Weight Watchers Points Calculator (Old Program)
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Weight Watchers Points Calculator (Old Program)
Calculate your legacy Weight Watchers (WW) Points with our easy-to-use tool. Understand the original system's focus on calories, fat, and fiber.
Your Calculated WW Points
—
WW Points Breakdown
| Nutrient |
Value (per serving) |
Contribution to Points |
| Fat (g) |
— |
— |
| Carbohydrates (g) |
— |
— |
| Fiber (g) |
— |
— |
| Protein (g) |
— |
— |
Points Trend Over Time
Visualizing how points change with variations in key nutrients.
What is the Weight Watchers Points Calculator (Old Program)?
The Weight Watchers Points Calculator (Old Program) is a tool designed to help individuals estimate the "Points" value of food items based on the original Weight Watchers (WW) system. This system, often referred to as "PointsPlus" or earlier iterations, assigned a numerical value to foods based on their nutritional content, primarily focusing on calories, fat, and fiber. The goal was to encourage members to choose foods that were more nutrient-dense and lower in less healthy components. Understanding this old program is crucial for those who followed WW in the past or are curious about its historical approach to weight management. It helps users make informed food choices by quantifying the "cost" of different foods in terms of their nutritional impact.
Who should use it?
- Individuals who previously followed the older Weight Watchers programs and want to recall or recalculate points for familiar foods.
- People interested in understanding the historical evolution of WW's nutritional guidance.
- Anyone looking for a simple way to assess food choices based on a combination of calories, fat, and fiber.
- Nutrition enthusiasts curious about different weight management methodologies.
Common Misconceptions:
- It's the current WW system: The old Points system is significantly different from current WW programs (like "myWW" or "WW Freestyle") which often incorporate zero-point foods and different calculation formulas.
- Points are always accurate: This calculator provides an estimate based on a specific formula. Actual WW points assigned by the official program might vary slightly due to rounding, specific program rules, or proprietary algorithms.
- Points are the only factor: While helpful, focusing solely on points without considering overall dietary balance and individual nutritional needs might not be optimal for long-term health.
Weight Watchers Points Calculator (Old Program) Formula and Mathematical Explanation
The calculation for the old Weight Watchers Points system is based on a formula that assigns value to different macronutrients. While the exact formula has evolved over the years with different WW programs, a commonly understood version of the older "Points" system (often preceding "PointsPlus") is as follows:
Core Formula:
Points = (Fat grams * 4) + (Carbohydrates grams * 1) - (Fiber grams * 1) + (Protein grams * 1)
Let's break down the variables and their contribution:
- Fat (grams): Fat is given the highest multiplier (4) because it is calorie-dense and often associated with less healthy food choices in excess.
- Carbohydrates (grams): Carbohydrates are assigned a multiplier of 1.
- Fiber (grams): Fiber is subtracted (multiplier of -1). This is a key feature of the older WW system, rewarding foods with higher fiber content, as fiber can aid digestion and satiety.
- Protein (grams): Protein is added (multiplier of 1). Protein also contributes to satiety and is essential for muscle maintenance.
Important Note on Variations: It's crucial to remember that Weight Watchers has updated its programs multiple times. For instance, the "PointsPlus" system (introduced around 2010) had a different formula: PointsPlus = (Fat grams * 3) + (Carbs grams * 1) + (Sugar grams * 1) + (Protein grams * 1). Later, "SmartPoints" and "Freestyle" introduced further changes, including zero-point foods. This calculator specifically aims to replicate a common interpretation of the *earlier* "Points" system, often characterized by the inclusion of protein and subtraction of fiber.
Variables Table
| Variable |
Meaning |
Unit |
Typical Range (per serving) |
| Fat |
Total grams of fat in a serving |
grams (g) |
0 – 50+ g |
| Carbohydrates |
Total grams of digestible carbohydrates in a serving |
grams (g) |
0 – 100+ g |
| Fiber |
Total grams of dietary fiber in a serving |
grams (g) |
0 – 20+ g |
| Protein |
Total grams of protein in a serving |
grams (g) |
0 – 70+ g |
| Points |
Calculated value based on the WW formula |
Points |
0 – 50+ Points |
Practical Examples (Real-World Use Cases)
Let's see how the old WW Points calculator works with some common food examples:
Example 1: A Small Serving of Trail Mix
Scenario: You're having a small handful of trail mix as a snack.
- Inputs:
- Calories: 250
- Fat: 15g
- Carbohydrates: 25g
- Fiber: 3g
- Protein: 5g
- Calculation:
- Fat Contribution: 15g * 4 = 60
- Carb Contribution: 25g * 1 = 25
- Fiber Deduction: 3g * 1 = 3
- Protein Contribution: 5g * 1 = 5
- Total Points = 60 + 25 – 3 + 5 = 87 Points
- Interpretation: This trail mix, while containing some protein and fiber, is quite high in fat and calories, resulting in a high point value. This suggests it should be consumed in moderation within a daily points budget.
Example 2: A Lean Chicken Breast Salad (No Dressing)
Scenario: A lunch salad with grilled chicken breast and mixed greens.
- Inputs:
- Calories: 180
- Fat: 4g
- Carbohydrates: 10g
- Fiber: 4g
- Protein: 25g
- Calculation:
- Fat Contribution: 4g * 4 = 16
- Carb Contribution: 10g * 1 = 10
- Fiber Deduction: 4g * 1 = 4
- Protein Contribution: 25g * 1 = 25
- Total Points = 16 + 10 – 4 + 25 = 47 Points
- Interpretation: The salad is relatively low in fat and high in protein and fiber, leading to a moderate point value. The high protein and fiber help offset the points from fat and carbs. This aligns with WW's goal of promoting satiating, nutrient-rich meals.
How to Use This Weight Watchers Points Calculator (Old Program)
Using this calculator is straightforward. Follow these steps to get your estimated WW Points:
- Gather Nutritional Information: Find the nutritional facts for the food item you want to calculate. Look for serving size, calories, total fat (in grams), total carbohydrates (in grams), dietary fiber (in grams), and protein (in grams). You can usually find this on the food packaging or by searching online databases.
- Enter Values: Input the nutritional information into the corresponding fields on the calculator: "Calories," "Fat (grams)," "Carbohydrates (grams)," "Fiber (grams)," and "Protein (grams)." Ensure you are entering values per serving as listed on the nutrition label.
- Calculate: Click the "Calculate Points" button.
- Review Results: The calculator will display:
- Primary Result: The total estimated WW Points for the serving.
- Intermediate Values: A breakdown showing the points contributed by fat, carbs, fiber, and protein.
- Table: A summary table detailing the nutrient values and their point contributions.
- Chart: A visual representation of how different nutrient variations might affect the points.
- Understand the Formula: Read the "Formula Used" section to understand how the points were calculated. Remember this reflects an older WW Points system.
- Use the Buttons:
- Reset: Click "Reset" to clear all fields and return them to default values.
- Copy Results: Click "Copy Results" to copy the main point value, intermediate values, and key assumptions to your clipboard for easy sharing or note-taking.
Decision-Making Guidance: Use the calculated points to compare different food options. Foods with lower point values, especially those rich in protein and fiber relative to fat and simple carbs, are generally encouraged by the WW philosophy. This tool helps you make more informed choices aligned with the principles of the older WW program.
Key Factors That Affect Weight Watchers Points Results (Old Program)
Several factors influence the points calculated by the old WW system. Understanding these can help you make better food choices:
- Fat Content: This is the most heavily weighted factor. Higher fat grams significantly increase the point value due to fat's high calorie density and its impact on satiety and health. Choosing lean proteins and low-fat dairy is key.
- Fiber Content: Fiber acts as a "discount" in the old points formula. Foods high in fiber (like whole grains, fruits, vegetables) have their point values reduced, making them more favorable choices. This encourages consumption of fiber-rich, whole foods.
- Protein Content: Protein adds points but is also crucial for satiety and muscle maintenance. The old system balanced this by giving protein a positive point value, acknowledging its importance in a healthy diet while still emphasizing other factors.
- Carbohydrate Type (Implicit): While the formula uses total carbohydrates, the *type* of carbohydrate matters implicitly. The system rewards fiber (which is a carb) by subtracting points, indirectly favoring complex carbohydrates over simple sugars. However, the older formula didn't directly penalize sugar as much as later versions did.
- Serving Size: The points are calculated *per serving*. Consuming multiple servings will multiply the point value. Always be mindful of the serving size listed on the nutrition label and adjust your consumption accordingly.
- Processing Level: Highly processed foods often contain added fats, sugars, and refined carbohydrates, leading to higher point values. Whole, unprocessed foods tend to have better nutrient profiles (more fiber, protein, less unhealthy fat) and thus lower points.
- Calorie Density: Although not directly in the primary formula used here, calories are often correlated with fat and carbs. Foods high in calories relative to their volume (like fried items or sweets) will typically have higher fat and carb counts, thus higher points.
Frequently Asked Questions (FAQ)
Q1: Is this calculator using the latest Weight Watchers program?
A: No, this calculator is specifically designed for an *older* Weight Watchers Points system. Current WW programs (like myWW, Freestyle, etc.) use different formulas and may include zero-point foods that are not accounted for here.
Q2: Why does the formula subtract fiber?
A: In older WW systems, fiber was subtracted to reward foods that contained it. Fiber aids digestion, promotes fullness, and is a marker of healthier, less processed foods. This encouraged members to choose options like whole grains and vegetables.
Q3: How accurate are the calculated points?
A: This calculator provides an estimate based on a common interpretation of the old WW Points formula. Official WW points might differ slightly due to rounding rules, specific program nuances, or proprietary adjustments not captured by this simplified formula.
Q4: What if a food has zero fat or zero fiber?
A: If a nutrient value is zero, simply enter '0' into the corresponding field. The formula will adjust accordingly. For example, zero fiber means no points will be subtracted for fiber.
Q5: Can I use this for drinks?
A: Yes, if you have the nutritional information (fat, carbs, fiber, protein) per serving for a drink, you can use this calculator. Be mindful that many sugary drinks can have high point values.
Q6: What's the difference between this and the PointsPlus calculator?
A: The older "Points" formula often used multipliers like Fat*4, Carbs*1, Fiber*-1, Protein*1. The "PointsPlus" formula typically used Fat*3, Carbs*1, Sugar*1, Protein*1, and did not subtract fiber. This calculator uses the former structure.
Q7: How do I handle foods with missing nutritional information?
A: For accurate results, try to find complete nutritional data. If unavailable, you might have to estimate or use a similar food item's data as a proxy, but be aware this will affect accuracy.
Q8: Should I focus only on points for weight loss?
A: While points can be a useful guide, a balanced approach to weight loss also involves overall nutrition, portion control, mindful eating, and physical activity. This calculator is a tool to aid decision-making within the context of the old WW program.
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function calculatePoints() {
var isValid = true;
isValid = validateInput('calories', 'caloriesError') && isValid;
isValid = validateInput('fatGrams', 'fatGramsError') && isValid;
isValid = validateInput('fiberGrams', 'fiberGramsError') && isValid;
isValid = validateInput('sugarGrams', 'sugarGramsError') && isValid; // Added sugar for potential future use or alternative formulas
isValid = validateInput('proteinGrams', 'proteinGramsError') && isValid;
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var fatGrams = parseFloat(document.getElementById('fatGrams').value);
var fiberGrams = parseFloat(document.getElementById('fiberGrams').value);
var proteinGrams = parseFloat(document.getElementById('proteinGrams').value);
// Using a common interpretation of the older WW Points formula
// Points = (Fat grams * 4) + (Carbs grams * 1) – (Fiber grams * 1) + (Protein grams * 1)
// Note: This formula doesn't explicitly use calories or sugar, but they are often correlated.
// We'll use carbs for the calculation as per the formula structure.
var carbGrams = parseFloat(document.getElementById('calories').value) / 4; // Approximate carbs from calories if not directly provided, assuming ~4 kcal/g for carbs. This is a simplification. A better approach would be a direct carb input. Let's adjust to use a direct carb input if available, or stick to the formula's variables.
// Re-evaluating: The prompt implies a direct formula. Let's assume the user *meant* to provide carbs or that the formula is simplified.
// Given the prompt's structure, it's more likely the formula provided in the text is the one to follow, and the inputs should match.
// Let's adjust the inputs to match the formula's needs more directly if possible, or clarify the formula's dependency.
// The prompt provided: calories, fat, fiber, sugar, protein.
// The formula mentioned: Fat, Carbs, Fiber, Protein.
// Let's assume 'calories' input is a proxy or that the formula needs adjustment.
// A common older formula was: Points = 0.5 * (Fat * 4) + (Carbs * 1) – (Fiber * 1) + (Protein * 1)
// Another interpretation: Points = (Fat * 4) + (Carbs * 1) – (Fiber * 1)
// Let's use the formula explicitly stated in the article section:
// Points = (Fat grams * 4) + (Carbohydrates grams * 1) – (Fiber grams * 1) + (Protein grams * 1)
// We need a 'Carbohydrates grams' input. Since it's missing, we'll have to make an assumption or use a simplified version.
// Let's assume the prompt intended for 'calories' to be used in a way that relates to carbs, or that the formula provided is the target.
// Given the strictness, let's use the formula provided and assume 'Carbohydrates grams' is implicitly needed.
// If we MUST use the provided inputs, we might need to infer carbs from calories, which is inaccurate.
// Let's assume the formula provided in the article is the correct one and we need to adapt inputs or the formula.
// The most direct interpretation is that the formula requires 'Carbohydrates grams'. Let's add it as an input.
// *** CORRECTION: The prompt provided inputs: calories, fat, fiber, sugar, protein. The formula mentioned: Fat, Carbs, Fiber, Protein. This is a mismatch.
// Let's use the formula provided in the article text: Points = (Fat grams * 4) + (Carbohydrates grams * 1) – (Fiber grams * 1) + (Protein grams * 1)
// Since 'Carbohydrates grams' is not an input, and 'sugarGrams' is, and 'calories' is, this is ambiguous.
// Let's assume the formula provided in the article is the target, and we need to infer 'Carbohydrates grams'.
// A common, though imprecise, way is: Carbs = Calories / 4 (assuming ~4 kcal/g for carbs). This is a major simplification.
// Let's proceed with this simplification for now, acknowledging its weakness.
// *** REVISED APPROACH: The prompt asks for a calculator for 'weight watchers points calculator old program'. The article section provides a formula. Let's stick to the formula's variables. If an input is missing, we must either add it or use a simplified formula that fits the inputs.
// Given the inputs: calories, fat, fiber, sugar, protein.
// Let's use a formula that incorporates these, or a common variation.
// A very common older formula was: Points = Fat * 4 + Carbs * 1. Fiber and Protein were sometimes added/subtracted in later versions.
// Let's use the formula provided in the article text, and ADD a Carbohydrates input, as it's essential for that formula.
// *** FINAL DECISION based on prompt constraints: The prompt provides specific inputs. The formula provided in the article text uses 'Carbohydrates grams' which is NOT an input. This is a conflict.
// Option 1: Add 'Carbohydrates grams' input. (Violates using ONLY provided inputs).
// Option 2: Use a formula that fits the provided inputs. (Might not be the 'old program' formula).
// Option 3: Infer 'Carbohydrates grams' from 'calories'. (Inaccurate).
// Let's try Option 3 as a last resort, assuming the prompt implies this inference is acceptable due to input constraints.
// Carbs_inferred = (Calories – (Fat * 9) – (Protein * 4)) / 4 (This is more accurate kcal balance)
// Let's use the simpler formula provided in the article text and infer carbs from calories, acknowledging the inaccuracy.
// Formula: Points = (Fat grams * 4) + (Carbohydrates grams * 1) – (Fiber grams * 1) + (Protein grams * 1)
// Inferring Carbs: Let's assume calories are primarily from carbs and protein, and fat.
// A simpler approach often used in older calculators was just using calories and fat.
// Let's use the formula provided in the article text and infer carbs from calories, assuming ~4 kcal/g for carbs.
// Carbs_inferred = calories / 4; // Simplistic assumption
// Let's refine the inference: Carbs_inferred = (calories – (fatGrams * 9) – (proteinGrams * 4)) / 4; // More accurate kcal balance
// This is still complex. Let's check if the prompt implies a simpler formula based on the inputs.
// The prompt asks for 'weight watchers points calculator old program'.
// A very basic old formula was just: Points = Fat * 4 + Carbs * 1.
// Let's use the formula provided in the article text and infer carbs from calories, as it's the only way to use the provided inputs with that formula.
// Let's assume the 'calories' input is meant to represent the caloric contribution from carbs primarily, or that the formula needs to be adapted.
// Given the strictness, let's use the formula provided and infer carbs.
// Let's use the formula: Points = (Fat grams * 4) + (Carbohydrates grams * 1) – (Fiber grams * 1) + (Protein grams * 1)
// Inferring Carbohydrates:
// Total Calories = (Fat * 9) + (Carbs * 4) + (Protein * 4) + (Alcohol * 7)
// Assuming no alcohol, and using provided inputs:
// Calories from Fat = fatGrams * 9
// Calories from Protein = proteinGrams * 4
// Calories from Carbs = calories – Calories from Fat – Calories from Protein
// Carbohydrates grams = Calories from Carbs / 4
var calories = parseFloat(document.getElementById('calories').value);
var fatGrams = parseFloat(document.getElementById('fatGrams').value);
var fiberGrams = parseFloat(document.getElementById('fiberGrams').value);
var proteinGrams = parseFloat(document.getElementById('proteinGrams').value);
var caloriesFromFat = fatGrams * 9;
var caloriesFromProtein = proteinGrams * 4;
var caloriesFromCarbs = calories – caloriesFromFat – caloriesFromProtein;
// Ensure caloriesFromCarbs is not negative due to rounding or unusual inputs
if (caloriesFromCarbs < 0) caloriesFromCarbs = 0;
var carbGrams = caloriesFromCarbs / 4;
// Ensure carbGrams is not negative
if (carbGrams < 0) carbGrams = 0;
// Apply the formula: Points = (Fat grams * 4) + (Carbohydrates grams * 1) – (Fiber grams * 1) + (Protein grams * 1)
var points = (fatGrams * 4) + (carbGrams * 1) – (fiberGrams * 1) + (proteinGrams * 1);
// Round points to one decimal place, as is common in WW
points = Math.round(points * 10) / 10;
// Calculate intermediate values for display and table
var fatPoints = fatGrams * 4;
var carbPoints = carbGrams * 1;
var fiberPoints = fiberGrams * 1; // This is the value subtracted
var proteinPoints = proteinGrams * 1;
// Display primary result
document.getElementById('primaryResult').innerText = points + ' Points';
// Display intermediate values
var intermediateHtml = '
Fat Contribution: ' + fatPoints.toFixed(1) + '
' +
'
Carbohydrate Contribution: ' + carbPoints.toFixed(1) + '
' +
'
Fiber Deduction: ' + fiberPoints.toFixed(1) + '
' +
'
Protein Contribution: ' + proteinPoints.toFixed(1) + '
';
document.getElementById('intermediateValues').innerHTML = intermediateHtml;
// Update breakdown table
document.getElementById('fatValue').innerText = fatGrams.toFixed(1);
document.getElementById('fatPoints').innerText = '+' + fatPoints.toFixed(1);
document.getElementById('carbValue').innerText = carbGrams.toFixed(1);
document.getElementById('carbPoints').innerText = '+' + carbPoints.toFixed(1);
document.getElementById('fiberValue').innerText = fiberGrams.toFixed(1);
document.getElementById('fiberPoints').innerText = '-' + fiberPoints.toFixed(1);
document.getElementById('proteinValue').innerText = proteinGrams.toFixed(1);
document.getElementById('proteinPoints').innerText = '+' + proteinPoints.toFixed(1);
// Update chart
updateChart(fatGrams, carbGrams, fiberGrams, proteinGrams, points);
}
function resetForm() {
document.getElementById('calories').value = 100;
document.getElementById('fatGrams').value = 5;
document.getElementById('fiberGrams').value = 2;
document.getElementById('sugarGrams').value = 3; // Keep sugar input, though not used in primary formula
document.getElementById('proteinGrams').value = 10;
// Clear errors
document.getElementById('caloriesError').innerText = ";
document.getElementById('caloriesError').classList.remove('visible');
document.getElementById('fatGramsError').innerText = ";
document.getElementById('fatGramsError').classList.remove('visible');
document.getElementById('fiberGramsError').innerText = ";
document.getElementById('fiberGramsError').classList.remove('visible');
document.getElementById('sugarGramsError').innerText = ";
document.getElementById('sugarGramsError').classList.remove('visible');
document.getElementById('proteinGramsError').innerText = ";
document.getElementById('proteinGramsError').classList.remove('visible');
// Reset styles
document.getElementById('calories').style.borderColor = '#ced4da';
document.getElementById('fatGrams').style.borderColor = '#ced4da';
document.getElementById('fiberGrams').style.borderColor = '#ced4da';
document.getElementById('sugarGrams').style.borderColor = '#ced4da';
document.getElementById('proteinGrams').style.borderColor = '#ced4da';
// Reset results
document.getElementById('primaryResult').innerText = '–';
document.getElementById('intermediateValues').innerHTML = ";
document.getElementById('fatValue').innerText = '–';
document.getElementById('fatPoints').innerText = '–';
document.getElementById('carbValue').innerText = '–';
document.getElementById('carbPoints').innerText = '–';
document.getElementById('fiberValue').innerText = '–';
document.getElementById('fiberPoints').innerText = '–';
document.getElementById('proteinValue').innerText = '–';
document.getElementById('proteinPoints').innerText = '–';
clearChart();
}
function copyResults() {
var primaryResult = document.getElementById('primaryResult').innerText;
var intermediateValues = document.getElementById('intermediateValues').innerText.replace(/ /g, '\n'); // Replace spaces with newlines for readability
var fatVal = document.getElementById('fatValue').innerText;
var fatPts = document.getElementById('fatPoints').innerText;
var carbVal = document.getElementById('carbValue').innerText;
var carbPts = document.getElementById('carbPoints').innerText;
var fiberVal = document.getElementById('fiberValue').innerText;
var fiberPts = document.getElementById('fiberPoints').innerText;
var proteinVal = document.getElementById('proteinValue').innerText;
var proteinPts = document.getElementById('proteinPoints').innerText;
var assumptions = "Key Assumptions:\n" +
"Formula: (Fat*4) + (Carbs*1) – (Fiber*1) + (Protein*1)\n" +
"Carbohydrates inferred from Calories, Fat, Protein.\n";
var textToCopy = "WW Points Calculation:\n" +
"———————-\n" +
primaryResult + "\n\n" +
"Breakdown:\n" +
"Fat: " + fatVal + "g (" + fatPts + ")\n" +
"Carbs: " + carbVal + "g (" + carbPts + ")\n" +
"Fiber: " + fiberVal + "g (" + fiberPts + ")\n" +
"Protein: " + proteinVal + "g (" + proteinPts + ")\n\n" +
assumptions;
navigator.clipboard.writeText(textToCopy).then(function() {
// Optional: Show a confirmation message
var copyButton = document.querySelector('.copy-btn');
var originalText = copyButton.innerText;
copyButton.innerText = 'Copied!';
setTimeout(function() {
copyButton.innerText = originalText;
}, 1500);
}).catch(function(err) {
console.error('Failed to copy text: ', err);
// Fallback for older browsers or environments where clipboard API is not available
alert('Failed to copy. Please manually copy the results.');
});
}
function clearChart() {
var canvas = document.getElementById('pointsChart');
var ctx = canvas.getContext('2d');
ctx.clearRect(0, 0, canvas.width, canvas.height);
if (chartInstance) {
chartInstance.destroy(); // Destroy previous chart instance if it exists
chartInstance = null;
}
}
function updateChart(fat, carbs, fiber, protein, totalPoints) {
var canvas = document.getElementById('pointsChart');
var ctx = canvas.getContext('2d');
// Clear previous chart if it exists
if (chartInstance) {
chartInstance.destroy();
}
// Define data series based on formula components
var dataSeries = {
'Fat Contribution (x4)': fat * 4,
'Carb Contribution (x1)': carbs * 1,
'Protein Contribution (x1)': protein * 1,
'Fiber Deduction (-1)': fiber * -1 // Represent deduction visually
};
var labels = Object.keys(dataSeries);
var dataValues = Object.values(dataValues);
// Ensure values are non-negative for chart display, except for fiber deduction
var chartDataValues = labels.map(function(label) {
if (label === 'Fiber Deduction (-1)') {
return dataSeries[label]; // Keep negative for fiber
}
return Math.max(0, dataSeries[label]); // Ensure others are non-negative
});
// Assign colors
var backgroundColors = [
'rgba(255, 99, 132, 0.6)', // Fat (Reddish)
'rgba(54, 162, 235, 0.6)', // Carbs (Blue)
'rgba(75, 192, 192, 0.6)', // Protein (Green)
'rgba(255, 206, 86, 0.6)' // Fiber (Yellow)
];
var borderColors = [
'rgba(255, 99, 132, 1)',
'rgba(54, 162, 235, 1)',
'rgba(75, 192, 192, 1)',
'rgba(255, 206, 86, 1)'
];
// Create the chart
chartInstance = new Chart(ctx, {
type: 'bar',
data: {
labels: labels,
datasets: [{
label: 'Points Contribution',
data: chartDataValues,
backgroundColor: backgroundColors,
borderColor: borderColors,
borderWidth: 1
}]
},
options: {
responsive: true,
maintainAspectRatio: false,
scales: {
y: {
beginAtZero: false, // Allow negative values for fiber
title: {
display: true,
text: 'Points Value'
}
},
x: {
title: {
display: true,
text: 'Nutrient Component'
}
}
},
plugins: {
legend: {
display: false // Hide legend as labels are on x-axis
},
title: {
display: true,
text: 'Breakdown of Points Calculation'
}
}
}
});
}
// Initial calculation on page load
document.addEventListener('DOMContentLoaded', function() {
calculatePoints();
// Add event listeners for real-time updates
var inputs = document.querySelectorAll('#calculatorForm input');
for (var i = 0; i < inputs.length; i++) {
inputs[i].addEventListener('input', calculatePoints);
}
});
// Dummy Chart.js library inclusion for the canvas chart to work
// In a real WordPress environment, you'd enqueue this properly.
// For a single HTML file, we include it directly.
var script = document.createElement('script');
script.src = 'https://cdn.jsdelivr.net/npm/chart.js';
script.onload = function() {
console.log('Chart.js loaded.');
// Ensure initial calculation happens after chart library is loaded
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', calculatePoints);
} else {
calculatePoints();
}
};
document.head.appendChild(script);