gistfile1.txt

<VictorySharedEvents
  events={[
    {
      childName: "firstBar", // if a child name is not provided, event will be attached to all children. 
      target: "data", // what type of element to attach to. Matches the style namespaces
      eventKey: 1, // What event key of element to attach to. Defaults to the index in data. 
      eventHandlers: {
        onClick: () => {
          return {
            childName: "secondBar", // the child to be modified
            // props here are the props that define the targeted component i.e. what is passed to an individual bar
            mutation: (props) => { 
              return {style: merge({}, props.style, {fill: "blue"})}; // Whatever is returned here will override the existing props
            }
          };
        }
      }
    }, {
      childName: "secondBar",
      target: "data",
      eventKey: 0,
      eventHandlers: {
        onClick: () => { // event handlers can return an array of mutation objects with different targeted elements
          return [
            {
              childName: "firstBar",
              mutation: (props) => {
                return {style: merge({}, props.style, {fill: "cyan"})};
              }
            }, {
              mutation: (props) => { // the default target element is whatever element the handler is attached to
                return {style: merge({}, props.style, {fill: "orange"})};
              }
            }, {
              target: "labels",
              eventKey: 1,
              mutation: () => {
                return {text: "CLICKED"};
              }
            }
          ];
        }
      }
    }
  ]}
>
  <VictoryBar
    name="firstBar" // if children don't have name props they can be referenced by index in shared events
    style={{
      data: {width: 25, fill: "gold"}
    }}
    data={[{x: "a", y: 2}, {x: "b", y: 3}, {x: "c", y: 4}]}
  />
  <VictoryBar
    name="secondBar"
    data={[{x: "a", y: 2}, {x: "b", y: 3}, {x: "c", y: 4}]}
  />
</VictorySharedEvents>