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> *I personally think its syntax is confusing.*

Well, it's just a matter of getting used to it, I guess :-)

---

Anyway, this code is just looping through all `childNodes` and in each iteration it calls the `replaceIn` function, passing the element as argument.

Therefore, you could replace the `for..of` with a traditional `for` loop:

```javascript
function replaceIn(e) {
  if (e.nodeType == Node.TEXT_NODE) {
    e.nodeValue = e.nodeValue.replaceAll("a", "");
  } else {
    for (let i = 0; i < e.childNodes.length; i++) {
      replaceIn(e.childNodes[i]);
    }
  }
}
```

Or you could use the [`forEach` method](https://developer.mozilla.org/en-US/docs/Web/API/NodeList/forEach):

```javascript
function replaceIn(e) {
  if (e.nodeType == Node.TEXT_NODE) {
    e.nodeValue = e.nodeValue.replaceAll("a", "");
  } else {
    e.childNodes.forEach(replaceIn);
  }
}
```

With both, you achieve the same result.