local-css minification: case-insensitive classes conflict

[isjs0]

When using esbuild with CSS modules, the minification process can result in conflicting class names due to CSS being case-insensitive. For example:

Input CSS:
.class1 { color: red; } .class2 { color: blue; }

Some Minified Output:
.a { color: red; } .A { color: blue; }

In HTML, .a and .A are treated as the same class due to case insensitivity, which causes style conflicts or overrides. This behavior can break functionality.

In Example 0.24.2 expected color: #004, but applied color: #01a.

[evanw]

That's not good at all. Thanks very much for the report.