The node.links() function returns an array of links to the children of the node object, each link object has a source and a target field that hold references to child nodes.
Syntax:
node.links();
Parameters: This method does not accept any parameters.
Return Values: This method returns an array of links to the children of the node object.
Example 1:
HTML
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src= </script> </head> <body> <script> var data = { "name":"neveropen", "about":"Computer Science Portal", "children":[ {"name":"GFG1"}, {"name":"GFG2"}, {"name":"GFG3"} ] } var root = d3.hierarchy(data); a=root.links(); console.log(a); for (i=0;i<a.length;i++){ console.log(a[i].source.children) } </script> </body> </html> |
Output:
Example 2: Root containing no children return empty links array.
HTML
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src= </script> </head> <body> <script> var data = {"name":"GFG1"} var root = d3.hierarchy(data); console.log(root.links()); </script> </body> </html> |
Output:
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