Why i get undefined value

[tigerHeeJS]

version:

"postcss-css-variables": "^0.17.0"

use plugin:

result:

[MadLittleMods]

@tigerHeeJS Please provide your input CSS, the actual result, and your expected result

[tigerHeeJS]

Sorry, I saw other issues and learned that the reason is that the postcss-css-variables can't automatically recognize DOM structure. I use it like:

.a{
  --color1: #ff6100;
}
.b{
color: var(--color1);
}