我要在Chartjs(v2.9.3)中设置以下默认值,以更改条形图的默认外观:
Chart.defaults.bar.scales.xAxes[0].categoryPercentage = .95;
这会导致以下弃用警告:
bar chart: "scales.[x/y]Axes.categoryPercentage" is deprecated. Please use "dataset.categoryPercentage" instead
但是我无法做到这一点,其中包括我尝试过的其他方法:
Chart.defaults.bar.dataset.categoryPercentage = 1;
Chart.defaults.bar.datasets[0].categoryPercentage = 1;
Chart.defaults.global.bar.dataset.categoryPercentage = 1;
Chart.defaults.global.bar.datasets[0].categoryPercentage = 1;
是否有很好的资源来找到正确的命令来设置默认值?不幸的是,原本优秀的文档在这方面还很不完善。
以上并不是我正在努力的唯一默认设置。
例如,以下操作不会执行任何操作(即使Chart.defaults.global.hover.animationDuration = 50;
有效):
Chart.defaults.global.hover.mode = 'index';
Chart.defaults.global.hover.intersect = true;
答案 0 :(得分:3)
以下是用于全局更改栏categoryPercentage
的正确语法:
Chart.defaults.global.datasets.bar.categoryPercentage = 0.95;
这是一个工作示例:
Chart.defaults.global.datasets.bar.categoryPercentage = 0.95;
var canvas = document.getElementById('myChart');
var data = {
labels: ["A", "B", "C", "D", "E"],
datasets: [{
label: "Occurrences",
data: [3, 5, 2, 4, 6],
fill: false,
backgroundColor: ["rgba(255, 99, 132, 0.2)", "rgba(255, 159, 64, 0.2)", "rgba(255, 205, 86, 0.2)", "rgba(75, 192, 192, 0.2)", "rgba(54, 162, 235, 0.2)"],
borderColor: ["rgb(255, 99, 132)", "rgb(255, 159, 64)", "rgb(255, 205, 86)", "rgb(75, 192, 192)", "rgb(54, 162, 235)"],
borderWidth: 1
}]
};
var option = {
scales: {
yAxes:[{
ticks: {
beginAtZero: true
}
}]
}
};
var myBarChart = Chart.Bar(canvas, {
data:data,
options:option
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.min.js"></script>
<canvas id="myChart" width="400" height="200"></canvas>
要了解
Chart.defaults
中包含的其他有效选项,只需将其登录到控制台(console.log(Chart.defaults)
)并搜索选项名称。
答案 1 :(得分:0)
你不需要全局设置,我其实建议你按照documentation为每个图表设置。
var canvas = document.getElementById('myChart');
var data = {
labels: ["A", "B", "C", "D", "E"],
datasets: [{
label: "Occurrences",
data: [3, 5, 2, 4, 6],
fill: false,
backgroundColor: ["rgba(255, 99, 132, 0.2)", "rgba(255, 159, 64, 0.2)", "rgba(255, 205, 86, 0.2)", "rgba(75, 192, 192, 0.2)", "rgba(54, 162, 235, 0.2)"],
borderColor: ["rgb(255, 99, 132)", "rgb(255, 159, 64)", "rgb(255, 205, 86)", "rgb(75, 192, 192)", "rgb(54, 162, 235)"],
borderWidth: 1
}]
};
var option = {
datasets: {
bar: {
categoryPercentage: 0.95
}
},
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}]
}
};
var myBarChart = Chart.Bar(canvas, {
data: data,
options: option
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.min.js"></script>
<canvas id="myChart" width="400" height="200"></canvas>