通过将鼠标悬停在节点上突出显示 D3 中的边

Highlighting edges in D3 by hovering mouse over nodes

我是 D3 的新手,我通过将以下行添加到脚本来使用此模板 (http://bl.ocks.org/mbostock/1153292) to visualize my graph. I'd like to highlight the links that are connected to a node by hovering mouse over the node. I tried the technique used in (http://jsfiddle.net/2pdxz/2/)。

nodes.on('mouseover', function(d) {
  link.style('stroke-width', function(l) {
    if (d === l.source || d === l.target)
      return 4;
    else
      return 2;
    });
});

// Set the stroke width back to normal when mouse leaves the node.
nodes.on('mouseout', function() {
  link.style('stroke-width', 2);
});

但它似乎对我不起作用,当我将鼠标移到节点上时没有任何反应。

如评论中所述,代码的基本原理是正确的,问题是 link 变量应该命名为 path.