我正在开发一个 Laravel 项目，其中使用 Alpine.js 进行交互，使用 Chart.js 进行数据可视化。我的设置在 Alpine.js 2.8.2 上运行良好，但是当我升级到 Alpine.js 3.x 时，遇到以下错误：
chart.js:19 Uncaught TypeError: Cannot read properties of null (reading 'save')
at Ie (chart.js:19:18331)
at An._drawDataset (chart.js:19:98188)
at An._drawDatasets (chart.js:19:97819)
at An.draw (chart.js:19:97350)
at chart.js:13:6948
at Map.forEach (<anonymous>)
at xt._update (chart.js:13:6727)
at chart.js:13:6620
这是我的 Blade 模板与 JavaScript 初始化的相关部分：
@extends('admin.layouts.app')
@section('vendor-styles')
<link rel="stylesheet" href="{{ asset('plugins/flatpickr/flatpickr.min.css') }}">
@endsection
@section('breadcrumbs')
<li>
<a href="#" class="text-gray-500 hover:text-gray-700">Dashboard</a>
</li>
@endsection
@section('content')
<div x-data="dashboard()" x-init="init()">
<!-- Time Range Filter -->
<div class="bg-white p-4 rounded shadow mb-4">
<div class="flex space-x-4 mb-4">
<button @click="timeRange = 'today'; customRange = false"
:class="{ 'bg-blue-600 text-white': timeRange === 'today', 'bg-gray-200 text-gray-800': timeRange !== 'today' }"
class="p-2 rounded">Hôm nay
</button>
<button @click="timeRange = 'thisWeek'; customRange = false"
:class="{ 'bg-blue-600 text-white': timeRange === 'thisWeek', 'bg-gray-200 text-gray-800': timeRange !== 'thisWeek' }"
class="p-2 rounded">Tuần này
</button>
<button @click="timeRange = 'thisMonth'; customRange = false"
:class="{ 'bg-blue-600 text-white': timeRange === 'thisMonth', 'bg-gray-200 text-gray-800': timeRange !== 'thisMonth' }"
class="p-2 rounded">Tháng này
</button>
<button @click="timeRange = 'thisYear'; customRange = false"
:class="{ 'bg-blue-600 text-white': timeRange === 'thisYear', 'bg-gray-200 text-gray-800': timeRange !== 'thisYear' }"
class="p-2 rounded">Năm này
</button>
<button @click="timeRange = 'custom'; customRange = true"
:class="{ 'bg-blue-600 text-white': timeRange === 'custom', 'bg-gray-200 text-gray-800': timeRange !== 'custom' }"
class="p-2 rounded">Khoảng thời gian
</button>
</div>
<div x-show="customRange" class="flex space-x-4">
<input x-ref="datepicker" class="p-2 bg-gray-200 rounded" placeholder="Chọn khoảng thời gian">
</div>
</div>
<!-- Sales Overview -->
<div class="bg-white p-4 rounded shadow mb-4">
<h2 class="text-xl font-semibold mb-2">Tổng quan</h2>
<div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
<div class="p-6 bg-green-100 rounded-lg shadow-md flex items-center">
<div class="flex-1">
<div class="text-lg font-medium text-green-800 flex items-center">
<i class="fas fa-dollar-sign mr-2"></i>
Tổng doanh thu
</div>
<div class="text-3xl font-bold text-green-900" x-text="totalSales.revenue"></div>
</div>
{{-- <div class="text-green-600 flex items-center">--}}
{{-- <i class="fas fa-arrow-up text-2xl"></i>--}}
{{-- <span class="ml-1 text-xl font-semibold">15%</span>--}}
{{-- </div>--}}
</div>
<div class="p-6 bg-blue-100 rounded-lg shadow-md flex items-center">
<div class="flex-1">
<div class="text-lg font-medium text-green-800 flex items-center">
<i class="fas fa-dollar-sign mr-2"></i>
Tổng chi phí
</div>
<div class="text-3xl font-bold text-green-900" x-text="totalSales.cost"></div>
</div>
{{-- <div class="text-green-600 flex items-center">--}}
{{-- <i class="fas fa-arrow-up text-2xl"></i>--}}
{{-- <span class="ml-1 text-xl font-semibold">15%</span>--}}
{{-- </div>--}}
</div>
<div class="p-6 bg-yellow-100 rounded-lg shadow-md flex items-center">
<div class="flex-1">
<div class="text-lg font-medium text-green-800 flex items-center">
<i class="fas fa-dollar-sign mr-2"></i>
Tổng lợi nhuận
</div>
<div class="text-3xl font-bold text-green-900" x-text="totalSales.profit"></div>
</div>
{{-- <div class="text-green-600 flex items-center">--}}
{{-- <i class="fas fa-arrow-up text-2xl"></i>--}}
{{-- <span class="ml-1 text-xl font-semibold">15%</span>--}}
{{-- </div>--}}
</div>
</div>
</div>
<!-- Sales Chart -->
<div class="bg-white p-4 rounded shadow mb-4">
<h2 class="text-xl font-semibold mb-2">Biểu Đồ Kinh Doanh</h2>
<canvas id="salesChart" width="400" height="200"></canvas>
</div>
<div class="grid grid-cols-1 md:grid-cols-2 gap-4">
<!-- Sales by Category Chart -->
<div class="bg-white p-4 rounded shadow mb-4">
<h2 class="text-xl font-semibold mb-2 text-center">Doanh Thu Theo Danh Mục Sản Phẩm</h2>
<canvas id="categoryChart" width="400" height="200"></canvas>
</div>
<!-- Sales by Brand Chart -->
<div class="bg-white p-4 rounded shadow mb-4">
<h2 class="text-xl font-semibold mb-2 text-center">Doanh Thu Theo Hãng Sản Xuất</h2>
<canvas id="brandChart" width="400" height="200"></canvas>
</div>
</div>
<!-- Recent Orders -->
<div class="bg-white p-4 rounded shadow mb-4">
<h2 class="text-xl font-semibold mb-2">Đơn Hàng Gần Đây</h2>
<table class="w-full text-left border-collapse">
<thead>
<tr>
<th class="p-2 border-b">Mã Đơn Hàng</th>
<th class="p-2 border-b">Khách Hàng</th>
<th class="p-2 border-b">Trạng Thái</th>
<th class="p-2 border-b">Ngày Đặt</th>
<th class="p-2 border-b">Tổng tiền</th>
</tr>
</thead>
<tbody>
<template x-for="order in recentOrders" :key="order.id">
<tr>
<td class="p-2 border-b">
<a :href="order?.url" x-text="order?.order_code" class="text-blue-600"></a>
</td>
<td class="p-2 border-b" x-text="order?.customer.name"></td>
<td class="p-2 border-b" x-text="order?.status"></td>
<td class="p-2 border-b" x-text="order?.formatted_created_at"></td>
<td class="p-2 border-b" x-text="order?.amount"></td>
</tr>
</template>
</tbody>
</table>
</div>
<div class="grid grid-cols-1 md:grid-cols-2 gap-4">
<!-- Top Selling Products -->
<div class="bg-white p-4 rounded shadow mb-4">
<h2 class="text-xl font-semibold mb-2">Top Sản Phẩm Bán Chạy</h2>
<ul>
<template x-for="product in topProducts" :key="product.id">
<li class="border-b py-2">
<span x-text="product.name"></span> - <span x-text="product.total_sales"></span>
</li>
</template>
</ul>
</div>
<!-- Inventory -->
<div class="bg-white p-4 rounded shadow mb-4">
<h2 class="text-xl font-semibold mb-2">Sản Phẩm Sắp Hết Hàng</h2>
<table class="w-full text-left border-collapse">
<thead>
<tr>
<th class="p-2 border-b">Tên Sản Phẩm</th>
<th class="p-2 border-b">Màu Sắc</th>
<th class="p-2 border-b">Số Lượng Còn Lại</th>
</tr>
</thead>
<tbody>
<template x-for="product in lowStockProducts" :key="product.id">
<tr>
<td class="p-2 border-b">
<a :href="product?.url" x-text="product?.product_name" class="text-blue-600"></a>
</td>
<td class="p-2 border-b" x-text="product?.color"></td>
<td class="p-2 border-b" x-text="product?.quantity"></td>
</tr>
</template>
</tbody>
</table>
</div>
</div>
<div class="grid grid-cols-1 md:grid-cols-2 gap-4">
<div class="bg-white p-4 rounded shadow mb-4">
<h2 class="text-xl font-semibold mb-2">Trạng thái đơn hàng</h2>
<table class="w-full text-left border-collapse">
<thead>
<tr>
<th class="p-2 border-b">Trạng Thái</th>
<th class="p-2 border-b">Số Đơn</th>
<th class="p-2 border-b">Tổng Doanh Thu</th>
</tr>
</thead>
<tbody>
<template x-for="(groupStatus, index) in orderByStatus" :key="index">
<tr>
<td class="p-2 border-b" x-text="groupStatus?.status"></td>
<td class="p-2 border-b" x-text="groupStatus?.count"></td>
<td class="p-2 border-b" x-text="groupStatus?.revenue"></td>
</tr>
</template>
</tbody>
</table>
</div>
</div>
</div>
@endsection
@section('vendor-scripts')
<script src="{{ asset('plugins/chartjs/chart.js') }}"></script>
<script src="{{ asset('plugins/flatpickr/flatpickr.min.js') }}"></script>
<script src="{{ asset('plugins/flatpickr/lang/vn.js') }}"></script>
@endsection
@section('custom-scripts')
<script>
function formatTooltip(tooltipItem) {
let value = tooltipItem.raw;
let formattedValue = new Intl.NumberFormat('vi-VN', {
style: 'currency',
currency: 'VND'
}).format(value);
return `${tooltipItem.dataset.label}: ${formattedValue}`;
}
function dashboard() {
return {
customRange: false,
startDate: '',
endDate: '',
selectedDate: '',
totalSales: {
today: '',
week: '',
month: '',
year: '',
},
recentOrders: [],
topProducts: [],
lowStockProducts: [],
salesChartData: {
labels: [],
revenue: [],
cost: [],
profit: []
},
categoryChartData: {
labels: [],
data: []
},
brandChartData: {
labels: [],
data: []
},
salesChart: null,
categoryChart: null,
brandChart: null,
timeRange: 'today',
timeRangePicker: null,
orderByStatus: [],
init() {
this.fetchDashboardData();
this.initFlatpickr();
this.$watch('timeRange', (value) => {
if (value !== 'custom') {
this.fetchDashboardData();
}
});
this.$watch('startDate', () => {
if (this.customRange && this.startDate && this.endDate) {
this.fetchDashboardData();
}
});
this.$watch('endDate', () => {
if (this.customRange && this.startDate && this.endDate) {
this.fetchDashboardData();
}
});
this.$watch('customRange', (value) => {
if (!value) {
this.startDate = '';
this.endDate = '';
this.timeRangePicker?.clear();
}
});
},
fetchDashboardData() {
const url = `{{ route('admin.dashboardData') }}?timeRange=${this.timeRange}&startDate=${this.startDate}&endDate=${this.endDate}`;
fetch(url, {headers: {'Accept': 'application/json'}})
.then(response => response.json())
.then(data => {
this.totalSales.revenue = `${data.totalSales.revenue}`;
this.totalSales.cost = `${data.totalSales.cost}`;
this.totalSales.profit = `${data.totalSales.profit}`;
this.recentOrders = data.recentOrders;
this.topProducts = data.topProducts;
this.lowStockProducts = data.lowStockProducts;
this.orderByStatus = data.orderByStatus;
this.salesChartData.labels = data.salesChartData.labels;
this.salesChartData.revenue = data.salesChartData.revenue;
this.salesChartData.cost = data.salesChartData.cost;
this.salesChartData.profit = data.salesChartData.profit;
this.categoryChartData.labels = data.salesByCategory.labels;
this.categoryChartData.data = data.salesByCategory.data;
this.brandChartData.labels = data.salesByBrand.labels;
this.brandChartData.data = data.salesByBrand.data;
this.updateSalesChart();
this.updateCategoryChart();
this.updateBrandChart();
});
},
updateSalesChart() {
const ctx = document.getElementById('salesChart').getContext('2d');
if (this.salesChart) {
this.salesChart.destroy();
}
this.salesChart = new Chart(ctx, {
type: 'bar',
data: {
labels: this.salesChartData.labels,
datasets: [
{
label: 'Doanh thu',
data: this.salesChartData.revenue,
backgroundColor: 'rgba(75, 192, 192, 0.2)',
borderColor: 'rgba(75, 192, 192, 1)',
borderWidth: 1
},
{
label: 'Chi phí',
data: this.salesChartData.cost,
backgroundColor: 'rgba(255, 99, 132, 0.2)',
borderColor: 'rgba(255, 99, 132, 1)',
borderWidth: 1
},
{
label: 'Lợi nhuận',
data: this.salesChartData.profit,
backgroundColor: 'rgba(54, 162, 235, 0.2)',
borderColor: 'rgba(54, 162, 235, 1)',
borderWidth: 1,
type: 'line'
}
]
},
options: {
scales: {
y: {
beginAtZero: true
}
},
plugins: {
tooltip: {
callbacks: {
label: formatTooltip
}
}
},
}
});
},
updateCategoryChart() {
const ctx = document.getElementById('categoryChart').getContext('2d');
if (this.categoryChart) {
this.categoryChart.destroy();
}
this.categoryChart = new Chart(ctx, {
type: 'pie',
data: {
labels: this.categoryChartData.labels,
datasets: [
{
label: 'Doanh thu',
data: this.categoryChartData.data,
backgroundColor: this.categoryChartData.labels.map(() => `rgba(${Math.floor(Math.random() * 255)}, ${Math.floor(Math.random() * 255)}, ${Math.floor(Math.random() * 255)}, 0.2)`),
borderColor: this.categoryChartData.labels.map(() => `rgba(${Math.floor(Math.random() * 255)}, ${Math.floor(Math.random() * 255)}, ${Math.floor(Math.random() * 255)}, 1)`),
borderWidth: 1
}
]
},
options: {
plugins: {
tooltip: {
callbacks: {
label: formatTooltip
}
}
},
}
});
},
updateBrandChart() {
const ctx = document.getElementById('brandChart').getContext('2d');
if (this.brandChart) {
this.brandChart.destroy();
}
this.brandChart = new Chart(ctx, {
type: 'pie',
data: {
labels: this.brandChartData.labels,
datasets: [
{
label: 'Doanh thu',
data: this.brandChartData.data,
backgroundColor: this.brandChartData.labels.map(() => `rgba(${Math.floor(Math.random() * 255)}, ${Math.floor(Math.random() * 255)}, ${Math.floor(Math.random() * 255)}, 0.2)`),
borderColor: this.brandChartData.labels.map(() => `rgba(${Math.floor(Math.random() * 255)}, ${Math.floor(Math.random() * 255)}, ${Math.floor(Math.random() * 255)}, 1)`),
borderWidth: 1
}
]
},
options: {
plugins: {
tooltip: {
callbacks: {
label: formatTooltip
}
}
},
}
});
},
initFlatpickr() {
this.timeRangePicker = flatpickr(this.$refs.datepicker, {
onChange: ([startDate, endDate]) => {
if (startDate && endDate) {
this.startDate = flatpickr.formatDate(startDate, 'Y-m-d');
this.endDate = flatpickr.formatDate(endDate, 'Y-m-d');
}
},
locale: "vn",
mode: "range",
altInput: true,
conjunction: " - ",
maxDate: "today",
altFormat: "d/m/Y",
dateFormat: "Y-m-d",
});
},
}
}
</script>
@endsection
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests">
<title>Admin Dashboard - Product Management</title>
{{-- <link rel="stylesheet" href="{{ asset('AdminLTE/dist/css/AdminLTE.min.css') }}">--}}
<script src="{{ asset('plugins/tailwindcss/tailwindcss.min.css') }}"></script>
<link rel="stylesheet" href="{{ asset('plugins/fontawesome/css/all.min.css') }}"/>
<script src="{{ asset('plugins/alpinejs/alpine.min.js') }}" defer></script>
@yield('vendor-styles')
@yield('custom-styles')
</head>
<body class="bg-gray-100">
<!-- Sidebar -->
@include('admin.layouts.includes.sidebar')
<!-- Main Content -->
<div class="flex-1 flex flex-col">
<!-- Navbar -->
@include('admin.layouts.includes.header')
<!-- Breadcrumbs -->
<nav class="bg-gray border-b border-gray-200">
<div class="max-w-7xl mx-auto py-3 px-4 sm:px-6 lg:px-8">
<ol class="flex items-center space-x-4">
@yield('breadcrumbs')
</ol>
</div>
</nav>
<!-- Main Section -->
<main class="flex-1 bg-gray-100">
<div class="max-w-7xl mx-auto py-6 sm:px-6 lg:px-8">
@yield('content')
</div>
</main>
<!-- Footer -->
@include('admin.layouts.includes.footer')
</div>
<script src="{{ asset('plugins/htmx/htmx.js') }}"></script>
@yield('vendor-scripts')
@yield('custom-scripts')
</body>
</html>
图表在 Alpine.js 2.8.2 中渲染正确，但在 Alpine.js 3.x 中渲染失败，显示上述错误。Alpine.js 3.x 可能导致此问题的原因是什么，如何解决？
任何见解或解决方案将不胜感激。
在 AlpineJs v3 中，数据对象的 init() 方法（如果存在）会在启动时自动执行。
在你的 main
init() {
console.log ("init executed", Date.now());
.....
要解决该问题，请从主中删除