javascript - 引用错误: event is not defined firefox d3. js

Question

我在 Firefox 中仅在这一行收到此错误:

.on("mousemove", function() {
    return tooltip.style("top", (event.pageY - 10) + "px").style("left", (event.pageX + 10) + "px");
})

Answer 1

使用d3.event。 d3.event 存储当前事件(如果有)。

.on("mousemove", function() {
    return tooltip.style("top", (d3.event.pageY - 10) + "px").style("left", (d3.event.pageX + 10) + "px");
});

Note that the first parameter of the mouse over function is the data bonded to the corresponding element and second parameter is it's index.