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/* Doughnut 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'); s.src=CHARTJS_CDN; s.onload=cb; 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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var slices = JSON.parse(wrap.dataset.slices||'[]'); |
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var cutout = (wrap.dataset.cutout||'60')+'%'; |
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var size = parseInt(wrap.dataset.size)||300; |
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var showLeg = wrap.dataset.legend!=='0'; |
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var legPos = wrap.dataset.legendPos||'bottom'; |
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|
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var canvasWrap = wrap.querySelector('.bkdc-canvas-wrap'); |
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if (canvasWrap) { canvasWrap.style.width=size+'px'; canvasWrap.style.height=size+'px'; } |
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|
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canvas.width = size; |
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canvas.height = size; |
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|
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new window.Chart(canvas,{ |
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type:'doughnut', |
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data:{ |
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labels: slices.map(s=>s.label), |
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datasets:[{ |
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data: slices.map(s=>s.value), |
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backgroundColor: slices.map(s=>s.color), |
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borderWidth: 2, |
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borderColor: '#fff', |
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}] |
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}, |
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options:{ |
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cutout: cutout, |
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responsive:false, |
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plugins:{legend:{display:showLeg,position:legPos}}, |
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} |
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}); |
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} |
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|
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function init(){ |
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var wraps=document.querySelectorAll('.bkdc-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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if(document.readyState==='loading') document.addEventListener('DOMContentLoaded',init); |
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else init(); |
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}() ); |
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