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/* Line Chart — frontend.js (Chart.js via CDN) */ |
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( function () { |
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var CHARTJS_CDN = 'https://cdn.jsdelivr.net/npm/chart.js@4.4.3/dist/chart.umd.min.js'; |
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|
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function loadChartJs( cb ) { |
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if ( window.Chart ) { cb(); return; } |
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var s = document.createElement('script'); |
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s.src = CHARTJS_CDN; |
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s.onload = cb; |
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document.head.appendChild(s); |
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} |
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|
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function initChart( wrap ) { |
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var canvas = wrap.querySelector('canvas'); |
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if (!canvas) return; |
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|
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var labels = (wrap.dataset.labels || '').split(',').map(s=>s.trim()); |
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var datasets = JSON.parse(wrap.dataset.datasets || '[]'); |
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var height = parseInt(wrap.dataset.height) || 340; |
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var showGrid = wrap.dataset.grid !== '0'; |
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var showLeg = wrap.dataset.legend !== '0'; |
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var legPos = wrap.dataset.legendPos || 'top'; |
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var ptStyle = wrap.dataset.pointStyle || 'circle'; |
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|
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canvas.height = height; |
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|
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var chartDatasets = datasets.map(function(ds) { |
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var rgb = hexToRgb(ds.color || '#6c3fb5'); |
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return { |
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label: ds.label, |
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data: (ds.data||'').split(',').map(Number), |
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borderColor: ds.color, |
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backgroundColor: ds.fill ? ('rgba('+rgb+',0.15)') : 'transparent', |
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fill: !!ds.fill, |
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tension: ds.tension !== undefined ? ds.tension : 0.4, |
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pointStyle: ptStyle === 'false' ? false : ptStyle, |
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pointRadius: ptStyle === 'false' ? 0 : 5, |
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borderWidth: 2, |
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}; |
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}); |
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|
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new window.Chart(canvas, { |
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type: 'line', |
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data: { labels: labels, datasets: chartDatasets }, |
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options: { |
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responsive: true, |
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plugins: { |
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legend: { display: showLeg, position: legPos }, |
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}, |
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scales: { |
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x: { grid: { display: showGrid } }, |
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y: { grid: { display: showGrid } }, |
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}, |
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} |
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}); |
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} |
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|
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function hexToRgb(hex) { |
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var r = parseInt(hex.slice(1,3),16); |
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var g = parseInt(hex.slice(3,5),16); |
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var b = parseInt(hex.slice(5,7),16); |
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return r+','+g+','+b; |
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} |
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|
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function init() { |
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var wraps = document.querySelectorAll('.bklc-wrap[data-type]'); |
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if (!wraps.length) return; |
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loadChartJs(function() { wraps.forEach(initChart); }); |
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} |
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|
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if (document.readyState==='loading') document.addEventListener('DOMContentLoaded',init); |
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else init(); |
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}() ); |
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