https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy#Browser_compatibility https://developer.mozilla.org/en-US/docs/Web/JavaSc

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy#Browser_compatibility https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe... It's not "new" at all, Firefox has had it since v18 (mid 2012 [0]), Chrome since v49 (early 2016 [1]), etc. [0] https://en.wikipedia.org/wiki/Firefox_version_history https://en.wikipedia.org/wiki/Firefox_version_history [1] https://en.wikipedia.org/wiki/Google_Chrome_version_history https://en.wikipedia.org/wiki/Google_Chrome_version_history