNext(i + 1); |
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}; |
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document.head.appendChild(s); |
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} |
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tryNext(0); |
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function initApp() { |
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const btn = document.getElementById("submit"); |
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const out = document.getElementById("to"); |
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const fromEl = document.getElementById("from"); |
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const srcEl = document.getElementById("src_lang"); |
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const tgtEl = document.getElementById("tgt_lang"); |
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const wrap = document.getElementById("progress-wrap"); |
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const bar = document.getElementById("loadProgress"); |
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const txt = document.getElementById("progressText"); |
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btn.disabled = false; |
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btn.value = "Translate"; |
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const tf = window.transformers; |
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let translator = null; |
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function showProgressUI(show, message) { |
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wrap.style.display = show ? "" : "none"; |
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if (message) txt.textContent = message; |
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bar.value = 0; bar.max = 1; |
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} |
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function progressCallback(p) { |
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if (p.status) txt.textContent = p.status; |
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if (typeof p.loaded === "number" && typeof p.total === "number" && p.total > 0) { |
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bar.max = p.total; |
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bar.value = p.loaded; |
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const pct = Math.round((p.loaded / p.total) * 100); |
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txt.textContent = `Downloading ${p.file || "model"}… ${pct}%`; |
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} |
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} |
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async function getTranslator() { |
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if (translator) return translator; |
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showProgressUI(true, "Loading model…"); |
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try { |
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const { pipeline, env } = tf; |
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env.useBrowserCache = true; |
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env.allowLocalModels = false; |
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env.backends.onnx.wasm.numThreads = Math.max(4, Math.min(8, navigator.hardwareConcurrency || 4)); |
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translator = await pipeline("translation", "Xenova/nllb-200-distilled-600M", { |
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device: (navigator.gpu ? "webgpu" : "wasm"), |
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progress_callback: progressCallback |
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}); |
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txt.textContent = "✅ Model ready"; |
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bar.max = 1; bar.value = 1; |
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return translator; |
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} catch (e) { |
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console.error(e); |
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txt.textContent = "❌ Error loading model — see console."; |
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throw e; |
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} |
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} |
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btn.addEventListener("click", async () => { |
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const prev = btn.value; |
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btn.disabled = true; btn.value = "Working…"; |
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try { |
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const t = await getTranslator(); |
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const text = (fromEl.value || "").trim(); |
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if (!text) { out.value = "Please type some text."; return; } |
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const res = await t(text, { src_lang: srcEl.value, tgt_lang: tgtEl.value, max_length: 128 }); |
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out.value = res?.[0]?.translation_text || "(no output)"; |
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} catch (e) { |
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out.value = "❌ Translation failed. See console."; |
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} finally { |
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btn.disabled = false; btn.value = prev; |
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} |
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}); |
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} |
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})(); |
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</script> |
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</body> |
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</html> |
