Add files via upload

scripts.js

@@ -1,3 +1,5 @@
+alert("An app developed independently by @simplyYan (Wesley Yan Soares Brehmer), under a CC0-1.0 license.")
+
 document.getElementById('userForm').addEventListener('submit', function(e) {
     e.preventDefault();
 
@@ -6,25 +8,33 @@ document.getElementById('userForm').addEventListener('submit', function(e) {
     const height = document.getElementById('height').value;
     const weight = document.getElementById('weight').value;
     const activityLevel = document.getElementById('activityLevel').value;
+    var result = calculateIdealWeight(height, weight);
 
-    const imc = calculateIMC(weight, height);
-    const idealWeightRange = calculateIdealWeight(height);
+    const imc = result.bmi;
+    const idealWeightRange = result.idealWeight;
+    const leanMass = calculateLeanMass(weight, imc);
+    const fatMass = calculateFatMass(weight, leanMass);
     const calories = calculateCalories(weight, height, age, activityLevel);
     const waterIntake = calculateWaterIntake(weight);
 
-    displayResults(name, imc, idealWeightRange, calories, waterIntake);
+    displayResults(name, imc, idealWeightRange, calories, waterIntake, leanMass, fatMass);
 });
 
 function calculateIMC(weight, height) {
     const heightInMeters = height / 100;
     return (weight / (heightInMeters * heightInMeters)).toFixed(2);
 }
 
-function calculateIdealWeight(height) {
-    const heightInMeters = height / 100;
-    const minWeight = 18.5 * (heightInMeters * heightInMeters);
-    const maxWeight = 24.9 * (heightInMeters * heightInMeters);
-    return [minWeight.toFixed(2), maxWeight.toFixed(2)];
+function calculateIdealWeight(height, weight) {
+    height = height / 100; 
+    var bmi = weight / Math.pow(height, 2);
+    var minIdealWeight = 18.5 * Math.pow(height, 2);
+    var maxIdealWeight = 24.9 * Math.pow(height, 2);
+
+    return { 
+        bmi: bmi.toFixed(2),
+        idealWeight: [minIdealWeight.toFixed(2), maxIdealWeight.toFixed(2)]
+    };
 }
 
 function calculateCalories(weight, height, age, activityLevel) {
@@ -36,13 +46,23 @@ function calculateWaterIntake(weight) {
     return (weight * 0.035).toFixed(2);
 }
 
-function displayResults(name, imc, idealWeightRange, calories, waterIntake) {
+function calculateLeanMass(weight, imc) {
+    return (weight * (1 - (imc / 100))).toFixed(2);
+}
+
+function calculateFatMass(weight, leanMass) {
+    return (weight - leanMass).toFixed(2);
+}
+
+function displayResults(name, imc, idealWeightRange, calories, waterIntake, leanMass, fatMass) {
     const resultsDiv = document.getElementById('results');
     resultsDiv.innerHTML = `
         <h2>Results for ${name}</h2>
         <p><strong>BMI:</strong> ${imc}</p>
         <p><strong>Ideal weight:</strong> ${idealWeightRange[0]} kg - ${idealWeightRange[1]} kg</p>
         <p><strong>Daily Calories:</strong> ${calories} kcal</p>
         <p><strong>Daily Water Intake:</strong> ${waterIntake} liters</p>
+        <p><strong>Lean Mass:</strong> ${leanMass} kg</p>
+        <p><strong>Fat Mass:</strong> ${fatMass} kg</p>
     `;
 }