Returning undefined from treeWalker throws error

[lodin]

Returning undefined from treeWalker throws error

[Lodin]

Hi @mattvague. Sorry for making you wait for so long time.

Could you please provide an example of how you want to use yielding null? According to my design, you can just skip children yielding (e.g. if the children array is empty or the ), and everythig will work as expected.

[Lodin]

Oh, I misread a part of you message. About yielding undefined: it is not possible because by the undefined value the start of the new node is detected. You can see it in the example:

function* treeWalker() {
  // intro

  while (true) {
    const parent = yield;  // Here is the trick
  }
}

Here is the detection in the code.