mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2025-12-27 02:36:03 +00:00
f99a4e7664
For five minutes I stared at the following code...
if(value != null && typeof value === "object") {
Object.freeze(value);
}
... and at the error message that led me to this code: `Object.freeze called on non-object`
And then I remembered that js treads null as object (http://www.ecma-international.org/ecma-262/5.1/#sec-11.4.3). This means the `typeof === "object"` will not discover null and freeze will throw an error...
So `value != null` will also work when value is undefined.
A hard to find bug ;)