Errors in console TypeError: Failed to execute 'expand' on 'Range': The node provided is null.

[gignac-cha]

There are errors in console:

TypeError: Failed to execute 'expand' on 'Range': The node provided is null.

or,

DOMException: Failed to execute 'setEndAfter' on 'Range': the given Node has no parent.

Screenshot

The error comes from the following source code:

MouseTooltipTranslator/src/event/mouseover.js

Lines 96 to 109 in baa4cee

	async function expandRange(range, type) {
	try {
	if (type == "container" || !range.expand) {
	range.setStartBefore(range.startContainer);
	range.setEndAfter(range.startContainer);
	range.setStart(range.startContainer, 0);
	} else {
	range.expand(type); // "word" or "sentence"
	// await expandRangeWithSeg(range, type);
	}
	} catch (error) {
	console.log(error);
	}
	}

I've tested with the next code: gignac-cha@21f7472

Diff

var clientX = 0;
var clientY = 0;
var _win;
var _isIframe = false;
var styleElement;
const PARENT_TAGS_TO_EXCLUDE = ["STYLE", "SCRIPT", "TITLE"];
+const rangeNodeMap = new Map();

async function expandRange(range, type) {
+  if (!rangeNodeMap.get(range)) {
+    return;
+  }
  try {
    if (type == "container" || !range.expand) {
      range.setStartBefore(range.startContainer);
      range.setEndAfter(range.startContainer);
      range.setStart(range.startContainer, 0);
    } else {
      range.expand(type); // "word" or "sentence"
      // await expandRangeWithSeg(range, type);
    }
  } catch (error) {
    console.log(error);
  }
}

export function getTextRange(textNode) {
  var range = document.createRange();
  range.setStart(textNode, 0);
  range.setEnd(textNode, textNode.length);
+  rangeNodeMap.set(range, textNode);
  return range;
}

export function getCharRanges(textNode) {
  var ranges = [];
  for (let i = 0; i < textNode.length - 1; i++) {
    var range = document.createRange();
    range.setStart(textNode, i);
    range.setEnd(textNode, i + 1);
    ranges.push(range);
+    rangeNodeMap.set(range, textNode);
  }
  return ranges;
}

then no more error.

No errors in incognito mode, so it seems to be a conflict with other extensions.
(I think the problem comes from Video Speed Controller...)
(and I don't know why but the error occurs in https://github.com/<organization>/<repository>/pull/<pull_request_number>/files even in incognito mode!)

If you don't need to fix this, please ignore it.