I see the differences in the code and the tests https://src.chromium.org/viewvc/blink/trunk/LayoutTests/fast/forms/resources/common-setrangetext.js?r1=199316&r2=199315&pathrev=199316 https://searchfox.org/wubkat/rev/e87eb5586000c2885aac4f138e394e8236aab3dd/LayoutTests/fast/forms/resources/common-setrangetext.js#86-89 but at the same time I see all tests passing on WPT. https://wpt.fyi/results/html/semantics/forms/textfieldselection/textfieldselection-setRangeText.html?label=master&label=experimental&aligned&view=subtest&q=setrangetext Wenson or Ryosuke might give a informed opinion about it.

<rdar://problem/103369726>

I took a test from our tree, which Blink modified via patch and changed in JSFiddle and we pass all tests (have old behavior) while Chrome Canary 118 and Firefox Nightly 118 both fail subset of tests on same error, so we have odd behavior compared to other browsers, so I think we should merge this and align our behavior with other browsers. Adding 'BrowserCompat' tag as well.

After updating to latest `common-setrangetext.js` from Blink, we do fail tests: > fast/forms/search/search-setrangetext.html > fast/forms/setrangetext.html > fast/forms/textarea/textarea-setrangetext.html