LibWeb: Only serialize CSS numbers with up to 5 decimals

This fixes an issue where we'd serialize some floating point numbers with excessive precision, resulting in unpleasant-looking numbers like 0.49999999999999999 and such. At least 90 new subtests passing on WPT, possibly more. :^)
Author: https://github.com/awesomekling Commit: cef9564728 Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4803
2025-08-01 05:39:11 +00:00 · 2025-05-18 15:59:11 +02:00 · 2025-05-18 15:59:11 +02:00 · cef9564728 · 2025-05-18 15:24:26 +00:00
commit cef9564728
parent f813c495ae
2 changed files with 93 additions and 93 deletions
--- a/Libraries/LibWeb/CSS/Number.cpp
+++ b/Libraries/LibWeb/CSS/Number.cpp
@ -19,7 +19,7 @@ String Number::to_string() const
        return "-infinity"_string;
    if (isnan(m_value))
        return "NaN"_string;
-    return String::number(m_value);
+    return MUST(String::formatted("{:.5}", m_value));
 }

 }