Highcharts渲染器按钮ID

Question

I've rendered the buttons to multiple Highcharts , but I need to know which button I click..

Example

API

Answer 1

Inside a callback this refers to the clicked button. You can also set its id if you use attr() method.

var custombutton = charts[i].renderer.button('button', 450, 10, function() {
  // not working
  alert(this.element.id);
}, null, hoverState, pressedState).attr({
  id: 'button-' + i
}).add();

example: http://jsfiddle.net/kh5jY/9517/