onHover 事件未在 chart.js 中触发 [英] onHover event is not triggering in chart.js

问题描述

我想在鼠标在图表上移动时更改光标，例如 this fiddle.这适用于 chart.js v2.4 但不适用于 v2.6 &v2.7有什么想法吗?

I want to change the cursor when the mouse moves on the chart, something like this fiddle. This works with chart.js v2.4 but not works with v2.6 & v2.7 any idea?

var ctx = document.getElementById("canvas1").getContext("2d");
 var mychart = new Chart(ctx, {
  type: 'doughnut',
  data: {
  labels: ['uno', 'dos', 'tres', 'cuatro'],
   datasets: [{
  data: [1, 2, 3, 4],
  backgroundColor: ["#BDC3C7","#9B59B6","#E74C3C","#26B99A"]
   }]
    },
    options: {
    hover: {
  onHover: function(e) {
    $("#canvas1").css("cursor", e[0] ? "pointer" : "default");

    /* without jquery it can be like this:
      var el = document.getElementById("canvas1");
      el.style.cursor = e[0] ? "pointer" : "default";
    */
  }
 }
 }
  });

推荐答案

从v2.5 起，onHover 回调的参数已更改.请参阅 PR#3669

From v2.5 onwards parameters of onHover callback has been changed. See PR#3669

onHover 回调现在有 3 个参数.第二个参数是事件触发了悬停.这样做是为了与onClick 回调.

onHover callback now has 3 parameters. The 2nd parameter is the event that triggered the hover. This was done for consistency with the onClick callback.

function(event, activeElements) {

}

以前，activeEvents 是第一个参数，并且没有传递事件.

Previously, activeEvents was the first argument, and event was not passed.

您可以查看v2.5的发行说明

所以你必须改变你的 onHover 回调 如下:

So you've to change your onHover callback as follows:

  onHover: function(event,elements) {
    $("#canvas1").css("cursor", elements[0] ? "pointer" : "default");
  }

更新的 jsFiddle

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