Steps to reproduce: 1. Open https://jsfiddle.net/jxd3c08u/2/ What went wrong: Second and third "Hello World" wraps into new line after "Hello" Expected result: "Hello World" should be in one line Cause: The container element of the Hello World text has floating point width: 183.03px. When we use calculated width (calc(100% - 0px)) it cause probably a rounding and the width for that element becomes 183px and the two word no longer fit into that. Firefox and Chrome behaves as expected and there is no line wrap.
Created attachment 429038 [details] Screenshot
Created attachment 429043 [details] Test reduction
Created attachment 429045 [details] Test reduction
Created attachment 429052 [details] Patch
Committed r277738 (237910@main): <https://commits.webkit.org/237910@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 429052 [details].
<rdar://problem/78214873>
Thanks for the bug report! -appreciate the test reduction.
*** Bug 227025 has been marked as a duplicate of this bug. ***