[英]Chart.JS Format Labels For DataSets Differently
我正在使用Chart.JS創建一個組合圖,它是一個條形/線形組合。 我想用%
符號顯示的dataset[0]
的標簽和我想用$
符號顯示的dataset[1]
的標簽。 現在,當我提到標簽時,我的意思是當您將鼠標懸停在條形圖上時,顯示的內容及其信息。 我嘗試了以下語法,但是甚至都沒有圖表顯示(我更改了代碼以添加if
語句來嘗試解決dataset[0]
和dataset[1]
)
使dataset[0]
顯示%
符號和dataset[1]
顯示$
符號的正確方法是什么?
var labelsarr = ["Red 12", "Red 13", "Yellow 12", "Yellow 13", "Blue 12", "Blue 13"],
;
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: labelsarr,
datasets: [{
type: 'line',
fill: false,
label: 'Percent',
backgroundColor: 'rgba(255,0,0,1)',
borderColor: 'rgba(255,0,0,1)',
data: [3, 4, 10, 5, 8, 7],
}, {}
data: [12, 19, 3, 5, 2, 3],
label: 'Total Revenue',
backgroundColor: 'rgba(0, 129, 214, 0.8)',
}]
},
options: {
tooltips: {
callbacks: {
if (chart.data.datasets = [1]) {
label: function(t, d) {
var xLabel = d.datasets[t.datasetIndex].label;
var yLabel = t.yLabel >= 1000 ? '$' + t.yLabel.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",") : '$' + t.yLabel;
return xLabel + ': ' + yLabel;
}
}
if (chart.data.datasets = [0]) {
label: function(value) {
return value + "%"
}
}
}
}
},
legend: {
display: false,
position: 'top',
},
scales: {
yAxes: [{
ticks: {
beginAtZero: true,
callback: function(value, index, values) {
if (parseInt(value) >= 1000) {
return '$' + value.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
} else {
return '$' + value;
}
}
}
}]
}
},
plugins: [{
beforeDraw: function(chart) {
var labels = chart.data.labels;
labels.forEach(function(e, i) {
var bar = chart.data.datasets[1]._meta[0].data[i]._model;
var dataPoint = e.split(/\s/)[1];
if (dataPoint === '12')
bar.backgroundColor = 'blue';
else if (dataPoint === '13')
bar.backgroundColor = 'orange';
});
}
}]
});
使用以下工具提示回調函數:
callbacks: {
label: function(t, d) {
if (t.datasetIndex === 0) {
var xLabel = d.datasets[t.datasetIndex].label;
var yLabel = t.yLabel + '%';
return xLabel + ': ' + yLabel;
} else if (t.datasetIndex === 1) {
var xLabel = d.datasets[t.datasetIndex].label;
var yLabel = t.yLabel >= 1000 ? '$' + t.yLabel.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",") : '$' + t.yLabel;
return xLabel + ': ' + yLabel;
}
}
}
ᴡᴏʀᴋɪɴɢᴇxᴀᴍᴘʟᴇ
var labelsarr = ["Red 12", "Red 13", "Yellow 12", "Yellow 13", "Blue 12", "Blue 13"]; var ctx = document.getElementById("myChart"); var myChart = new Chart(ctx, { type: 'bar', data: { labels: labelsarr, datasets: [{ type: 'line', fill: false, label: 'Percent', backgroundColor: 'rgba(255,0,0,1)', borderColor: 'rgba(255,0,0,1)', data: [3, 4, 10, 5, 8, 7], }, { data: [12, 19, 3, 5, 2, 3], label: 'Total Revenue', backgroundColor: 'rgba(0, 129, 214, 0.8)', }] }, options: { tooltips: { callbacks: { label: function(t, d) { if (t.datasetIndex === 0) { var xLabel = d.datasets[t.datasetIndex].label; var yLabel = t.yLabel + '%'; return xLabel + ': ' + yLabel; } else if (t.datasetIndex === 1) { var xLabel = d.datasets[t.datasetIndex].label; var yLabel = t.yLabel >= 1000 ? '$' + t.yLabel.toString().replace(/\\B(?=(\\d{3})+(?!\\d))/g, ",") : '$' + t.yLabel; return xLabel + ': ' + yLabel; } } } }, legend: { display: false, position: 'top', }, scales: { yAxes: [{ ticks: { beginAtZero: true, callback: function(value, index, values) { if (parseInt(value) >= 1000) { return '$' + value.toString().replace(/\\B(?=(\\d{3})+(?!\\d))/g, ","); } else { return '$' + value; } } } }] } }, plugins: [{ beforeDraw: function(chart) { var labels = chart.data.labels; labels.forEach(function(e, i) { var bar = chart.data.datasets[1]._meta[0].data[i]._model; var dataPoint = e.split(/\\s/)[1]; if (dataPoint === '12') bar.backgroundColor = 'blue'; else if (dataPoint === '13') bar.backgroundColor = 'orange'; }); } }] });
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.min.js"></script> <canvas id="myChart"></canvas>
一些語法問題已修復,請仔細查找。
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