document.getElementById('calorie-form').addEventListener('submit', function(e){ document.getElementById('results').style.display = 'none'; document.getElementById('loading').style.display = 'block'; setTimeout(calculateCalories, 2000); e.preventDefault(); }); function calculateCalories(e) { const age = document.getElementById('age'); const gender = document.querySelector('input[name="customRadioInline1"]:checked'); const weight = document.getElementById('weight'); const height = document.getElementById('height'); const activity = document.getElementById('list').value; const totalCalories = document.getElementById('total-calories'); if (age.value === '' || weight.value === '' || height.value === '' || 80 < age.value || age.value < 15) { errorMessage('Please make sure the values you entered are correct') } else if(gender.id === 'male' && activity === "1") { totalCalories.value = 1.2 * (66.5 + (13.75 * parseFloat(weight.value)) + (5.003 * parseFloat(height.value)) - (6.755 * parseFloat(age.value))); } else if(gender.id === 'male' && activity === "2") { totalCalories.value = 1.375 * (66.5 + (13.75 * parseFloat(weight.value)) + (5.003 * parseFloat(height.value)) - (6.755 * parseFloat(age.value))); } else if (gender.id === 'male' && activity === "3") { totalCalories.value = 1.55 * (66.5 + (13.75 * parseFloat(weight.value)) + (5.003 * parseFloat(height.value)) - (6.755 * parseFloat(age.value))); } else if(gender.id === 'male' && activity === "4") { totalCalories.value = 1.725 * (66.5 + (13.75 * parseFloat(weight.value)) + (5.003 * parseFloat(height.value)) - (6.755 * parseFloat(age.value))); } else if(gender.id === 'male' && activity === "5") { totalCalories.value = 1.9 * (66.5 + (13.75 * parseFloat(weight.value)) + (5.003 * parseFloat(height.value)) - (6.755 * parseFloat(age.value))) ; } else if(gender.id === 'female' && activity === "1") { totalCalories.value = 1.2 * (655 + (9.563 * parseFloat(weight.value)) + (1.850 * parseFloat(height.value)) - (4.676 * parseFloat(age.value))); } else if(gender.id === 'female' && activity === "2") { totalCalories.value = 1.375 * (655 + (9.563 * parseFloat(weight.value)) + (1.850 * parseFloat(height.value)) - (4.676 * parseFloat(age.value))); } else if(gender.id === 'female' && activity === "3") { totalCalories.value = 1.55 * (655 + (9.563 * parseFloat(weight.value)) + (1.850 * parseFloat(height.value)) - (4.676 * parseFloat(age.value))); } else if(gender.id === 'female' && activity === "4") { totalCalories.value = 1.725* (655 + (9.563 * parseFloat(weight.value)) + (1.850 * parseFloat(height.value)) - (4.676 * parseFloat(age.value))); } else { totalCalories.value = 1.9 * (655 + (9.563 * parseFloat(weight.value)) + (1.850 * parseFloat(height)) - (4.676 * parseFloat(age.value))); } document.getElementById('results').style.display = 'block'; document.getElementById('loading').style.display = 'none'; } function errorMessage(error) { document.getElementById('results').style.display = 'none'; document.getElementById('loading').style.display = 'none'; const errorDiv = document.createElement('div'); const card = document.querySelector('.card'); const heading = document.querySelector('.heading'); errorDiv.className = 'alert alert-danger'; errorDiv.appendChild(document.createTextNode(error)); card.insertBefore(errorDiv, heading); setTimeout(clearError, 4000); } function clearError() { document.querySelector('.alert').remove(); }
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