使用chart.js在图表中的图例中隐藏第一个标签 [英] Hide first label in legend in a Chart using chart.js
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问题描述
我创建了一个堆积的条形图,我必须隐藏第一个数据集的标签和图例中的框"Total Line",总之还是要隐藏第一个数据集或任何数据集的标签.我已经阅读了文档,选项中有一个过滤器,但是没有用.
隐藏此标签
这是图表的html和js
I have created a stacked bar chart and i have to hide first dataset's label and its box in legend which is "Total Line", Is there anyway to hide first or any dataset's label. i have read the documentation there is a filter in options but it didn't work.
Hiding This label
Here is the html and js for chart
var ctx = document.getElementById("girth-measure-chart");
var totalLine = [115, 118, 88, 93, 103, 118, 125]
var total = [112, 115, 85, 90, 100, 115, 122]
var arms = [46, 55, 41, 41, 47, 54, 57]
var neck = [17, 20, 15, 15, 17, 20, 21]
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep"],
datasets: [{
type: 'line',
label: 'Total Line',
data: totalLine,
fill: false,
borderColor: ["#ff7899"],
legend: false,
pointBackgroundColor: "#ff151f",
pointRadius: 8,
pointHoverRadius: 8,
pointHoverBackgroundColor: "#990e14",
pointHoverBorderColor: "#6754d3"
}, {
type: 'bar',
label: 'Neck',
data: neck,
backgroundColor: "#e99449",
hoverBackgroundColor: "#d36d14"
}, {
type: 'bar',
label: 'Arms',
data: arms,
backgroundColor: "#49bae9",
hoverBackgroundColor: "#0789bf"
}, {
type: 'bar',
label: 'Total',
data: total,
backgroundColor: "#6754d3",
hoverBackgroundColor: "#260cbd"
}
]
},
options: {
legend: {
display: true,
labels: {
display: true,
boxWidth: 12,
}
},
responsive: true,
scales: {
xAxes: [{
stacked: true,
gridLines: {
display: false
},
barThickness: 25,
ticks: {
display: true,
fontFamily: "Montserrat",
fontColor: "#2c405a",
fontSize: 12
}
}],
yAxes: [{
gridLines: {
display: false
},
ticks: {
display: false,
stepSize: 10,
min: 0,
max: 150,
}
}]
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.1/Chart.bundle.js"></script>
<div class="chart-container">
<div class="girth-measure-chart-inner" style="width: 100%;">
<canvas id="girth-measure-chart" height=""></canvas>
</div>
</div>
推荐答案
在选项下使用filter方法.
Use the filter method under options.
options: {
legend: {
labels: {
filter: function(legendItem, chartData) {
// return true or false based on legendItem's datasetIndex (legendItem.datasetIndex)
}
}
}
}
在您的情况下,对于第一个索引,返回false;对于其余索引,返回true.
In your case return false for the first index and true for the rest.
var ctx = document.getElementById("girth-measure-chart");
var totalLine = [115, 118, 88, 93, 103, 118, 125]
var total = [112, 115, 85, 90, 100, 115, 122]
var arms = [46, 55, 41, 41, 47, 54, 57]
var neck = [17, 20, 15, 15, 17, 20, 21]
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep"],
datasets: [{
type: 'line',
label: 'Total Line',
data: totalLine,
fill: false,
borderColor: ["#ff7899"],
legend: false,
pointBackgroundColor: "#ff151f",
pointRadius: 8,
pointHoverRadius: 8,
pointHoverBackgroundColor: "#990e14",
pointHoverBorderColor: "#6754d3"
}, {
type: 'bar',
label: 'Neck',
data: neck,
backgroundColor: "#e99449",
hoverBackgroundColor: "#d36d14"
}, {
type: 'bar',
label: 'Arms',
data: arms,
backgroundColor: "#49bae9",
hoverBackgroundColor: "#0789bf"
}, {
type: 'bar',
label: 'Total',
data: total,
backgroundColor: "#6754d3",
hoverBackgroundColor: "#260cbd"
}
]
},
options: {
legend: {
labels: {
filter: function(legendItem, chartData) {
if (legendItem.datasetIndex === 0) {
return false;
}
return true;
}
}
},
responsive: true,
scales: {
xAxes: [{
stacked: true,
gridLines: {
display: false
},
barThickness: 25,
ticks: {
display: true,
fontFamily: "Montserrat",
fontColor: "#2c405a",
fontSize: 12
}
}],
yAxes: [{
gridLines: {
display: false
},
ticks: {
display: false,
stepSize: 10,
min: 0,
max: 150,
}
}]
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.1/Chart.bundle.js"></script>
<div class="chart-container">
<div class="girth-measure-chart-inner" style="width: 100%;">
<canvas id="girth-measure-chart" height=""></canvas>
</div>
</div>
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