JavaScript - Chart.js 工具提示显示错误的 x 轴值 [英] JavaScript - Chart.js tooltip shows wrong x-axis value

问题描述

我有一个包含两个不同数据集的图表，但有时它们具有相同的 x、y 坐标.但是，当我将鼠标悬停在共享点上时，它有时会显示错误的日期.y 值正确，但 x 值显示不正确.

尝试将鼠标悬停在 共享点

<小时>

更新

我更新了日期相同的笔和定点.感谢 @Oluwafemi Sule，我还添加了 type: 'time'.

这里是我编辑的笔.

但是现在，x 轴上的日期很奇怪.他们不再说 March 06, 2011，而是说 Q1 2011.而且工具提示仍然存在错误.

解决方案

您在图表配置中为类别笛卡尔轴定义了自定义比例.将 xAxes 的类型设置为类别".这可能不是必需的，因为 ChartJS 默认会选择它.

选项:{秤:{x轴:[{类型:'类别'，……

另外，第二个数据集的格式不正确.您应该以 {x: xval, y: yval}<​​/code> 格式提供数据点.

参考资料:

http://www.chartjs.org/docs/latest/axes/cartesian/time.html#time-cartesian-axis

I have a chart with two different datasets, but sometimes they have the same x, y coordinates. But when I hover a shared point, it sometimes shows the wrong date. The y value is correct, but it's the x value that is not showing correctly.

Try hovering a shared point here on codepen.

In the image below you can see I'm hovering { y: 56.04, x: April 05, 2014 }, but is shows the xLabel value of 58.28, which is April 15, 2012. Also, you can see in the chart that both 57.05 and 58.28 have April 15, 2012 as x-value, but they are not on the same y position!

The code is too long to share on stackoverflow, but I made this codepen so you can view, fork and edit it there.

---

Update

I updated the pen and fixed points that have the same date. I also added type: 'time' thanks to @Oluwafemi Sule.

Here my edited pen.

But now, the dates on the x-axis are weird. They don't say March 06, 2011 anymore, but they say Q1 2011. And the tooltips still bug.

解决方案

You defined a custom scale for a category cartesian axis in your chart configuration. Set the type for your xAxes to 'category'. This may not be neccessary as ChartJS picks this up by default.

options: {
    scales: {
        xAxes: [{
            type: 'category',
            ....

Also, the second data set isn't formatted properly. You should supply the data points in {x: xval, y: yval} format.

References:

http://www.chartjs.org/docs/latest/axes/cartesian/time.html#time-cartesian-axis

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