[英]HorizontalBar chart is displayed below canvas when I set height with style attribute for chart div (Chart.js 2.9.4)
如果我使用樣式屬性為圖表 div 設置高度
<div id="chartDiv" style="height: 100px; border: 1px solid red;"><canvas id="chart"></canvas></div>
圖表看起來像這樣(圖表顯示在畫布下方):
var barChartData = { labels: [""], datasets: [{ label: "1", backgroundColor: "rgba(68,222,166,1)", barThickness: 50, data: [177] }, { label: "2", barThickness: 50, backgroundColor: "rgba(218, 65, 102, 1)", data: [170] } ] }; var optionsBar = { legend: false, title: { display: false }, scales: { xAxes: [{ stacked: true, display: false }], yAxes: [{ stacked: true, display: false }] } }; var ctx = document.getElementById("chart"); var myChart = new Chart(ctx, { type: 'horizontalBar', data: barChartData, options: optionsBar });
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.bundle.min.js"></script> <body style="background-color: grey;"> <div id="chartDiv" style="height: 100px; border: 1px solid red;"><canvas id="chart"></canvas></div> </body>
如何解決?
它顯示為這樣是因為畫布的縱橫比會隨着窗口大小自動變化,但您已將 div 設置為特定高度100px
。 這就是為什么畫布在窗口大小擴展時放置在 div 之外的原因。 只是為了擺脫這個問題,以這種方式在您的選項中設置maintainAspectRatio: false
:
var barChartData = { labels: [""], datasets: [{ label: "1", backgroundColor: "rgba(68,222,166,1)", barThickness: 50, data: [177] }, { label: "2", barThickness: 50, backgroundColor: "rgba(218, 65, 102, 1)", data: [170] } ] }; var optionsBar = { maintainAspectRatio: false, legend: false, title: { display: false }, scales: { xAxes: [{ stacked: true, display: false }], yAxes: [{ stacked: true, display: false }] } }; var ctx = document.getElementById("chart"); var myChart = new Chart(ctx, { type: 'horizontalBar', data: barChartData, options: optionsBar });
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.bundle.min.js"></script> <body style="background-color: grey;"> <div id="chartDiv" style="height: 100px; border: 1px solid red;"><canvas id="chart"></canvas></div> </body>
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