Merge pull request #161 from inokawa/index-size-error

Add guard to avoid IndexSizeError on selection change

Author: inokawa

src/utils.tsx

@@ -1,7 +1,7 @@
 /**
  * @internal
  */
-export const { min } = Math;
+export const { min, max } = Math;
 
 /**
  * @internal

src/vendor/range-at-index.js

@@ -1,10 +1,13 @@
+import { max } from "../utils";
+
 /**
  * range-at-index
  * https://github.com/webmodules/range-at-index/
  * Nathan Rajlich
  *
  * Forked from version 1.0.4; includes the following modifications:
  * 1) Change module.exports to export default.
+ * 2) Fix for https://github.com/inokawa/rich-textarea/issues/160
  **/
 
 /**
@@ -44,8 +47,8 @@ function RangeAtIndex(el, index, offset, range) {
   }
 
   // update the range with the start and end offsets
-  if (start.node) range.setStart(start.node, start.offset);
-  if (end.node) range.setEnd(end.node, end.offset);
+  if (start.node) range.setStart(start.node, max(start.offset, 0));
+  if (end.node) range.setEnd(end.node, max(end.offset, 0));
 
   return range;
 }