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{% extends "base.html" %}
{% block title %}Zero-shot Classification - NLP Ultimate Tutorial{% endblock %}
{% block content %}
<div class="container">
<!-- Header Section -->
<div class="row mb-4">
<div class="col-12">
<div class="card">
<div class="card-header">
<h1 class="mb-0">
<i class="fas fa-tags"></i>
Zero-shot Classification
</h1>
</div>
<div class="card-body">
<p class="lead">Classify text into arbitrary categories without training on specific examples.</p>
<div class="alert alert-info">
<i class="fas fa-info-circle"></i>
<strong>About:</strong> Zero-shot classification can categorize text into arbitrary classes without having been specifically trained on those categories.
</div>
</div>
</div>
</div>
</div>
{% include "_analysis_nav.html" %}
<!-- Input Section -->
<div class="row mb-4">
<div class="col-12">
<div class="card">
<div class="card-header">
<h3 class="mb-0">
<i class="fas fa-keyboard"></i>
Enter text to classify:
</h3>
</div>
<div class="card-body">
<div class="row mb-3">
<div class="col-md-8">
<textarea id="textInput" class="form-control" rows="6" placeholder="Enter text here...">I absolutely love this new product! It's amazing and works perfectly.</textarea>
</div>
<div class="col-md-4">
<label for="sampleSelect" class="form-label">Or choose a sample:</label>
<select id="sampleSelect" class="form-select">
<option value="Custom">Custom</option>
<option value="Sentiment">Sentiment</option>
<option value="Emotion">Emotion</option>
<option value="Writing Style">Writing Style</option>
<option value="Intent">Intent</option>
</select>
</div>
</div>
<div class="d-flex justify-content-between align-items-center">
<div>
<button id="processBtn" class="btn btn-primary btn-lg">
<i class="fas fa-tags"></i>
Classify Text
</button>
</div>
<div>
<button id="clearBtn" class="btn btn-outline-secondary">
<i class="fas fa-trash"></i>
Clear
</button>
</div>
</div>
</div>
</div>
</div>
</div>
<!-- Classification Settings Section -->
<div class="row mb-4">
<div class="col-12">
<div class="card">
<div class="card-header">
<h3 class="mb-0">
<i class="fas fa-cog"></i>
Classification Settings
</h3>
</div>
<div class="card-body">
<div class="row">
<div class="col-md-6">
<label for="scenario" class="form-label">Classification Scenario</label>
<select id="scenario" class="form-select">
<option value="Sentiment" selected>Sentiment</option>
<option value="Emotion">Emotion</option>
<option value="Writing Style">Writing Style</option>
<option value="Intent">Intent</option>
<option value="Content Type">Content Type</option>
<option value="Audience Level">Audience Level</option>
<option value="Custom">Custom</option>
</select>
</div>
<div class="col-md-6">
<div class="form-check form-switch mt-4">
<input class="form-check-input" type="checkbox" id="multiLabel">
<label class="form-check-label" for="multiLabel">
Multi-label classification
</label>
<small class="form-text text-muted">Allow multiple categories</small>
</div>
</div>
</div>
<!-- Custom labels input (hidden by default) -->
<div id="customLabelsDiv" class="mt-3" style="display: none;">
<label for="customLabels" class="form-label">Custom Categories (one per line)</label>
<textarea id="customLabels" class="form-control" rows="4" placeholder="Enter custom categories here..."></textarea>
</div>
</div>
</div>
</div>
</div>
<!-- Model Info Section -->
<div class="row mb-4">
<div class="col-12">
<div class="card">
<div class="card-header">
<h3 class="mb-0">
<i class="fas fa-info-circle"></i>
Model Information
</h3>
</div>
<div class="card-body">
<div class="row">
<div class="col-md-4">
<div class="card h-100">
<div class="card-body text-center">
<i class="fas fa-brain fa-2x text-primary mb-2"></i>
<h5>BART-large-mnli</h5>
<p class="small">BART model fine-tuned on MultiNLI dataset</p>
<ul class="list-unstyled small text-start">
<li>• Zero-shot classification</li>
<li>• Arbitrary categories</li>
<li>• High accuracy</li>
</ul>
</div>
</div>
</div>
<div class="col-md-4">
<div class="card h-100">
<div class="card-body text-center">
<i class="fas fa-sliders-h fa-2x text-success mb-2"></i>
<h5>Flexible Classification</h5>
<p class="small">Classify into any user-defined categories</p>
<ul class="list-unstyled small text-start">
<li>• Pre-defined scenarios</li>
<li>• Custom categories</li>
<li>• Multi-label support</li>
</ul>
</div>
</div>
</div>
<div class="col-md-4">
<div class="card h-100">
<div class="card-body text-center">
<i class="fas fa-chart-bar fa-2x text-info mb-2"></i>
<h5>Confidence Scoring</h5>
<p class="small">Detailed confidence scores for each category</p>
<ul class="list-unstyled small text-start">
<li>• Confidence visualization</li>
<li>• Ranking by score</li>
<li>• Multiple category detection</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<!-- Example Texts Section -->
<div class="row mb-4">
<div class="col-12">
<div class="card">
<div class="card-header">
<h3 class="mb-0">
<i class="fas fa-list"></i>
Example Texts
</h3>
</div>
<div class="card-body">
<div class="row">
<div class="col-md-6">
<button class="btn btn-outline-primary w-100 mb-2" onclick="setExample('I absolutely love this new product! It\'s amazing and works perfectly.', 'Sentiment')">
I absolutely love this new product! It's amazing and works perfectly.
</button>
</div>
<div class="col-md-6">
<button class="btn btn-outline-primary w-100 mb-2" onclick="setExample('I am so excited about this opportunity!', 'Emotion')">
I am so excited about this opportunity!
</button>
</div>
<div class="col-md-6">
<button class="btn btn-outline-primary w-100 mb-2" onclick="setExample('The implementation requires careful consideration of the underlying architecture.', 'Writing Style')">
The implementation requires careful consideration of the underlying architecture.
</button>
</div>
<div class="col-md-6">
<button class="btn btn-outline-primary w-100 mb-2" onclick="setExample('You should definitely buy this product because it will solve all your problems.', 'Intent')">
You should definitely buy this product because it will solve all your problems.
</button>
</div>
</div>
</div>
</div>
</div>
</div>
<!-- Results Section -->
<div class="row">
<div class="col-12">
<div class="card">
<div class="card-header">
<h3 class="mb-0">
<i class="fas fa-chart-bar"></i>
Classification Results
</h3>
</div>
<div class="card-body">
<div id="resultsContainer">
<div class="text-center text-muted py-5">
<i class="fas fa-arrow-up fa-2x mb-3"></i>
<p>Click "Classify Text" to see classification results</p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
{% endblock %}
{% block extra_scripts %}
<script>
// Initialize page
document.addEventListener('DOMContentLoaded', function() {
// Only carry over when using Quick Nav; otherwise leave defaults
const shouldCarry = sessionStorage.getItem('carryTextOnNextPage') === '1';
if (shouldCarry) {
const storedText = sessionStorage.getItem('analysisText');
if (storedText) document.getElementById('textInput').value = storedText;
sessionStorage.removeItem('carryTextOnNextPage');
}
// Scenario change handler
document.getElementById('scenario').addEventListener('change', function() {
const customLabelsDiv = document.getElementById('customLabelsDiv');
if (this.value === 'Custom') {
customLabelsDiv.style.display = 'block';
} else {
customLabelsDiv.style.display = 'none';
}
// Update multi-label checkbox based on scenario
const multiLabelCheckbox = document.getElementById('multiLabel');
if (['Emotion', 'Intent', 'Content Type'].includes(this.value)) {
multiLabelCheckbox.checked = true;
}
});
// Sample text dropdown handler
document.getElementById('sampleSelect').addEventListener('change', function() {
const sampleType = this.value;
const textInput = document.getElementById('textInput');
const scenario = document.getElementById('scenario');
if (sampleType === 'Custom') {
textInput.value = '';
} else {
// Set sample prompts based on type
const samples = {
'Sentiment': 'I absolutely love this new product! It\'s amazing and works perfectly.',
'Emotion': 'I am so excited about this opportunity!',
'Writing Style': 'The implementation requires careful consideration of the underlying architecture.',
'Intent': 'You should definitely buy this product because it will solve all your problems.'
};
if (samples[sampleType]) {
textInput.value = samples[sampleType];
scenario.value = sampleType;
}
}
});
// Process button handler
document.getElementById('processBtn').addEventListener('click', function() {
const text = document.getElementById('textInput').value.trim();
if (!text) {
alert('Please enter text to classify.');
return;
}
// Show loading state
this.innerHTML = '<i class="fas fa-spinner fa-spin"></i> Classifying...';
this.disabled = true;
// Process classification
processClassification();
// Reset button after a delay
setTimeout(() => {
this.innerHTML = '<i class="fas fa-tags"></i> Classify Text';
this.disabled = false;
}, 2000);
});
// Clear button handler
document.getElementById('clearBtn').addEventListener('click', function() {
document.getElementById('textInput').value = '';
document.getElementById('resultsContainer').innerHTML = `
<div class="text-center text-muted py-5">
<i class="fas fa-arrow-up fa-2x mb-3"></i>
<p>Click "Classify Text" to see classification results</p>
</div>
`;
});
// Keyboard shortcuts
document.addEventListener('keydown', function(e) {
// Ctrl+Enter to process
if (e.ctrlKey && e.key === 'Enter') {
document.getElementById('processBtn').click();
}
// Ctrl+L to clear
if (e.ctrlKey && e.key === 'l') {
e.preventDefault();
document.getElementById('clearBtn').click();
}
});
});
// Set example text and scenario
function setExample(text, scenario) {
document.getElementById('textInput').value = text;
document.getElementById('scenario').value = scenario;
// Update custom labels visibility
const customLabelsDiv = document.getElementById('customLabelsDiv');
if (scenario === 'Custom') {
customLabelsDiv.style.display = 'block';
} else {
customLabelsDiv.style.display = 'none';
}
}
// Process classification
function processClassification() {
const text = document.getElementById('textInput').value.trim();
const scenario = document.getElementById('scenario').value;
const multiLabel = document.getElementById('multiLabel').checked;
const customLabels = document.getElementById('customLabels').value;
if (!text) {
alert('Please enter text to classify.');
return;
}
showLoading('resultsContainer');
fetch('/api/classification', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
text: text,
scenario: scenario,
multi_label: multiLabel,
custom_labels: customLabels
})
})
.then(response => response.json())
.then(data => {
if (data.success) {
displayResults(data.result);
} else {
showError(data.error || 'An error occurred while classifying text');
}
})
.catch(error => {
showError('Failed to classify text: ' + error.message);
})
.finally(() => {
hideLoading('resultsContainer');
});
}
// Show loading state
function showLoading(elementId) {
const element = document.getElementById(elementId);
if (element) {
element.innerHTML = `
<div class="text-center py-4">
<div class="spinner-border text-primary" role="status">
<span class="visually-hidden">Loading...</span>
</div>
<p class="mt-2">Classifying text...</p>
</div>
`;
}
}
// Hide loading state
function hideLoading(elementId) {
const element = document.getElementById(elementId);
if (element && element.innerHTML.includes('spinner-border')) {
element.innerHTML = '';
}
}
// Show error message
function showError(message, elementId = 'resultsContainer') {
const element = document.getElementById(elementId);
if (element) {
element.innerHTML = `
<div class="alert alert-danger fade-in">
<i class="fas fa-exclamation-triangle"></i>
<strong>Error:</strong> ${message}
</div>
`;
}
}
// Display results
function displayResults(result) {
const container = document.getElementById('resultsContainer');
if (container) {
container.innerHTML = result;
container.classList.add('fade-in');
// Scroll to results
container.scrollIntoView({ behavior: 'smooth', block: 'start' });
}
}
</script>
{% endblock %}
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