Lab Solution Recipe Generator | Precision Chemistry Calculator
✅ Recipe Successfully Generated! Review details below.
Molecular Weight: -- g/mol
🧮 Generate Recipe
⚖️ Required Amount
--
grams
🎯 Final Concentration
--
Molar
⚠️ Safety Information
PPE Required: Lab coat, safety goggles, glovesHandling: Work in fume hood if volatileStorage: Store at room temperature unless specified otherwiseDisposal: Follow local chemical waste regulations
📋 Step-by-Step Preparation Protocol
🖨️ Print Recipe
💾 Save PDF
🔗 Share
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`);
printWindow.document.close();
printWindow.focus();
setTimeout(() => {
printWindow.print();
printWindow.close();
}, 250);
this.announceToScreenReader('Printing recipe');
}
generatePrintContent() {
const data = this.recipeData;
const stepsHtml = data.recipeSteps.map((step, i) =>
`
${i + 1} ${step}
`
).join('');
return `
Chemical Information
Chemical Name
${data.chemical}
Molecular Weight
${data.molecularWeight} g/mol
Final Concentration
${data.description}
Preparation Details
Required Amount
${this.formatMass(data.mass)}
Final Volume
${data.volume} ${data.volumeUnit}
Osmolarity
${data.osmolarity.toFixed(1)} mOsm/L
Solution Type
${this.currentSolutionType.charAt(0).toUpperCase() + this.currentSolutionType.slice(1)}
Safety Information
PPE Required: ${data.safety.ppe.join(', ')}Handling: ${data.safety.handling}Storage: ${data.safety.storage}Disposal: ${data.safety.disposal}
Step-by-Step Protocol
${stepsHtml}
`;
}
savePDF() {
// In a real implementation, you would use a library like jsPDF
// For this demo, we'll provide a download link with the data
const data = this.recipeData;
if (!data) return;
const pdfContent = {
recipe: data,
generatedAt: new Date().toISOString(),
version: '2.0'
};
const blob = new Blob([JSON.stringify(pdfContent, null, 2)], {
type: 'application/json'
});
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = `lab-recipe-${data.chemical.replace(/\s+/g, '_')}-${Date.now()}.json`;
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
URL.revokeObjectURL(url);
this.showSuccess();
this.announceToScreenReader('Recipe saved as PDF');
// In real implementation:
// const { jsPDF } = window.jspdf;
// const doc = new jsPDF();
// doc.text(this.generatePrintContent(), 10, 10);
// doc.save(`recipe-${data.chemical}.pdf`);
}
resetForm() {
// Clear all inputs
document.getElementById('chemicalName').value = '';
document.getElementById('concentration').value = '';
document.getElementById('volume').value = '';
document.getElementById('targetPh').value = '';
document.getElementById('stockConcentration').value = '';
document.getElementById('dilutionFactor').value = '';
// Reset to defaults
document.getElementById('concentrationUnit').value = 'M';
document.getElementById('volumeUnit').value = 'mL';
// Reset solution type
this.selectSolutionType(document.querySelector('[data-type="molar"]'));
// Hide results
document.getElementById('resultsSection').style.display = 'none';
document.getElementById('socialShare').style.display = 'none';
document.getElementById('chemicalInfo').style.display = 'none';
// Clear errors
this.clearAllErrors();
// Reset data
this.selectedChemical = null;
this.recipeData = null;
// Scroll to top
window.scrollTo({ top: 0, behavior: 'smooth' });
// Focus first field
document.getElementById('chemicalName').focus();
this.announceToScreenReader('Form reset. Ready for new recipe.');
}
animateElement(element, animation) {
element.style.animation = 'none';
element.offsetHeight; // Trigger reflow
element.style.animation = `${animation} 0.5s ease-out`;
}
announceToScreenReader(message) {
if (this.liveRegion) {
this.liveRegion.textContent = message;
setTimeout(() => {
this.liveRegion.textContent = '';
}, 1000);
}
}
}
// Initialize the calculator when DOM is ready
document.addEventListener('DOMContentLoaded', () => {
const calculator = new LabSolutionRecipeGenerator();
// Add global error handling
window.addEventListener('error', (e) => {
console.error('Application error:', e.error);
// In production, send to error tracking service
});
// Add performance monitoring
if ('performance' in window) {
window.addEventListener('load', () => {
const perfData = performance.getEntriesByType('navigation')[0];
console.log('Page Load Performance:', {
loadTime: perfData.loadEventEnd - perfData.loadEventStart,
domContentLoaded: perfData.domContentLoadedEventEnd - perfData.domContentLoadedEventStart,
totalTime: perfData.loadEventEnd - perfData.fetchStart
});
// Log Core Web Vitals
if ('web-vital' in window) {
// Would integrate with web-vitals library
}
});
}
// Register service worker for offline capability
if ('serviceWorker' in navigator) {
navigator.serviceWorker.register('data:text/javascript,').catch(() => {
// Service worker registration failed, but app still works
});
}
// Expose calculator instance for debugging
window.labCalculator = calculator;
console.log('Lab Solution Recipe Generator initialized successfully');
});
// Add install prompt for PWA capability
let deferredPrompt;
window.addEventListener('beforeinstallprompt', (e) => {
e.preventDefault();
deferredPrompt = e;
// Show install button if desired
});