Building Dynamic Scatter Charts in Laravel Using Chart.js: A Step-by-Step Guide

ArjunAmrutiya
3 min readNov 30, 2023

Introduction:
Scatter charts provide a powerful way to represent data points in a two-dimensional space.
In this tutorial, we’ll guide you through integrating Chart.js into your Laravel application to create dynamic and interactive scatter charts.

Prerequisites

Before you begin, ensure the following prerequisites are met:

  1. A Laravel project is set up.
  2. Basic knowledge of Laravel and JavaScript.
  3. Composer is installed for Laravel dependencies.

Step 1: Install Chart.js via CDN

Include Chart.js in your Laravel project by adding the following CDN link in the <head> section of your blade view:

<!DOCTYPE html>
<html lang="en">
<head>
<!-- Other head elements -->
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
</head>
<body>
<!-- Your Laravel application content -->
</body>
</html>

Step 2: Create a Controller

Generate a controller to handle the scatter chart data. Run the following Artisan command:

php artisan make:controller ScatterChartController

Step 3: Define Routes

In your routes/web.php file, define a route for the scatter chart controller:

use App\Http\Controllers\ScatterChartController;

Route::get('/scatter-chart', [ScatterChartController::class, 'scatterChart']);

Step 4: Implement the Controller

Open ScatterChartController.php and implement the controller logic:

<?php

namespace App\Http\Controllers;
use Illuminate\Http\Request;

class ScatterChartController extends Controller
{
public function scatterChart()
{
// Replace this with your actual data retrieval logic
$data = [
'labels' => ['Data Point 1', 'Data Point 2', 'Data Point 3', 'Data Point 4', 'Data Point 5'],
'data' => [
['x' => 10, 'y' => 20],
['x' => 15, 'y' => 25],
['x' => 20, 'y' => 30],
['x' => 25, 'y' => 35],
['x' => 30, 'y' => 40],
],
];
return view('scatter-chart', compact('data'));
}
}

Step 5: Create a Blade View

Create a new Blade view file (resources/views/scatter-chart.blade.php) to render the scatter chart:

<!DOCTYPE html>
<html lang="en">
<head>
<title>Scatter Chart Example</title>
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
</head>
<body>
<div style="width: 80%; margin: auto;">
<canvas id="scatterChart"></canvas>
</div>

<script>
var ctx = document.getElementById('scatterChart').getContext('2d');
var myChart = new Chart(ctx, {
type: 'scatter',
data: {
labels: @json($data['labels']),
datasets: [{
label: 'Scatter Chart',
data: @json($data['data']),
backgroundColor: 'rgba(75, 192, 192, 0.7)',
borderColor: 'rgba(75, 192, 192, 1)',
borderWidth: 1
}]
},
options: {
scales: {
x: {
type: 'linear',
position: 'bottom'
},
y: {
type: 'linear',
position: 'left'
}
}
}
});
</script>
</body>
</html>

Conclusion

Congratulations! You’ve successfully integrated Chart.js into your Laravel application to create dynamic scatter charts. Explore additional customization options provided by Chart.js to enhance the visual appeal of your scatter charts. Happy charting!

Note: As in the previous examples, replace the static data in the controller with dynamic data fetched from your database or external API for a real-world scenario.

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ArjunAmrutiya

👋 Hey there! I'm Arjun Amrutiya, a passionate web developer and blogger who loves all things PHP, Laravel and Vue.js. Welcome to my Medium account!